P1351 – OBD-II

P1351 OBD-II DTC Description

• P1351 - High voltage in the ignition control module circuit.

The P1351 Transmission Diagnostic Trouble Code (DTC) is a manufacturer code. The repair process varies by make and model.

The ignition control module (or ICM for its abbreviation in English) has independent power and ground circuits, having different internal and external circuits that make up its entirety.

The ICM itself is responsible for monitoring the CKP timing signal when the engine is already running, detecting that this signal is passing from the CKP sensor to the ICM in the CKP sensor signal circuit 2. This signal is typically used to determine the correct cylinder . pair to initiate the ignition coil start sequence, displaying a P1351 OBDII trouble code if there are any failures or issues in that particular area.

What does the P1351 OBD2 DTC mean?

Trouble Code P1351 OBDII means that there is a malfunction or a general problem with the ICM, finding that this particular code varies a lot depending on the make of your vehicle. An example of the above are the following values ​​for the P1351 OBD2 DTC:

• For Ford vehicles, this code indicates a malfunction in the dealer's IDM circuit.
• For Isuzu vehicles, this code means that in addition to the ECM, the ignition control module, mechanical failure, or wiring errors are failing.
• For Toyota and Lexus vehicles, this code means that the valve timing change sensor is faulty.

OBD-II DTC Datasheet

Audi P1351: Camshaft Position (CMP) Sensor Bank 1 - Performance Range/Problem Details: You can ignore this DTC, just clear the fault memory

Ford P1351: Ignition Diagnostic Monitor Circuit Details: With the engine running, the PCM detects a malfunction in the IDM circuit from the distributor.

GM General Motors P1351: ICM Circuit High Input Conditions Details: With engine speed less than 250 RPM and ignition control ON, the VCM detects that the ignition control circuit has a voltage greater than 4.90 V. Isuzu P1351: Ignition control module (ICM) - high signal voltage Details: Possible causes include wiring, ignition control module, ignition system, mechanical failure, ECM Toyota P1351 and Lexus P1351: Variable Valve Timing Sensor - Right Bank - Range/Performance Problem Possible Causes: ECM or Camshaft Timing Mazda P1351: Engine Control Module (ECM) - Ignition Loss Diagnostic System Lockout. Possible cause: ECM. VW – VolkswagenP1351: Camshaft Position (CMP) Sensor Bank 1 Range / Performance Problem Details: Ignore this DTC, Erase Fault Memory

Symptoms of a P1351 trouble code may include:

• Check the engine light or check the engine light on the dashboard.
• Car start errors.
• The engine suddenly stops.
• Rough idle, more when operating temperature is reached.

Because the OBDII DTC varies depending on your vehicle, the symptoms can be very specific and vary from one another.

Cause code P1351

• The ignition control module is faulty.
• ICM harness is open or shorted.
• Poor electrical connection to ICM.
• Bad contact in the battery. The battery cables may be damaged.

P1351 OBDII Solutions

• Consult technical service bulletins or certified repair manuals to troubleshoot your vehicle with this code.
• Gather and repair any loose or corroded wiring directly in and around the ICM, cleaning as necessary.
• Replace ignition control module.
• Verify that the voltage supplied to the CKP and CMP sensor is indeed the one specified by the manufacturer. If the readings are not adequate, check the connectors and wiring of these vehicle components and repair as necessary.

P1351 Fault Code Found And Fixed

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NOTE. This information is provided for informational purposes only. It is not intended to be used as a repair recommendation and we are not responsible for any action you take on any vehicle. All information on this site is protected by copyright.