P0349 - CAMSHAFT POSITION SENSOR "A" CIRCUIT INTERMITTENT BANK 2

The Camshaft Position Sensor (CMP) provides the PCM (Powertrain Control Module) with a voltage signal indicating the position of the camshaft. This information also determines if the signal from the CKP (Crankshaft Position Sensor) is correct. Altogether it is used for fuel injection timing and ignition timing.

DTC P0349 OBDII indicates that the CMP sensor input signal is intermittent. This is due to electrical circuit faults. This code is set for engine bank number 2.

• Check Engine lamp illuminated.
• The engine does not start or stalls when starting.
• Rough engine operation.
• Acceleration problems.

The reasons for setting the P0349 OBD2 diagnostic code are as follows:

• The wires or connectors related to the CMP Sensor may have defects.
• The CMP sensor power circuit may be shorted or open.
• There may be an internal short to ground in the Camshaft Position Sensor power circuit.
• CMP Sensor signal circuit may be shorted.
• The Camshaft Position Sensor may be faulty.

To troubleshoot the P0349 OBDII fault code you must do the following:

• We recommend as a first step to consult the TSB (Technical Service Bulletins).
• Inspect the Camshaft Position Sensor along with its wires and respective connectors. Look for wear, corrosion, or burns. Repair as necessary.
• Disconnect the CMP Sensor and check that the resistance of the CMP Sensor is as indicated in the service manual. If you determine an internal sensor short, replace it.
• Verify that the signal from the Camshaft Position Sensor is correct. You can use an oscilloscope or a DVOM to determine this value. Compare the result with that specified by the manufacturer. Repair as necessary.
• Disconnect the CMP Sensor and PCM to check that the circuit resistance is not shorted. If there is a short, check the connectors for damage.