P1371 Code Description GMC
The P1371 code for GMC indicates a problem with the low-resolution signal from the distributor in the vehicle’s ignition system. In modern vehicles, the ignition system plays a crucial role in starting the engine and maintaining its optimal performance. The low-resolution signal is used by the engine control module (ECM) to determine the engine’s speed and position, which is essential for proper ignition timing and fuel delivery.
Common Causes of P1371 GMC
NOTE: The listed causes may not be a complete list of all potential issues, and there may be other causes.
- Faulty distributor
- Damaged ignition coil
- Wiring issues in the ignition system
- ECM malfunction
- Poor electrical connection
Symptoms of P1371 GMC
- Rough idle
- Engine misfires
- Hesitation during acceleration
- Reduced fuel efficiency
- Engine stalling
How to Fix P1371 GMC Code
- Start by visually inspecting the distributor, ignition coil, and wiring for any obvious signs of damage or wear.
- Use a multimeter to test the low-resolution signal output from the distributor to the ECM.
- Check for any loose or corroded electrical connections in the ignition system.
- Replace the distributor, ignition coil, or any damaged wiring if necessary.
- Clear the diagnostic trouble codes from the ECM and test the vehicle to ensure the issue has been resolved.