Passat Hybrid Starting Issues Point to Faulty Switch

Had similar issues with my 2018 VW Arteon Hybrid. The engine start problems and rough running turned out to be more than just an ignition switch issue. After thorough diagnostics at the repair shop, the problem was traced to a faulty fuel pump relay and a corroded fuse box connection. The car would sometimes fail to start on first key turn, and when running, the engine would suddenly cut out, especially during transitions between electric and combustion power modes. The repair involved replacing the main fuse box assembly and fuel pump relay. This was classified as a serious electrical issue that could have led to complete system failure if left unaddressed. The starting issue symptoms matched yours exactly, normal dashboard lights but inconsistent engine response. The repair required specialized diagnostic equipment for hybrid systems. A standard mechanic might miss the underlying electrical issues by focusing only on the mechanical ignition switch components. Would strongly suggest finding a shop certified in hybrid vehicle repairs, as these symptoms often indicate electrical system problems rather than mechanical failures. Looking at your mileage and model year, this could be showing similar signs of electrical wear that many VW hybrids develop around this service interval.

Thanks for the detailed breakdown of your Arteon repair. My starting issue sounds very similar, especially the part about inconsistent engine response and normal dashboard behavior. Quick follow up, what was the total cost for your fuel pump relay and fuse box repairs? Also curious if youve had any starting issues since the fix? My local VW specialist quoted 850€ for initial diagnosis and potential ignition switch replacement, but based on your experience, I should probably prepare for additional electrical work. I will definitely look for a hybrid-certified shop now rather than a general mechanic. The symptoms match too closely to ignore the electrical system connection you mentioned.

Following my visit to a certified hybrid specialist, the starting issue was completely resolved. The total repair was actually simpler than expected, it turned out the main fuse box had a defective connection that was causing intermittent power delivery to the ignition system. The fix cost 52€ for parts and labor. The car electronics have worked flawlessly since the repair. No more problems with the ignition coil or starter motor performance. The key now turns smoothly, and the engine responds immediately every time. This confirmed my initial suspicion that the car ignition system needed professional attention from someone who understands hybrid vehicle electronics. Looking back, the investment in having a hybrid specialist diagnose the problem saved both time and money compared to your quoted 850€. These electrical gremlins can be tricky, but once properly identified, the fix is often straightforward.

Just had my car back from the certified hybrid specialist, what a relief! Found a highly-rated shop that specializes in hybrid systems after reading the advice here. The mechanic spotted the issue quickly, turned out to be a faulty connection in the ignition system causing the intermittent starting problems. Total cost came to 780€ including parts and labor. More than just a simple ignition switch replacement, they had to repair some corroded wiring and replace a relay in the starter motor circuit. The car starts perfectly now, no more rough running or stalling issues. The key turn feels normal again and the engine starts reliably every time. Definitely worth finding a hybrid-certified mechanic who knew exactly what to look for. Thanks for steering me away from a general repair shop, could have wasted time and money on unnecessary parts replacements. For anyone else with similar starting issues in their hybrid, get it checked by a specialist. These electrical problems can cascade if left unfixed.