GMC P1375 Code Description
The GMC diagnostic code P1375 refers to the high voltage in the IC 24X reference circuit. This code indicates that a high voltage condition is detected in the 24X reference circuit of the Ignition Control Module (IC). The ignition control module is a critical component that controls the engine’s ignition timing and spark plug firing. The 24X reference circuit provides a signal to the ignition control module to accurately time the ignition sequence.
Common Causes of P1375
NOTE: The listed causes may not be a complete list of all potential issues, and there may be other causes.
- Faulty wiring in the 24X reference circuit
- Faulty ignition control module
- Issues with the engine computer system
- Corrosion or damage to electrical connections
- Exposure to moisture or water damage
Symptoms of P1375
- Engine misfires
- Rough idling or uneven engine operation
- Decreased fuel efficiency
- Engine stalling
- Illumination of the check engine light
How to Fix GMC Code P1375
- Start by performing a thorough inspection of the 24X reference circuit wiring to check for any damage, corrosion, or loose connections.
- Test the ignition control module to determine if it is functioning properly. If it is faulty, replace the ignition control module with a new one.
- Check the engine computer system for any error codes or issues that may affect the 24X reference circuit. Reset the codes and test the system again.
- Clear the diagnostic trouble codes from the vehicle’s computer system using a scan tool.
- Perform a road test of the vehicle to ensure the issue has been resolved and the symptoms associated with code P1375 have been eliminated.