Don't overcomplicate the task in hand
 

My daughter's A6 has been running with the oil level/temperature sensor on for a while now, something she seems to have got used to and doesn't notice it.
She left her car at my house for a couple of days as she is away to London, so I decided to give it a service and investigate the fault.

There were 2 faults that kept popping up

Address 01: Engine Labels: 038-906-019-AVF.lbl
Part No: 038 906 019 LL
Component: 1,9l R4 EDC G000SG 4912
Coding: 00002
Shop #: WSC 02325
VCID: 6CDDE46E1C90D69
WAUZZZ4B74Nxxxxxx AUZ7Z0C2xxxxxx

1 Fault Found:
18062 - Please check DTC Memory of Instrument Cluster
P1654 - 35-10 - - Intermittent
Readiness: 0 0 1 1 1

-------------------------------------------------------------------------


Address 17: Instruments Labels: 4B0-920-xxx-17.lbl
Part No: 4B0 920 981 J
Component: KOMBI+WEGFAHRS. VDO D12
Coding: 00440
Shop #: WSC 00001
VCID: 2D5B296AE70A1F1
WAUZZZ4B74Nxxxxxx AUZ7Z0C2xxxxxx

1 Fault Found:
00562 - Sensor for Oil Level/Temperature (G266)
29-00 - Short to Ground


I decided to Google and see what the problem could be after speaking with a mechanic and being told it was possibly a broken wire.
Google came up with several answers and one was the bonnet microswitch, so I stripped it out and checked it was working properly and it was. More Googling where broken wires and water ingress seemed to be the most common fault and there were a few who had changed the sensor only to still have the problem. Onto Ebay and I found a new non OE sensor for £9.99 plus postage, TPS were quoting £65.50 plus VAT for the genuine Hella part. I decided that the £9.99 sensor could be either a bargain or it could be more bother than it's worth and went to TPS and bought the real deal. I drained the oil and changed the sensor, new filter and oil and started it up and low and behold the light was out. Another scan with Vag-Com to delete the faults and both are now clear.

I wonder how many with the same problem bought the cheap sensor only for the fault to remain or come back after a week or two