Q5 Oil Pressure Warning Points to Faulty Temp Sensor

As someone with some hands-on experience with these systems, I dealt with a very similar issue on my 2021 Audi Q3. The oil temperature sensor started giving false readings, triggering warning lights just like yours. The car diagnostics revealed it was actually a simple connection issue, the temp sensor cable had worked loose and was causing intermittent readings. The repair was straightforward, costing 95 Euro to fix the faulty cable connection to the temperature sensor. The good news is that these warnings often activate as a precaution, and the engine usually has multiple safeguards. Still, it is important to address oil system warnings promptly to prevent any potential engine damage. Could you share: Current mileage on your Q5? Does the warning appear right after starting or during driving? Have you noticed any unusual engine temperatures? Any recent oil changes or maintenance work? This information would help determine if your case matches what I experienced or if it might be a different oil system component causing the issue. Since these sensors are part of a complex monitoring system, having proper car diagnostics done at a workshop is the safest approach. They can properly test the temperature sensor and check the entire oil pressure system to rule out other issues.

Thanks for the detailed response about the sensor issue. My Q5 has 164311 KM on the odometer and the last service was just 2 months ago. The warning appears about 5-10 minutes into driving, not immediately at startup. The automotive sensor readings seem erratic, sometimes showing normal oil temperature, other times spiking high. The temperature sensor symptoms you described match mine exactly. Good to know it might just be a connection issue rather than complete sensor failure. Will have the workshop check the wiring first before replacing any parts.

Good news that your symptoms match my experience with the loose sensor connection. The erratic temperature readings you mentioned are especially telling, that is exactly how my Q3 behaved before the fix. A properly working oil temperature sensor should show stable, gradual changes. Given your Q5s mileage and the timing of the warnings (5-10 minutes into driving), this further suggests a sensor-related issue rather than an actual oil pressure problem. When the automotive sensor connection is loose, it often takes some engine vibration and heat before the faulty readings begin. Since your last service was recent, have the workshop specifically examine the work done around the oil system. Sometimes disturbing the area during routine maintenance can inadvertently affect sensor connections. The car diagnostics should quickly confirm if the temperature sensor circuit is the culprit. The repair cost might be similar to what I paid (95 Euro) if it is just the connection. Even if the entire oil temperature sensor needs replacement, it is still a relatively straightforward fix compared to actual oil pressure problems. Keep monitoring those readings, but based on the similarities to my case, this sounds more like a sensor communication issue than a mechanical problem.

Thanks for the detailed information about the Q3 sensor fix. My Q5 has 164311 KM on the odometer and the last service was just 2 months ago. The warning appears about 5-10 minutes into driving, not immediately at startup. The automotive sensor readings seem erratic, sometimes showing normal oil temperature, other times spiking high. The temperature sensor symptoms you described match mine exactly. Good to know it might just be a connection issue rather than complete sensor failure. Will have the workshop check the wiring first before replacing any parts. Really hoping it is just a loose connection like in your case, would save both time and money compared to a full oil sensor replacement. Did you notice any other warning lights or issues after your repair was completed? Just want to make sure I know what to expect once they fix mine.