VW Caddy Oil Pressure Warning: Sensor Issue Fix Guide

I had a very similar issue with my 2003 VW Golf with the 1.6L gasoline engine. As someone with moderate car repair experience, I initially tried basic diagnostics but ended up taking it to a workshop. The car symptoms matched yours exactly, oil pressure warning, speedometer warning light, and stored error codes. The workshop confirmed it was related to the engine temperature sensor system. After running car diagnostics, they found the main issue was a damaged cable connection to the temp sensor, which was causing incorrect readings. The repair involved replacing the wiring harness connection to the temperature sensor. Total cost was 95€ including labor. Since the fix, all warning lights cleared and the system has worked perfectly. Before suggesting more specific solutions, could you share: Which engine variant is in your Caddy? What error code is stored? Does the warning appear more frequently when the engine is cold or warm? Have you noticed any actual oil pressure or temperature issues? This information would help determine if your issue matches what I experienced with my car sensor system.

Thanks for your helpful insight. My Caddy has the 1.6L FSI gas engine. Last service was done 3 months ago at 42525km. The stored error code is P0522. The oil pressure warning mostly appears when the engine is warm, especially during longer drives. The mechanic at my last service checked the actual oil pressure with testing equipment and found it normal. I checked the engine sensor wiring visually but couldnt spot any obvious damage. Would the temperature sensor replacement be something I could handle myself or is it best left to professionals considering the car diagnostics needed?

Based on the P0522 error code and your description, your situation sounds very similar to what I experienced with my Golf. Since you mention the oil pressure tests normal but the warning appears during warm conditions, this strongly points to an oil sensor system issue rather than actual pressure problems. On my Golf, accessing the oil temperature sensor was straightforward, located near the oil filter housing. However, simply replacing the sensor didnt solve the problem completely. The wiring harness connection was the real culprit, which wasnt visible during a basic inspection. A key point regarding the P0522 code: while it indicates an oil pressure sensor circuit low voltage, the issue often stems from either: Faulty oil pressure sensor, Damaged wiring between sensor and ECU, Corroded connector pins Though the sensor replacement itself is doable at home with basic tools, I recommend professional diagnosis first because: 1. The actual fault might be in the wiring or connections 2. The error codes need proper clearing after repair 3. Oil pressure system issues need thorough testing to ensure safety My repair cost breakdown was: Diagnostic scan: 25€, Wiring repair: 45€, New sensor: 25€ Consider having a workshop perform proper diagnostics first, it could save money by identifying the exact issue before replacing parts.

Thanks for all the details everyone. After comparing my symptoms with similar cases and getting your feedback, I think I'll take it to a professional workshop first for proper car diagnostics on the oil sensor system. While I usually like doing repairs myself, I agree its worth getting an exact diagnosis given the oil temperature and pressure monitoring is a critical safety system. I called a local VW specialist and they quoted 35€ for full diagnostics including checking the temp sensor wiring and connections. If it does turn out to be just the sensor, I might attempt the replacement myself since the access seems straightforward on the 1.6L FSI engine. Will update once I know more about whether its the temperature sensor itself or a wiring issue causing the P0522 code. Really appreciate the detailed cost breakdown and repair suggestions, helped me understand what to expect.