P0340: Camshaft Position Sensor Circuit Malfunction

What Does The P0340 Code Mean?

This P0340 code indicates that a problem was detected in the camshaft position sensor circuit.

Since it says circuit, that means the problem could lie in any part of the circuit – the sensor itself, the wiring, or the PCM. Don’t just replace the CPS (camshaft position sensor) and think that will definitely fix it.

What Are The Symptoms Of The P0340 Code?

Symptoms can include:

• Hard starting or no start
• Rough running / misfiring
• Loss of engine power

What Are The Potential Causes Of The P0340 Code?

A code P0340 could mean one or more of the following has happened:

• A wire or connector in the circuit could be grounded/shorted/broken
• The camshaft position sensor may have failed
• The PCM may have failed
• There exists an open circuit
• The crankshaft position sensor may have failed

How Can You Fix The P0340 Code?

With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:

• Visually inspect all the wiring and connectors in the circuit
• Check for continuity in the circuit wiring
• Check the operation (voltage) of the camshaft position sensor
• Replace the camshaft position sensor as required
• Check the crankshaft position circuit as well
• Replace circuit wiring and/or connectors as required
• Diagnose/replace the PCM as required

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> Camshaft Position Sensor
>>> Crankshaft Position Sensor
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> ECU
>>> Dorman 86689C 399 PC Automotive Electrical Repair Kit

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Check This Video For Reference

P0340 Infographic - 1 Minute Summary

Reference Sources

Diagnostic Trouble Code (DTC) Charts and Descriptions for P0340 – Page 61.