P1376 Code Description
The P1376 code relates to the vehicle’s ignition ground circuit. This code indicates a malfunction in the ground circuit of the ignition system, which can lead to issues with spark plug ignition, engine performance, and overall vehicle operation. The ignition ground circuit is responsible for providing a path for electrical current to flow from the ignition system components to the vehicle’s ground, ensuring proper ignition system function. If this circuit is compromised, it can result in misfires, rough idling, poor fuel economy, and potentially even engine stalling.
Common Causes of P1376
NOTE: The listed causes may not be a complete list of all potential issues, and there could be other causes.
- Corrosion or damage to the ignition ground wiring
- Loose or disconnected ground connections
- Faulty ignition coil
- Defective ignition control module
- Issues with the engine control module (ECM)
Symptoms of P1376
- Engine misfires
- Rough idling
- Poor fuel efficiency
- Engine stalling
- Difficulty starting the vehicle
How to Fix P1376
- Start by inspecting the ignition ground wiring for any signs of damage, corrosion, or loose connections. Repair or replace any damaged wiring.
- Check and tighten all ground connections related to the ignition system.
- Verify the proper operation of the ignition coil and ignition control module. Replace any faulty components.
- If necessary, diagnose and resolve any issues with the engine control module (ECM) that may be causing the problem.
- Clear the diagnostic codes from the vehicle’s computer and test the ignition system to ensure proper operation.