VW Passat Hybrid Stalling After Bad Repair Job

A camshaft position sensor failure matches those symptoms perfectly. My 2020 VW Arteon Hybrid had similar issues, stalling engine, rough idling and serious power loss. The automotive sensor diagnostics revealed a damaged wiring harness connecting to the camshaft sensor. The connector pins were corroded and making intermittent contact. This timing issue was causing the engine management system to receive incorrect position data. The repair involved replacing both the sensor assembly and the wiring harness section. The job requires specific knowledge of hybrid systems since accessing the sensor means carefully working around high-voltage components. This is not a minor issue, incorrect camshaft timing data can potentially cause engine damage if left unresolved. The ECU deliberately reduces power as a protective measure when it detects inconsistent sensor signals. Key diagnostic signs that confirm sensor failure: Hard starting but engine cranks normally, Significant power loss across all RPM ranges, Multiple timing-related fault codes, Unstable idle speed, Problems worsen as engine warms up Suggest having a certified hybrid specialist diagnose the exact issue, as symptoms can sometimes mimic other problems.

Thanks for sharing your experience with the Arteon. I had nearly identical issues with my Passat, the check engine light, stalling engine at idle, and terrible power delivery. The crankshaft and camshaft position sensors were reading incorrectly, causing major timing problems. After my repair, the engine misfire issues completely disappeared and performance returned to normal. Would you mind sharing what the repair cost in your case? Also curious if youve had any related problems since getting it fixed.

Had the repair done last week and glad I can confirm its working perfectly now. The automotive sensor diagnostic confirmed what we suspected, it was indeed the camshaft position sensor causing the rough idling and power issues. The fix was actually simpler than expected. The mechanic found a faulty connection in the wiring harness going to the sensor. Total cost came to 95€ for repairing the cable connection. No need to replace the entire sensor unit as originally feared. Since the repair, the check engine light has stayed off and the engine runs smoothly without any misfire issues. Power delivery is back to normal and the unstable idle is completely gone. No timing-related problems have occurred in the week since the fix. If the symptoms match what we both experienced, getting the sensor connections checked is definitely worth investigating. Much better to address these timing issues early before they potentially cause more serious engine damage.

Thanks for the advice. Finally got the car fixed and wanted to share my experience in case others run into similar issues. Took it to a certified hybrid specialist who immediately spotted the problem. The check engine codes pointed to crankshaft and camshaft position sensor issues. The wiring harness had significant wear causing intermittent signals. Total repair came to 280€, more than just a connection fix since they had to replace the entire sensor assembly and a section of the harness. The timing issues were worse than initially thought. Been driving for 2 weeks now and the car runs perfectly. No more hard starts, power loss is gone, and the engine idles smoothly. The check engine light hasnt returned. Smart decision to get it checked by a proper specialist rather than risk more damage. Thanks again for steering me in the right direction with the automotive sensor diagnosis. Saved me from potentially much costlier repairs down the road.