Fault code P0344 – a step-by-step guide to diagnosing and fixing it

Error code P0344 is displayed and the check engine light is on - what does this mean?

DTC P0344 is triggered by the OBD/EOBD system when an intermittent or irregular signal is detected from the camshaft sensor (bank 1, sensor A). This trouble code indicates problems with the camshaft position sensor or its signal transmission. With various manufacturers, this fault code can also be referred to as "Camshaft Position Sensor A Circuit Intermittent".

What causes can this error code have?

• Defective camshaft sensor
• Damaged or corroded sensor cable
• Loose or dirty plug connections
• Defective camshaft pulse wheel
• Worn or stretched timing chain
• Faulty engine control unit (ECU)
• Mechanical problems on the camshaft
• Oil or dirt on the sensor
• Electromagnetic faults

What symptoms occur in parallel with fault code P0344?

• Starting problems: The vehicle is difficult to start or does not start at all
• Erratic idling: The engine runs irregularly at idle speed
• Loss of power: Reduced engine power, especially at higher engine speeds
• Jerky engine: Uneven engine running while driving
• Increased fuel consumption: Poorer fuel efficiency due to incorrect ignition times
• Exhaust problems: Increased emission levels or black smoke from the exhaust

How to fix the problem of fault code P0344?

• Repairing fault code P0344 requires a systematic diagnosis of the camshaft positioning.
• Replace the camshaft sensor completely and also replace the seal to prevent further failures
• Check all cable connections to the sensor, repair damaged cables or replace the complete cable set
• Clean plug connections on the sensor and control unit, treat with contact spray and tighten firmly
• Check the camshaft pulse wheel for damage and replace the entire wheel if it is defective
• Check timing chain for wear and replace if stretched, including tensioners and guide rails
• Test engine control unit for defects and repair if necessary or replace with a functional unit
• Check the camshaft for mechanical damage and overhaul the entire shaft if the bearings are damaged
• Clean the sensor thoroughly with brake cleaner and remove oil and dirt from the mounting area