VW Fox Camshaft Sensor Causing Starting & Stalling Issues

Experienced similar symptoms on a 2010 VW Polo 1.6 TDI. The camshaft position sensor was failing, causing inconsistent ignition timing and engine misfires. Initial symptoms matched yours, difficult starts, stalling at idle, illuminated check engine light. The root cause was a damaged encoder wheel on the camshaft. When the crankshaft sensor stopped receiving proper signals, the engine management system couldn't maintain correct timing. Diagnosis revealed metal debris had damaged the sensor surface. This was a serious issue requiring immediate attention. Left unfixed, it could have led to complete engine failure or extensive damage to other components. The repair involved replacing both the encoder wheel and camshaft position sensor to ensure proper signal transmission. The fix resolved all symptoms, engine runs smoothly now, starts consistently, and maintains stable idle. While sensor failure is common on these engines, regular maintenance helps prevent debris buildup that often causes these issues. Would recommend getting it diagnosed soon, as continuing to drive with these symptoms risks additional engine damage.

Thanks for sharing that experience. I had almost identical issues with my VW Fox last winter, same starting troubles and check engine light problems. My mechanic also found it was the camshaft position sensor after running sensor testing. Do you remember roughly what the repair cost in your case? Mine came to around 380€ including labor, but Im wondering if prices vary much. Also curious if youve had any other engine control issues since getting it fixed?

The total repair for my VW Polo came to 695€, which included replacing both the faulty encoder wheel and camshaft position sensor. This was higher than your cost because the encoder wheel damage required more extensive labor. Since fixing the camshaft position sensor issue last year, the engine control system has performed flawlessly. No more stalling, rough idling, or ignition timing problems. The check engine light hasnt returned either. The higher repair cost in my case was worth it since addressing the root cause prevented potential long-term engine damage. The damaged encoder wheel was causing incorrect signals to the crankshaft sensor, which could have led to more serious issues if left unrepaired. Regular maintenance checks have helped prevent any recurring sensor failure issues. The engine now maintains stable performance in all driving conditions.

Finally took my Fox to the shop last week. The mechanic confirmed it was indeed a camshaft position sensor issue, just like we discussed. Repair cost was exactly 380€ with parts and labor. Honestly, a relief it wasnt the encoder wheel problem you experienced, saved me some money there. The whole repair process took about 3 hours. They ran complete sensor testing and also checked the ignition timing to ensure everything was properly calibrated. The engine control system is working perfectly now, no more stalling, starts right up every time, and the check engine light has stayed off. Really glad I didnt wait longer to fix it. The mechanic mentioned the sensor failure could have caused bigger problems if left unchecked. Money well spent considering the potential damage it could have caused. Feels good to have a reliable car again.