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
