Chevrolet Code P1371 – Ignition Control Module 4X Reference Circuit Too Many Pulses

Code P1370 Chevrolet Description

Code P1370 for Chevrolet vehicles indicates a problem with the ignition control module’s (ICM) 4X reference circuit, specifically that too many pulses are detected. The ICM plays a crucial role in the ignition system, controlling the timing of the spark plugs to ensure proper engine combustion. When too many pulses are detected in the reference circuit, it can lead to engine misfires, rough idling, and overall poor engine performance.

Common Causes of Chevrolet Code P1370

NOTE: The listed causes may not be a complete list of all potential issues, and there may be other causes.

1. Faulty ignition control module (ICM)
2. Wiring issues in the 4X reference circuit
3. Malfunctioning crankshaft position sensor
4. Engine timing problems
5. ECM (engine control module) failure

Symptoms of P1370 Chevrolet

1. Engine misfires
2. Rough idling
3. Hesitation or lack of power
4. Stumbling
5. Decreased fuel efficiency

How to Fix Chevrolet Code P1370

1. Start by diagnosing the specific cause of the issue using a scan tool to read the code and perform additional tests if necessary.
2. Inspect the ignition control module (ICM) for any signs of damage or wear and replace it if necessary.
3. Check the wiring of the 4X reference circuit for any breaks, corrosion, or loose connections and repair if needed.
4. Test the crankshaft position sensor to ensure it is functioning correctly and replace it if faulty.
5. If the problem persists, consider checking the engine timing and the ECM for any potential issues.