joeyvaz

I am replacing my O2 sensors and 1 EGT sensor this week because I scanned my 2001 allroad and found the following:


17865 - Exhaust Gas Temp Sensor 2 (G236): Open or Short to Plus
P1457 - 35-10 - - - Intermittent
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-00 - -
17521 - Oxygen (Lambda) Sensor; B1 S1: Internal Resistance too High
P1113 - 35-00 - -
16805 - Warm Up Catalyst; Bank 1: Efficiency Below Threshold
P0421 - 35-10 - - - Intermittent
17539 - Oxygen (Lambda) Sensor; B2 S1: Internal Resistance too High
P1131 - 35-10 - - - Intermittent

Readiness: 0010 0001

Is there a site or tech article explaining which bank is which? I really need to know which EGT is side 2 because I am only ordering the one I need. I am replacing all 4 O2 sensors since 3 seem to be shot at this point.

Thanks,
Joe

joeyvaz

btw, can the cat inefficiency code be caused by one of the O2 or EGT sensors? Or are my cats on the way out?

nowlings

Check with your audi dealer before you spend money on the EGT temp sensors. There is AUDI TSB on 2001 Allroads where a simple ECU Reflash with software update will stop the check engine light from coming on with that fault code. Only certain VIN number ranges were affected with a specific ECU part number. We had this procedure done in Sacramento and it fixed our CEL issue with no reoccurence after 1 year. Good Luck on the O2 sensors the left pre-cat one is real fun to change.