VW Taigo Oil Warning Lights Signal Sensor Problems

I faced a similar issue with my 2020 VW T-Cross last year. As someone with some experience working on cars, I initially thought it might be more serious, but it turned out to be quite straightforward. The oil sensor warnings can definitely be nerve-wracking, especially when the engine seems to run normally. In my case, the oil gauge readings were inconsistent, and the engine temperature display was acting up. After checking the basics like oil level and quality, I took it to a workshop. The technician found that the oil temperature sensor connection had worked loose over time. There was a faulty wire connection at the plug, causing intermittent signal issues. The total repair cost was 95€, which covered diagnostic time and fixing the cable connection. Before suggesting more specific solutions, could you share: Current mileage on your Taigo, The exact error code showing up, Whether the warning appears when the engine is cold or at operating temperature, If you notice any pattern with the warning light (constant or intermittent) This information would help determine if your issue matches what I experienced or if it might be something different.

Regarding my mileage, I am at 80332km and had the last service done about a month ago. The error code showing is P0520, and the warning light tends to appear after driving for about 15-20 minutes, typically when the engine reaches normal operating temperature. The warning is quite inconsistent, sometimes flashing briefly before disappearing, other times staying on for longer periods. The automotive sensor behavior seems very similar to what you described, especially with the inconsistent oil temperature readings. Its interesting that you mention the loose connection, as I noticed the warnings sometimes disappear after hitting a bump in the road, which could indicate a similar wiring issue. Did your mechanic need to access the temp sensor from under the car, or was it reachable from above? Just trying to understand what kind of repair process I might be looking at.

Thanks for providing those details. Yes, the symptoms you describe are nearly identical to what I experienced with my T-Cross, especially the part about the warnings changing after hitting bumps. That behavior is a classic sign of a loose connection affecting the oil temperature sensor readings. In my repair, the technician accessed the sensor from above after removing the engine cover. The car sensor connector was located near the oil filter housing. The fix involved cleaning the connector pins and securing the wiring harness properly with new clips to prevent future movement. One thing I noticed before the repair, the engine temperature gauge would sometimes show unusual fluctuations, which disappeared after fixing the connection. This happens because the ECU receives inconsistent signals from the automotive sensor system. Given your mileage and the P0520 code, plus the timing of the warnings at operating temperature, I would bet you are dealing with the same electrical connection issue rather than a failed sensor unit. The repair should be straightforward and similarly priced to what I paid. Quick tip: while waiting for the repair, keep monitoring your actual oil level manually with the dipstick, just to be on the safe side. The engine protection systems will shut things down if there is a real oil pressure problem, so intermittent warnings are typically sensor-related rather than mechanical.

The symptoms you describe match my situation well. I will move forward with having the wiring connection checked first, since everything points to a sensor-related electrical issue rather than a mechanical problem. The detail about accessing the temp sensor from above is helpful, I will mention the P0520 code and possible wiring issue when booking the appointment. Good to know its likely not a complex repair requiring major disassembly. Your experience with the inconsistent engine temperature readings and oil gauge behavior matches what Im seeing. I will definitely keep checking the oil level manually as suggested while waiting to get this fixed. Based on your repair cost, this should be a much more manageable fix than I initially feared. The fact that my engine runs normally and the warnings are intermittent does suggest its just the sensor connection rather than an actual oil pressure problem. Will schedule this repair soon and update once its resolved. Thanks for sharing your firsthand experience with such a similar issue.