Fault code P0339 – a step-by-step guide to diagnosing and fixing it

Error code P0339 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected an intermittent failure of the crankshaft sensor (bank A). This DTC P0339 indicates that the control unit is temporarily receiving no or an irregular signal from the crankshaft sensor, which affects the engine control.

What are the possible causes of this error code?

• Defective crankshaft sensor (CKP sensor)
• Damaged or corroded wiring to the sensor
• Loose or dirty plug connections
• Defective crankshaft sprocket or pulse disk
• Faulty engine control unit (ECU)
• Excessive air gap between sensor and sprocket
• Metal shavings or dirt on the sensor
• Vibrations due to defective engine mounts

What symptoms occur in parallel with fault code P0339?

• Starting problems: The vehicle is difficult or impossible to start
• Engine misfires: Irregular engine running and jerky driving style
• Loss of power: Reduced engine power while driving
• Check engine light: Continuous or intermittent illumination of the warning light
• Engine stalls: Sudden stalling of the engine while driving
• Poor throttle response: Delayed response when accelerating

How can the problem with error code P0339 be rectified?

• Repairing this trouble code requires a systematic approach to identify the exact cause.
• Replace the crankshaft sensor completely and set the correct air gap of 0.5-1.2 mm to the spider
• Check all cable connections to the sensor, repair damaged cables or replace the complete cable set
• Clean plug connections, treat contacts with contact spray and screw tight
• Inspect the crankshaft spider for damage and repair the entire crankshaft in the event of defects
• Thoroughly remove metal chips and dirt from the sensor and sensor area
• Check engine bearings and replace defective bearings to eliminate excessive vibrations
• In the event of repeated failures, diagnose the engine control unit and replace or reprogram if necessary