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P1351 Chevrolet Code - Ignition Control Module Circuit High Voltage

- Code Popularity: 106,573 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By AutoCodes.com - Updated May 17, 2019
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|Code P1351 Chevrolet Possible Causes

  • Faulty Ignition Control Module
  • Ignition Control Module harness is open or shorted
  • Ignition Control Module circuit poor electrical connection

|How do I Fix the Code P1351 Chevrolet?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your Chevrolet have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code P1351 Chevrolet?

Labor: 1.0

The cost of diagnosing the P1351 Chevrolet code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|When is the Code P1351 Chevrolet Detected?

The Powertrain Control Module (PCM) detects an open in the Ignition Control Module (ICM)

|What are Code P1351 Chevrolet Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|Code P1351 Chevrolet Description

The Ignition Control Module (ICM) has independent power and ground circuits. The circuits between the ICM and the Powertrain Control Module (PCM) consists of the following circuits:
-The ignition control (IC) timing signal
-The IC timing control
-The low resolution engine speed signal
-The medium resolution engine signal
-The camshaft position signal
-The low reference
The ICM sends 3X signals to the PCM, and controls the timing advance during engine cranking. The timing advance changes to PCM control after the following actions occur:
The PCM receives the second 3X signal
The PCM applies 5 volts to the ignition control (IC) timing signal circuit.
The ICM monitors the CKP sync signal when the engine is cranking. The CKP sync signal is passed from the CKP sensor to the ICM on the CKP sensor 2 signal circuit. The CKP sync signal is used to determine the correct cylinder pair and initiate the ignition coil firing sequence. The 18X reference pulses are passed from the CKP sensor to the ICM on the CKP sensor 1 circuit. The 18X reference pulses are used for fuel injection and ignition control. After the ICM receives both signals, the ICM passes the 18X and 3X reference signals to the PCM. The CMP and the CKP sensors share a 12 volt reference and low reference circuit. The CKP sensor consists of the following circuits:
-A 12 volt reference
-A low reference
-A CKP sensor 1 signal
-A CKP sensor 2 signal
OBDII Code P1351 Chevrolet - Ignition Control Module Circuit High Voltage - AutoCodes.com
P1351 Chevrolet Code - Ignition Control Module Circuit High Voltage

|Need More Information on the P1351 Chevrolet Code?

Need more information on how to fix the P1351 Chevrolet code? Get Access to Factory Service Manuals

|Need Help with the P1351 Chevrolet Code?

Get the P1351 Chevrolet code diagnosed by a professional: Find a repair shop in your area

|Code P1351 Chevrolet comments

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