yakmatt

I have a 2002 S4 Avant with 103,000 miles. I'm not that mechanically knowledgeable so I am hoping i to get some advice here. My registration expires in September and I need to get a CT emission's test. No performance problems with the car. I've read some of the other posting on this subject so I know someone out there can give me a good plan of action. thanks in advance.

Over the last few months my Check Engine light has come on and the shop has told me these were the codes. Currently Check Engine light is not on.

February
17866 Exhaust Gas Temp Sensor 2 (G236): Short to ground p1458-35-00 - -
17539 Oxygen (Lambda) Sensor; B2 S1: Internal resistance too High P1131 - 35-10 - - - Intermittent
16805 Warm up Catalyst; Bank 1: Efficiency Below Threshold P0421 - 35-10 - - - Intermittent

March
17866 Exhaust Gas Temp Sensor 2 (G236): Short to ground p1458-35-00 - -
17539 Oxygen (Lambda) Sensor; B2 S1: Internal resistance too High P1131 - 35-10 - - - Intermittent
17521 Oxygen (Lambda) Sensor; B1 S1: Internal resistance too High P1131 - 35-10 - - - Intermittent
16805 Warm up Catalyst; Bank 1: Efficiency Below Threshold P0421 - 35-10 - - - Intermittent

June
17865 Exhaust Gas Temp Sensor 2 (G236): Open or Short to plus p1457-35-00 - - - Intermittent
17539 Oxygen (Lambda) Sensor; B2 S1: Internal resistance too High P1131 - 35-10 - - - Intermittent
16805 Warm up Catalyst; Bank 1: Efficiency Below Threshold P0421 - 35-10 - - - Intermittent

skamgdi

i have some of these also

17539 Oxygen (Lambda) Sensor; B2 S1: Internal resistance too High P1131 - 35-10 - - - Intermittent
16805 Warm up Catalyst; Bank 1: Efficiency Below Threshold P0421 - 35-10 - - - Intermittent


these seem to be the 02 sensor or the catalic converter hope its the sensors though ill get mine this weekend