P0342 - CAMSHAFT POSITION SENSOR "A" CIRCUIT LOW

The CMP sensor (Camshaft Position Sensor) is an electronic device that is used in motors, in order to record the speed at which the camshaft rotates. Then this information is sent to the ECM (Engine Control module) who uses it to control the fuel injection, as well as the ignition time.

Retraction of the camshaft is detected by the CMP sensor, and in this way identifies a cylinder specifically. The position of the piston is also detected by the CMP sensor. If a fault occurs in this sensor, the ECM will not know when a valve opens or closes.

Diagnostic code P0342 OBDII indicates that the CMP sensor signal is low or does not have the necessary power

• Malfunctioning light on.
• Difficulty starting the engine.
• Power loss.
• High fuel consumption.

When DTC code P0342 is set OBDII means that one or more of the following faults has occurred:

• Cables or connectors of the Camshaft Position Sensor (CMP) may be in poor condition, causing a short circuit.
• CMP sensor defective.
• Cables that lead to the starter motor, may be worn or defective.
• Defective starter
• The battery may be in poor condition.

The steps for correct correction of fault code P0342 OBD2 are:

• Consult the TBS (Technical service bulletins). The solution to your problem may be known by the manufacturer.
• A low level of the battery can set the code, so check the level of charge.
• Check the system of cables that lead to the start. Look for corroded or defective cables. Make the necessary repairs or change.
• Check the status of the cables related to the CMP sensor. Also check the connector as it may have corrosion. If there are defective cables, replace them or replace the sensor.
• Check that the starter motor does not have excessive drainage.