VW Beetle Oil & Check Engine Warnings Need Expert Fix

Had the same warning combination on my 2015 VW Golf TSI last month. The oil sensor and temp sensor warnings often appear together when there is a wiring issue rather than an actual oil pressure problem. The automotive sensor cluster in these VW engines shares common wiring harnesses. In my case, the connector pins for the oil pressure sensor were corroded, causing intermittent false readings. The oil gauge would work normally but still trigger warning lights. The repair involved cleaning the connector pins and replacing the engine temperature sensor assembly since moisture had gotten into the housing. This was not a serious mechanical issue, just an electrical one that needed attention to prevent false readings. The fact that your engine runs normally and shows no actual oil gauge issues matches my experience. Would recommend having the wiring connections checked first before replacing any sensors. These electrical gremlins are common on VW models from that generation when the harness connections start aging.

Thanks for sharing your Golf experience. Pretty similar to what happened with my Beetle two years ago. Same symptoms with multiple warning lights, and the car diagnostics also pointed to sensor issues. In my case, the temperature sensor was completely shot and needed replacement. Would you mind sharing what the repair cost in your case? My fix was around 280€ including labor, but prices might have changed since then. Has everything been working properly since your repair? I had to go back once because they missed a small wiring issue near the temp sensor connection, but after that second visit, no more warning lights.

Just wanted to follow up on the cost question. In my case, the repair bill came to 95€ total, which was much less than initially expected. The automotive sensor diagnostics revealed it was just a faulty engine oil temperature sensor connection, not a complete sensor failure like yours. The mechanic found and fixed a loose cable connection at the temp sensor plug. No parts replacement was needed, unlike your situation which required a new sensor unit. Been running perfectly since the fix, no more warning lights or false readings on the oil gauge. The engine temperature readings have remained stable and accurate after the repair. This confirms what I suspected, these warning lights often trigger from simple electrical connection issues rather than actual sensor failures. Much better to catch these problems early before moisture damage requires replacing the entire sensor unit.

Went back to the mechanic yesterday and got it sorted. The car diagnostics confirmed it was indeed the oil temperature sensor causing multiple warnings. Repair took about an hour and cost 180€ including parts and labor, cheaper than my previous sensor replacement. The mechanic showed me the old sensor unit which had visible corrosion on the connector pins. They also checked all nearby wiring while the sensor was out, found some wear on the harness insulation and wrapped it properly to prevent future issues. Started right up after the fix with no warning lights. Drove it hard for about 50km to make sure everything was working properly. All engine sensor readings stayed normal and no warning lights came back. Good to have this resolved without any major issues, these electrical gremlins can be nerve wracking but usually turn out to be simple fixes.