Year of Manufacture *: 2001
Engine Code or CC *: AUM
( Optional ) Scanner Used: VCDS
Initial codes:
17705 Pressure drop between turbo and throttle valve.
16514 Oxygen sensor B1 S1 malfunction in circuit.
Initial checks showed a split breather pipe and as I took the 16514 code to be a sensor switching issue I thought I'd cracked it.
Next day light on again.
Roadtested with VCDS in situ, seemed to have good mixture control but engine temp was dropping off to 70 degC when car was moving. New thermostat fitted and temp stayed at 90-92 degC
Next day light back on again! 16514 code only now. Checked code in depth to realise on this car it signifies HEATER fault. Took a chance fitted new lambda sensor, guess what, next day light back on yet again.
Looking in measuring block 41 there is no value displayed for heater resistance. My thoughts are that there is a wiring loom fault, I can see some white deposits on the loom near the ECM but whether they signify a corroded wire I can only tell by opening the loom up.
Typically the owner works across the road from me, she is a very pleasant person but english is not her first language so communication is a little difficult at times, just the situation where I would like a straightforward fix!
Any ideas or magic bullets welcome.
Shaun.
