Stefan_G

Hi, Did you fix the issue ? I have a similar problem on my high mileage 2009 Audi A4 B8 allroad 3.0 TDI CCWA engine. The car had 2 oil pressure switch sensors replaced by my local garage without any luck (error code not clearing). As Gareth mentioned earlier on the post are these sensors programming-in parts ? The oil pressure was tested with a gauge & computer tool and was confirmed OK. Could this be a mechanical fault like engine wear due to running with low oil pressure, oil pump or / and the oil pressure control valve N428 ? The car at the moment is at an auto electrician for troubleshooting / checking wires etc. Many thanks ! Stefan error code: 5581 - Oil Pressure Switch P164A 00 [036] - Implausible Signal Intermittent - Not Confirmed - Tested Since Memory Clear Freeze Frame: Fault Status: 00000001 Fault Priority: 2 Fault Frequency: 5 Mileage: 307591 km Date: 2023.01.31 Time: 16:34:23 Engine speed: 0.00 /min Normed load value: 0.0 % Vehicle speed: 0 km/h Coolant temperature: 77 °C Intake air temperature: 20 °C Ambient air pressure: 1000 mbar Voltage terminal 30: 11.920 V Unlearning counter according OBD: 40 Crankshaft speed (RPM): 0.0 /min Vehicle speed: 0.00 km/h Vehicle voltage terminal 30: 11660 mV Accelerator position: 0.00 % C Eng Ds T u Raw: 2448.2 mV Co Eng st: COENG_READY Engine oil temperature: 11.0 °C