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Camshaft position sensor bank 1


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Which engine, how many miles.

 

 

 

Common Symptoms

Error Code P0344 can be tricky, as sometimes, it may not be preceded by any symptoms at all, other than the Check Engine light. If there are symptoms, it usually would be:

  • Engine cranking but doesn’t start
  • Hard starting
  • Engine dies and doesn’t restart
  • Engine lacks or loses power
  • Rattling sound (metallic noise) coming from the engine

Possible Causes

There are many reasons and factors for a vehicle to have this code. Some of the most common causes are:

  • Intermittent open in the power supply circuit to the CMP sensor
  • Intermittent short to ground in the power supply circuit to the CMP sensor
  • Intermittent short to 5V from the signal circuit to CMP sensor
  • Intermittent short to ground in the signal circuit to the CMP sensor
  • Intermittent open in the signal circuit to the CMP sensor
  • Intermittent open in the ground to the CMP sensor
  • Damaged CMP tone ring
  • CKP making intermittent signals occasionally

Other possible causes can be:

  • Dead or weak battery
  • Faulty starter motor
  • Poor electrical wiring connection to CMP sensor
  • Short in starting system circuit

How to Check

When this code is saved on the vehicle, technicians conduct their troubleshooting by inspecting the CMP and CKP sensors and their respective wirings. They will check the wires and look for signs of damage, such as chaffing, rubbing, burnt areas, or melted plastics.

Then, they will proceed to check the connectors and terminals.

These troubleshooting steps can usually tell technicians the source of the problem.

 

How to Fix

Depending on the cause of the error code, there are multiple ways to fix it, which include:

  • Cleaning the electrical connections to the CMP sensor
  • Replacing the faulty CMP sensor
  • Replacing the faulty CKP sensor
  • Replacing chaffed, melted, or damaged wirings
  • Replacing weak or dead battery

Intermittent signal from the CMP may mean many different issues that can be potentially serious. If left unaddressed for extended periods of time, the vehicle will start stalling and may not start again, or fail to start after being shut down and left.

 

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