P1345 - FAULT CODE P1345 - OBD2

POST UPDATED IN January, 2021

P1345 Code failures by brands

P1345 - AUDI: IGNITION AMPLIFIER, PRIMARY CIRCUIT 3 - SHORT TO GROUND

P1345 - GM (CHEVROLET/GMC): CAMSHAFT POSITION CORRELATION- CRANKSHAFT POSITION

P1345 - ISUZU: CKP/CMP SIGNALS - SIGNAL MALFUNCTION

P1345 - LEXUS: VARIABLE VALVE TIMING SENSOR - LH BANK - CIRCUIT MALFUNCTION

P1345 - MAZDA: POSITION SENSOR CAMSHAFT (CMP) - SIGNAL MALFUNCTION

P1345 - TOYOTA: VARIABLE VALVE TIMING SENSOR - LEFT BANK - CIRCUIT MALFUNCTION

P1345 - VOLKSWAGEN BMW: IGNITION AMPLIFIER, PRIMARY CIRCUIT 3 - SHORT TO GROUND

Description of DTC code P1345

A lot of vehicle manufacturers have implemented a variable camshaft timing system in the engine. Through this system, the camshaft is automatically delayed or over-advanced at certain speeds.

The CKP sensor(Crankshaft Position Sensor) is in charge of indicating the ECM (Engine Control Module) the position of the crankshaft concerning the TDC (Top Dead Centre) in the compression stroke in the cylinder. On the other hand, the CMP Sensor (Camshaft Position Sensor) is used. The information transmitted to the ECM is used to determine the best fuel injector timing.

The fault code P1345 OBDII is a manufacturer-specific code, although there is a slight difference in definition between each one. However, this code points to an ignition problem in all vehicles, and its establishment occurs when the correlation between CKP Sensor and CMP Sensor is not within the expected range or is not synchronized.

Symptoms of fault code P1345

  • The Check Engine lamp is on.
  • Difficult to start the engine.
  • The engine stops.
  • Above 1500 rpm, the engine is malfunctioning.

Causes of OBD2 P1345

The causes for the diagnostic code P1345 OBD2 may vary according to the manufacturer, they are the following:

  • Toyota vehicle manufacturers indicate that the variable valve timing sensor on the left bank has problems in its circuitry or perhaps in the sensor itself.
  • About the Audi manufacturer, it indicates that this code is caused by a power output of the ignition coil 3.
  • For its part, BMW suggests that this code identifies an ignition failure for cylinder number 2, which produces a fuel cut.
  • Chevrolet, GMC, and other brands show that this code is caused by a slip in the valve timing chain, resulting in a malfunction of the CKP or CMP Sensor.

Possible solutions of the DTC code P1345

To solve the DTC code P1345 OBDII, you must take into account the following:

  • As a first step, it is necessary to consult the available Technical Service Bulletins (TSB).
  • Check the good condition of the wiring of the Cam Position Sensor circuit, as well as the sensor itself. Make the necessary repairs.
  • Verify that the timing chain tensioner is not worn. If this is the case, make the corresponding adjustments.

 

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