P0667 2018 GMC Sierra Code - Control Module Temperature Sensor Performance
Quick Answer
The P0667 diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to the Control Module Temperature Sensor Performance. Common causes include Faulty control module temperature sensor, Wiring or connector issues related to the temperature sensor, ECM software or hardware malfunctions. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0667 2018 GMC Sierra indicates Control Module Temperature Sensor Performance.
- Common causes
- Common causes include Faulty control module temperature sensor, Wiring or connector issues related to the temperature sensor, ECM software or hardware malfunctions.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0667 2018 GMC Sierra Description
The P0667 diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to the Control Module Temperature Sensor Performance. This code indicates that the engine control module (ECM) has detected a performance issue with the temperature sensor within the control module. The control module temperature sensor is responsible for monitoring the ECM's internal temperature and ensuring it stays within safe operating limits. If the sensor is not functioning properly, it can lead to incorrect temperature readings, which may affect the ECM's ability to control various engine functions.
Common Causes of P0667 2018 GMC Sierra
- Faulty control module temperature sensor
- Wiring or connector issues related to the temperature sensor
- ECM software or hardware malfunctions
- Extreme temperature fluctuations affecting the sensor
- Water or moisture intrusion causing sensor malfunction
Symptoms of P0667 2018 GMC Sierra
- Decreased fuel efficiency
- Rough idling or engine misfires
- Engine hesitation or stalling
- Overheating of the engine
- Illumination of the check engine light
How to Fix P0667 2018 GMC Sierra
- Begin by visually inspecting the wiring and connectors associated with the control module temperature sensor for any signs of damage, corrosion, or loose connections.
- Test the sensor using a multimeter to check for proper resistance and voltage readings. Replace the sensor if it fails the test.
- Clear the DTC from the ECM memory using a scan tool and monitor the sensor's performance to ensure the code does not reappear.
- If the issue persists, consider updating the ECM software to the latest version or replacing the ECM if necessary.
- Once the repair has been completed, perform a test drive to verify that the symptoms associated with the P0667 code have been resolved.
Cost to Fix P0667 2018 GMC Sierra
The cost of repairing a P0667 code on a 2018 GMC Sierra can vary depending on the exact cause of the issue and the specific parts and labor required for the repair. In general, replacing a control module temperature sensor can cost between $100 and $200, including parts and labor. However, additional costs may apply if the ECM needs to be replaced or if software updates are necessary. It's recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on the specific circumstances of the vehicle. Labor rates at auto repair shops typically range from $80 to $150 per hour, so the total cost can vary depending on the shop's location and expertise.
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