How do you reset the check engine light on a Chevy Volt?

An OBD-II scanner is the reliable way to reset the check engine light on a Chevy Volt: read the stored diagnostic trouble codes, fix the underlying fault, and then clear the codes. If the fault isn’t repaired, the light will come back. This guide explains how to do that and what to consider along the way.

Understanding what triggers the light on the Chevy Volt

The Chevrolet Volt blends a gasoline engine with electric drive, and the check engine light (CEL) signals a fault detected by the onboard diagnostics system. Common triggers include misfires, sensor or evap system issues, catalytic converter concerns, oxygen sensor failures, or faults related to the hybrid/gasoline control modules. A solid CEL indicates a stored fault code, while a flashing CEL typically signals a more urgent problem that may require immediate service. In all cases, diagnosing the underlying issue is the first step before attempting to reset the light.

Resetting the light with an OBD-II scanner

If you have access to an OBD-II scanner, this is the recommended method to reset the light once the issue is repaired. Here are the steps.

• Plug the scanner into the OBD-II port under the driver’s dash and turn the ignition to ON (engine not required to start).


• Read the stored diagnostic trouble codes (DTCs) and note them for reference.


• Repair or verify the underlying fault suggested by the codes (or confirm with a technician if the fix isn’t obvious).


• Use the scanner’s option to Clear codes or Erase codes, then turn off the ignition and remove the key.


• Start the engine and drive normally to allow the vehicle’s systems to re-check and illuminate the MIL if a fault persists.

After clearing the codes and driving, the check engine light should reset if the fault has been fixed. If it returns, the issue may be more persistent and require further diagnostics.

Additional notes and safety considerations

Before you attempt to reset or clear codes, consider these cautions and best practices:

• A flashing check engine light indicates a severe fault (such as a misfire). Stop driving and seek assistance promptly.


• A solid light can be triggered by relatively minor issues (like a loose gas cap) but still merits diagnosis to avoid hidden damage or emissions problems.


• Gas cap seating or deterioration can cause evap-related codes; reseal or replace as needed and recheck.


• Clearing codes without repairing the underlying problem will usually cause the light to return once the monitors run a new cycle.


• Auto parts stores often offer free code reads to identify the fault; for complex hybrid/electrical systems, a GM-certified technician may be required for accurate diagnosis.

Remember: clearing codes is not a fix; it simply resets the warning until the diagnostics re-checks the system. If you’re unsure about the fault or the reset process, seek professional diagnostics.

What to do if the light returns or you can’t clear it

If the check engine light comes back after clearing codes, or you’re unable to erase it, take these steps:

• Re-scan with an OBD-II tool to identify current codes and track any changes since the last diagnostic.


• Verify that the repair was performed correctly and that the fault is resolved.


• Check for common Volt-specific issues indicated by the codes (for example, evaporation system or sensor faults) and plan targeted fixes.


• If codes involve the high-voltage system or HV battery, contact a GM-certified technician rather than attempting DIY repairs.


• Drive cycles may be required for some monitors to complete, which can take several trips to fully reset readiness data.

If you cannot clear the codes or the light persists, schedule a diagnostic appointment with a Chevrolet service center. They can access factory diagnostic data and perform necessary repairs safely.

When to seek professional help

Professional diagnostics are advisable for high-risk codes, persistent faults, or issues involving the hybrid/high-voltage system. If you’re uncomfortable working around 12V or HV components, or if the vehicle is under warranty, contact a dealer or certified technician to avoid safety risks.

Summary

The Chevy Volt’s check engine light signals that the vehicle’s diagnostics have detected a fault in the powertrain or emissions systems. The most reliable way to reset the light is to clear the stored diagnostic trouble codes with an OBD-II scanner after addressing the underlying issue. If the fault persists, the light will reappear, and further diagnosis will be required. Always diagnose and repair root causes first, use a scanner to reset codes, and seek professional help if the codes involve high-voltage systems or if you’re unsure about the repair.

How to reset check engine light on Chevy Volt?

To reset the check engine light on a Chevy Volt, first resolve the underlying issue, as the light will often turn off on its own after a few drive cycles. If the light persists after fixing the problem, you can manually reset it by using an OBD-II scanner to clear the codes, or by disconnecting the negative terminal of the 12-volt battery for about 10-15 minutes to clear the car's computer memory.
 
This video demonstrates how to reset the check engine light on a Chevy Volt using a diagnostic tool: 49sHidalgo Motors Co TVYouTube · Dec 28, 2023
Method 1: Using an OBD-II scanner

1. Plug the scanner: into the OBD-II port, usually located under the dashboard. 
2. Turn the ignition: to the "on" or "accessory" position, without starting the engine. 
3. Use the scanner: to read the fault codes and then select the option to "clear" or "erase" the codes. 
4. Turn the vehicle off and back on: to see if the light has gone out. 

Method 2: Disconnecting the battery

1. Turn off the vehicle: and open the hood. 
2. Locate the negative terminal: on the 12-volt battery, which is typically black and marked with a minus (-) sign. 
3. Loosen the bolt: on the negative terminal with a wrench and disconnect the negative cable. 
4. Wait 10 to 15 minutes: for the vehicle's computer to fully power down. 
5. Reconnect the negative cable: and tighten the bolt securely. 
6. Start the vehicle: to see if the check engine light has been reset. 

This video shows how to reset the check engine light on a Chevy Volt by disconnecting the battery: 58sMechanic BaseYouTube · May 24, 2023
Important considerations

• Fix the problem first: Both of these methods will only temporarily turn off the light. If the underlying issue isn't resolved, the check engine light will likely come back on. 
• Drive cycles: After fixing a simple problem like a loose gas cap, the light may automatically reset itself after several miles of driving as the car's computer re-evaluates the system. 
• Diagnostic services: If the light returns or you are unsure of the cause, it is best to have a qualified mechanic diagnose and fix the problem to prevent potential damage to your vehicle. 

You can also watch this video to learn about the potential cause of the check engine light on a Chevy Volt: 55sAuto Scholar with Mr BYouTube · Aug 1, 2023

How to reset check engine light without disconnecting battery Chevy?

Go in and start your vehicle. And all you need is 10 seconds of that fuse being taken out start your vehicle. And your check engine light is gone. No check engine. Light.

How to clear a Chevy check engine light?

Method 2: Disconnect the Battery

1. Turn off your Chevy and open the hood.
2. Locate the battery and disconnect the negative cable (usually black with a "-" symbol).
3. Wait about 15 minutes for the car's computer to reset.
4. Reconnect the negative battery cable.
5. Start your Chevy and check if the light is gone.

Can I reset the check engine light myself?

Connecting to an OBD-II Port
You plug an OBD-II scanner tool into it and, in most cases, out pops a code that tells you what the problem is. The scanner also allows you to clear the vehicle's internal code, which is what triggered the check-engine light. Do that, and the warning light will turn off.