Are you having trouble starting your General Motors (GM) vehicle? Does the engine stall frequently or is the battery dead? If so, you may be experiencing a common issue in GM vehicles the P1682 code. This diagnostic trouble code (DTC) indicates a problem with the ignition switch circuit and can cause various symptoms that affect your vehicle’s performance.
The P1682 code is particularly prevalent in GM models manufactured between 2004 and 2014. When this code appears, it can be frustrating for drivers as it affects their daily commute. However, understanding what causes this issue and how to fix it can help alleviate these problems.
So if you’re curious about this DTC or facing similar issues with your GM vehicle, keep reading to learn more.
Symptoms of P1682 Code
If you own a car, it’s essential to know the symptoms of different codes that may appear on your dashboard. One such code is the P1682 code. This code indicates a malfunction in the ignition supply voltage circuit, which can cause various issues with your vehicle’s performance.
Engine Light Turns On
The most common symptom of the P1682 code is an illuminated check engine light on your dashboard. When this light turns on, it means that there’s a problem with one or more systems in your car. While other issues can trigger this light, if you see it along with any other symptoms mentioned below, then it could be due to the P1682 code.
Car Won’t Start
Another significant symptom of the P1682 code is that your car won’t start properly. When you turn the key in the ignition, nothing happens or only a clicking sound comes from under the hood. This issue typically occurs when there’s no power supply to certain parts of your vehicle due to a malfunctioning circuit.
Car Stalls While Driving
If you’re driving and suddenly notice that your car stalls or shuts off without warning, then it could be due to the P1682 code. A malfunctioning ignition supply voltage circuit can cause intermittent power loss to critical components like fuel injectors and sensors. This leads to stalling while driving and puts you at risk for accidents.
Transmission Shifts Roughly
A faulty ignition supply voltage circuit can also affect your transmission’s performance by causing rough shifting or hesitation during gear changes. You may feel jerking movements or hear strange noises coming from under the hood while shifting gears.
Reduced Power Mode Activated
In some cases, when there’s an issue with a vital component like an ignition supply voltage circuit, modern vehicles automatically activate a reduced power mode. This mode limits the car’s speed and performance, making it difficult to drive at higher speeds or climb hills.
Common Causes of P1682 Code
If you own a vehicle, you might have encountered the dreaded P1682 code. This code is related to the starting system of your car and can cause significant inconvenience if not addressed promptly.
Low Battery Voltage
One of the most common causes of the P1682 code is low battery voltage. If your car’s battery is weak or dead, it can trigger this code. The starting system requires a certain level of voltage to function correctly, and if that threshold is not met, it can cause issues with starting your car.
To fix this issue, you may need to replace your battery or recharge it fully. You should also check for any parasitic drains on your battery that could be causing it to discharge quickly.
Faulty Ignition Switch or Starter Relay
Another possible cause of the P1682 code is a faulty ignition switch or starter relay. These components are responsible for sending power to the starter motor when you turn the key in your ignition.
If either component fails, it can prevent power from reaching the starter motor and trigger the P1682 code. To fix this issue, you will need to replace the faulty component.
Loose or Corroded Electrical Connections
Loose or corroded electrical connections in your car’s starting system can also cause the P1682 code. Over time, these connections can become loose due to vibrations and wear and tear.
Corrosion on these connections can also impede electrical flow and cause issues with starting your car. To fix this issue, you will need to inspect all electrical connections in your starting system and tighten any loose ones. You should also clean any corrosion off these connections using a wire brush or sandpaper.
Other Possible Causes
While low battery voltage, faulty ignition switches or starter relays, and loose or corroded electrical connections are the most common causes of the P1682 code, there are other possible causes as well. These include:
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A faulty starter motor
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A damaged or worn-out flywheel or flexplate
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A malfunctioning starter control circuit
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An issue with the engine control module (ECM)
If you have checked all the above-listed causes and still can’t seem to fix the issue, it might be time to take your car to a professional mechanic. They will have specialized diagnostic tools that can help them pinpoint the exact cause of the P1682 code and fix it promptly.
Also Read: P1326 Code: Meaning, Causes, Symptoms & Fixes
Manufacturer-Specific Definitions for P1682 Code
If you are driving a car and the check engine light comes on, it can be alarming. One of the codes that may appear is P1682, which is a manufacturer-specific code indicating an issue with the ignition switch circuit. However, the definition of P1682 may vary depending on the make and model of your vehicle.
What is P1682 Code?
P1682 code indicates that there is an issue with the ignition switch circuit of your car. This code will only apply to vehicles with electronic throttle control systems. The exact definition of this code varies from one manufacturer to another. In general, this code means that there is a problem with the communication between your vehicle’s onboard computer and the ignition switch.
Understanding Manufacturer-Specific Definitions
As mentioned earlier, different car manufacturers have their own definitions for the P1682 code. It is important to understand these definitions as they can help you diagnose and fix the issue accurately.
For example, if you are driving a Chevrolet or GMC vehicle, P1682 means that there is an issue with the ignition 1 switch circuit. On the other hand, if you are driving a Cadillac or Buick vehicle, P1682 means that there is an issue with the ignition 1 switch circuit’s low voltage.
To accurately interpret what your car’s specific definition of P1682 means, it is recommended to consult your vehicle’s manual or take it to a reputable mechanic who has experience working on your make and model.
Diagnosing and Fixing P1682 Code
Once you have understood what your car’s specific definition of P1682 means, diagnosing and fixing it becomes easier.
One common cause of this code is a faulty ignition switch. If this is indeed the case in your situation, replacing it should solve the problem.
Another possible cause could be damaged wiring or connections in the ignition system. Checking all the wiring and connections for any damage or corrosion and repairing them as necessary can help solve the issue.
If you are not familiar with car repairs, it is recommended to take your vehicle to a reputable mechanic who has experience working on your make and model. They will be able to diagnose the problem accurately and fix it properly.
Bad Ignition Switch and P1682 Code
The P1682 code is a diagnostic trouble code (DTC) that indicates an issue with the ignition switch circuit. The ignition switch is responsible for starting the engine and powering various electrical components in your vehicle. If there is a problem with the ignition switch or its circuit, it can trigger the P1682 code.
Bad Ignition Switch
One of the most common reasons for a P1682 code is a bad ignition switch. The ignition switch sends power to the starter motor, which cranks the engine to start it. If there is an issue with the ignition switch, such as worn contacts or a faulty mechanism, it can prevent power from reaching the starter motor and cause the P1682 code to appear.
Faulty Wiring Harness
Another common cause of a P1682 code is a bad wiring harness. The wiring harness connects various electrical components in your vehicle, including the ignition switch and starter motor. If there is damage to any part of the wiring harness, such as frayed wires or loose connections, it can cause issues with power delivery and trigger DTCs like P1682.
Ignition Switch Circuit Issues
The ignition switch circuit can also be responsible for triggering a P1682 code. The circuit includes various components that work together to deliver power to different parts of your vehicle when you turn on the key. If there are problems with any part of this circuit, such as damaged relays or fuses, it can prevent power from reaching important systems like your starter motor and lead to DTCs like P1682.
Diagnosing and Fixing a P1682 Code
If you suspect that your vehicle has triggered a P1682 code due to issues with your ignition switch or its circuitry, you should take it to a qualified mechanic for diagnosis and repair. They will use specialized tools and equipment to identify the root cause of the problem and recommend the best course of action.
Depending on the underlying issue, they may need to replace your ignition switch, repair a damaged wiring harness, or troubleshoot problems with your ignition switch circuit. In some cases, they may also need to clear any stored DTCs from your vehicle’s onboard computer to ensure that it is running smoothly.
ECM and Fuse Problems with P1682 Code
If you own a vehicle, you may have come across the P1682 code. This code is related to the Engine Control Module (ECM) or fuse problems that occur due to issues with the ignition switch.
What is the P1682 Code?
The P1682 code indicates that there is a problem with the ECM or fuse related to the ignition switch. The ECM is responsible for controlling various engine functions such as fuel injection and ignition timing. When there is an issue with the ECM or fuse, it can cause your vehicle to malfunction and trigger the P1682 code.
Causes of P1682 Code
There are several reasons why your vehicle’s ECM or fuse may be causing the P1682 code:
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Blown Fuse: A blown fuse can cause your vehicle’s ECM to malfunction, resulting in a check engine light and triggering the P1682 code.
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Faulty Ignition Switch: If there is a problem with your vehicle’s ignition switch, it can cause electrical problems in your car’s system leading to issues with its control module.
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Wiring Issues: Sometimes faulty wiring within your car’s electrical system can cause problems for its control module leading to error codes like p1682.
Symptoms of P1682 Code
When you experience a problem with your car’s control module or fuses related to its ignition switch, you may notice one or more of these symptoms:
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Check Engine Light Illuminates: The most common symptom of p1682 codes is an illuminated check engine light on your dashboard.
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Vehicle Stalling: Your car may stall while driving if there are issues with its control module.
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Poor Fuel Economy: If there are issues with fuel injection caused by the P1682 code, your vehicle may experience poor fuel economy.
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Difficulty Starting: If there are problems with your ignition switch or control module, it may be difficult to start your vehicle.
Fixing P1682 Code
If you have a check engine light on and suspect that the P1682 code is causing issues with your car’s control module or fuses related to its ignition switch, there are several things you can do:
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Check Fuses: Start by checking the fuses in your car’s electrical system. If any of them are blown, replace them and see if the issue persists.
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Ignition Switch Replacement: If you find that it is an issue with the ignition switch, replacing it should solve the problem.
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Wiring Repair: In some cases, repairing faulty wiring within your vehicle’s electrical system can fix p1682 codes.
Engine Failing to Start and Check Engine Light On
If you have a General Motors (GM) vehicle, specifically a Buick, Cadillac, Chevrolet, or GMC and your engine is failing to start while the check engine light turns on, then it’s likely that you’re dealing with a P1682 code. This code indicates an issue with the throttle actuator control.
Understanding the P1682 Code
The P1682 code is an OBD-II trouble code that indicates a problem with the throttle actuator control module circuit in GM vehicles. This means that there’s an issue with the communication between the engine control module and the throttle actuator control module.
When this happens, your vehicle’s computer system will automatically store this code in its memory and turn on the check engine light to indicate that there’s something wrong. The check engine light may also blink or flash if there’s a severe problem.
Possible Causes of P1682 Code
There are several reasons why your GM vehicle might be showing a P1682 code. Here are some of them:
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Issues with wiring harness: If there are damaged wires or poor connections in the wiring harness between the engine control module and the throttle actuator control module, it can cause communication problems.
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Faulty fuse: A blown fuse can cause electrical issues between these modules.
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Dead battery: A weak or dead battery can also cause communication problems as it affects the power supply to these modules.
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Faulty Engine Control Module (ECM): If there’s a problem with ECM itself, then it won’t be able to communicate properly with other components of your car.
How Serious Is This?
A P1682 code should not be ignored as it can lead to more significant problems if left unaddressed. It indicates that there’s something wrong with your car’s electronic systems which could eventually lead to stalling or even complete failure of your vehicle.
Therefore, it’s essential to get your vehicle checked by a mechanic as soon as possible if you encounter this problem.
Fixing P1682 Code
If you’re dealing with a P1682 code, the first step is to take your vehicle to a certified mechanic who can diagnose and fix the issue. Here are some of the things that they may do:
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Check wiring harness: The mechanic will examine the wiring harness for any damage or lose connections and repair them if necessary.
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Replace fuse: If there’s a blown fuse, then it will need to be replaced.
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Check the battery: The mechanic will check the battery voltage and replace it if needed.
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Replace ECM: If there’s an issue with ECM, then it may need to be replaced.
The cost of fixing a P1682 code will depend on what exactly is causing the problem. Typically, replacing a fuse or repairing a wiring harness won’t cost too much. However, replacing an ECM can be quite expensive.
How to Fix P1682 Code
If you’re experiencing issues with your vehicle’s charging system, the P1682 code may appear on your dashboard. This trouble code indicates that there is a problem with the charging system circuit. Fortunately, this issue can be fixed by following a few simple steps.
Check the Battery and Alternator for Any Issues
The first step in fixing the P1682 code is to check your battery and alternator for any issues. A dead or weak battery can cause problems with the charging system circuit, so it’s important to ensure that your battery is fully charged and functioning properly.
To test your battery, use a multimeter to measure its voltage. If the voltage reading is below 12 volts, then your battery needs to be charged or replaced. On the other hand, if the voltage reading is above 12 volts, then your battery is working fine.
Next, check your alternator for any issues. You can do this by checking its output voltage using a multimeter while the engine is running. The output voltage should be between 13 and 15 volts. If it’s not within this range, then you may need to replace your alternator.
Inspect Wiring and Connections in Charging System
The next step in fixing the P1682 code is to inspect all of the wiring and connections in your vehicle’s charging system circuit. Make sure that all of the wires are properly connected and free from damage or corrosion.
Check all of the fuses related to the charging system as well. If any of them are blown or damaged, they will need to be replaced.
Replace Faulty or Damaged Components
If you’ve checked both your battery/alternator and inspected all wiring/connections but still have an issue with the charging system circuit, then it’s likely that one of its components has failed.
Common components that may fail include:
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Voltage regulator
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Alternator diode
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Battery cables
If any of these components are faulty or damaged, they will need to be replaced.
Reset the Trouble Code Using a Scan Tool
After you’ve fixed the underlying issue causing the P1682 code, you’ll need to reset the trouble code using a scan tool. This will clear the code from your vehicle’s computer and turn off the check engine light.
To do this, plug in a scan tool and follow its instructions for resetting codes. If you don’t have access to a scan tool, you can disconnect your battery for about 15 minutes to reset the computer.
Take Your Vehicle to a Professional Mechanic if Issue Persists
If you’ve followed all of these steps and still have an issue with your vehicle’s charging system circuit, it may be time to take your car to a professional mechanic. They can diagnose and fix any issues that may be causing the P1682 code.
Does P1682 Code Reduce Power?
Understanding the P1682 Code
The P1682 code is a diagnostic trouble code (DTC) that indicates an issue with the ignition switch circuit. This code is commonly found in General Motors (GM) vehicles and can cause several issues, including reduced power or engine stalling. However, it is essential to understand that the P1682 code itself does not directly reduce power.
Causes of the P1682 Code
Several factors can cause the P1682 code, including a faulty ignition switch, wiring issues, or a malfunctioning body control module (BCM). The BCM is responsible for controlling various electronic systems in your vehicle, such as lighting and door locks. If there is an issue with the BCM, it can trigger the P1682 code.
Effects of Ignoring the P1682 Code
While the P1682 code itself does not reduce power, ignoring it can lead to reduced power or even engine stalling. Suppose your vehicle’s BCM has failed and triggered this code. In that case, you may experience intermittent starting problems or other electrical issues that could eventually lead to complete engine failure.
Furthermore, if you ignore this DTC and continue driving your vehicle without fixing it promptly, you may be putting yourself and others at risk. For example, suppose your car stalls while driving on a busy highway due to an underlying issue causing this DTC. In that case, it could result in a severe accident.
Diagnosing and Fixing the Underlying Issue
If you see the check engine light illuminated on your dashboard accompanied by a P1682 DTC reading from your OBD-II scanner or tool, it’s crucial to diagnose and fix this issue immediately. Here are some steps you should follow:
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Consult Your Vehicle’s Owner Manual: Your owner manual will provide valuable information about what this specific DTC means for your particular make and model.
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Check the Ignition Switch: The ignition switch is responsible for turning on your vehicle’s electrical system. If it’s faulty, it can trigger the P1682 code. You may need to replace this component.
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Inspect Wiring: Check all wiring related to the ignition switch and BCM for any signs of damage or wear and tear. Replace any damaged wires or connectors.
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Test the BCM: If you have ruled out issues with the ignition switch and wiring, test your vehicle’s BCM using a scan tool or multimeter to determine if it’s functioning correctly.
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Take Your Vehicle to a Professional Mechanic: If you’re not confident in diagnosing and fixing this issue yourself, take your vehicle to a professional mechanic who can diagnose and fix this problem for you.
More Information on P1682 Code for Specific Makes
If you own a vehicle, you may have come across the P1682 code. This code is specific to certain makes of vehicles and can be quite frustrating to deal with.
What is the P1682 Code?
The P1682 code is a generic powertrain code that indicates there is an issue with the ignition switch circuit. It means that there is a problem with the communication between your vehicle’s body control module (BCM) and engine control module (ECM).
Which Makes Are Affected by the P1682 Code?
The P1682 code is specific to certain makes of vehicles, including:
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Chevrolet
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GMC
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Buick
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Cadillac
Different makes may have different causes for the P1682 code. For example, in Chevrolet vehicles, it could indicate a problem with the ignition switch or a faulty BCM. In Buick vehicles, it could mean that there is an issue with the ECM or BCM.
Understanding the specific make of your vehicle is crucial in diagnosing and fixing the P1682 code.
How to Diagnose and Fix the Issue?
Diagnosing and fixing the issue depends on several factors such as which make of vehicle you own, what caused it, and how severe it is. Here are some steps you can take to diagnose and fix the problem:
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Check for other codes: Before focusing on the P1682 code alone, check if there are any other codes present. If so, address them first as they may be causing or contributing to this issue.
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Inspect wiring: Check for any damaged or loose wires between your BCM and ECM. These wires should be connected securely without any frays or breaks.
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Check battery voltage: Ensure that your battery is fully charged and functioning correctly. Low battery voltage can cause the P1682 code to appear.
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Replace ignition switch: If you own a Chevrolet or GMC vehicle, replacing the ignition switch may fix the issue. This is because these vehicles are prone to faulty ignition switches.
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Replace BCM or ECM: If none of the above steps work, it may be necessary to replace the BCM or ECM in your vehicle.
Check the Engine Light On and Dashboard Lights Turning Off with P1682 Code
If you own a vehicle, it’s likely that you’ve seen the check engine light turn on at some point. While it can be frustrating to see this warning light, it’s essential to pay attention to it. One of the most common reasons for the check engine light to turn on is the P1682 code.
What is the P1682 code?
The P1682 code is related to the ignition switch circuit in your vehicle. This code indicates that there is an issue with the communication between your vehicle’s computer and its ignition system. When this happens, the check engine light will turn on, and dashboard lights may turn off.
Dashboard lights turning off
When your dashboard lights turn off due to the P1682 code, it can cause safety concerns while driving at night. Without proper lighting, you may not be able to see critical information such as speedometer readings or fuel levels. This lack of visibility can lead to accidents or other dangerous situations.
Ignoring the issue
Ignoring a P1682 code can lead to further damage to your vehicle’s electrical system. If left unaddressed, this issue could cause more severe problems down the line that will be more expensive and difficult to fix.
Consulting a professional mechanic
If you notice that your check engine light has turned on and your dashboard lights have turned off, it’s essential to consult with a professional mechanic as soon as possible. They will diagnose what is causing this issue in your car and provide you with the necessary repairs.
Some potential causes of a P1682 code include:
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A faulty ignition switch
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Loose wiring connections
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A damaged starter relay
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Corrosion or rust in electrical components
Your mechanic will use diagnostic tools like an OBD-II scanner or multimeter testing equipment to identify which component needs repair or replacement.
Understanding and Resolving P1682 Code Issues
If you are experiencing issues with your vehicle’s ignition, it may be due to the P1682 code. This code can cause a variety of symptoms, including difficulty starting the engine and dashboard lights turning off.
To summarize, the P1682 code is typically caused by a bad ignition switch or problems with the ECM or fuses. It can also result in reduced power and the engine failing to start. However, it is important to note that different manufacturers may have their own definitions for this code.
If you are experiencing these symptoms with your vehicle, we recommend seeking professional help to diagnose and resolve the issue. Ignoring the problem could lead to further damage and costly repairs.
In conclusion, understanding and resolving P1682 code issues is crucial for maintaining your vehicle’s performance. If you suspect that your car has this issue, take action immediately by consulting a professional mechanic.
FAQs
Q: Can I still drive my car with a P1682 code?
A: While it may be possible to continue driving your car with this issue, we highly recommend against it as it can lead to further damage and potentially dangerous situations on the road.
Q: How much does it cost to fix a P1682 code?
A: The cost of fixing a P1682 code can vary depending on the severity of the issue and what needs to be repaired or replaced. It is best to consult with a professional mechanic for an accurate estimate.
Q: Will resetting my check engine light fix the P1682 code?
A: No, resetting your check engine light will not fix the underlying issue causing the P1682 code. It will only temporarily turn off the warning light until another diagnostic scan is performed.
Q: Can I diagnose and fix a P1682 code myself?
A: While it may be possible for experienced mechanics to diagnose and fix this issue themselves, we highly recommend seeking professional help to avoid further damage or costly mistakes.
Q: How long does it take to fix a P1682 code?
A: The time it takes to fix a P1682 code will depend on the severity of the issue and what needs to be repaired or replaced. It is best to consult with a professional mechanic for an accurate estimate of how long the repair will take.
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