Question

What is code P0340?

Engine code P0340 means “Camshaft Position Sensor A Circuit Malfunction,” indicating a defective camshaft position sensor circuit.

It is the camshaft position sensor that analyzes the rotational speed of the engine camshaft. It also tracks the shaft’s correct position while rotating. The camshaft position sensor signals the powertrain control module (PCM), which makes use of the sensor data to set the timing for fuel injection systems and ignition.

Interrupting the camshaft position sensor’s signal confuses the engine’s accurate timing and can lead to performance issues, like misfiring or below-optimal fuel-to-air mixtures. Soon, the PCM will log the code P0340, and the check engine light will illuminate to warn the driver of this issue.

What are the symptoms of a P0340 code?

These are signs that you can observe when the PCM logs this code:

• The check engine illuminates
• Decrease in fuel economy
• Loss of power
• Engine idling or stalling
• Hard start or no start
• Engine knocking
• Transmission shift issues
• Limp mode

What can cause a P0340 code?

These are some reasons why the code shows up in your car:

• Circuit issues
• Failing or damaged camshaft position sensor
• Incorrect sensor installation
• Issues with the internal engine timing parts
• Defective camshaft position sensor reluctor wheel
• Faulty camshaft position sensors
• Slush and dust buildup in the sensor
• Regular wear-out of the camshaft position sensor

How to fix code P0340

These are the steps you can follow to fix the code:

• Replace or repair the camshaft position sensor circuit wiring
• Replace or repair the camshaft position sensor circuit connector
• Replace the camshaft position sensor
• Replace the crankshaft position sensor
• If misfire codes are present, do a tune-up of the vehicle before changing the camshaft position sensor
• Replace or reprogram the PCM

How much does it cost to fix a P0340 code?

The cost to fix the P0340 code can vary depending on the type of repair required. The following are the various costs that can be incurred:

• Camshaft position sensor replacement: $100-$300
• Crankshaft position sensor replacement: $190-$250
• Timing chain or belt replacement $1,000-$2,500
• PCM: $1,500-$2,000

Can you drive with a P0340 code?

Though you can drive with engine code P0340, we don’t recommend it. As the code implies an issue with the camshaft position sensor (CMP) circuit, driving with it can lead to problems with proper ignition, fuel injection, and engine timing.