marcstaz

Ok, here is what I pulled up on the vag. The other problem I am having is that the engine coolant temp is now tending to be higher than normal, even when its in the 40's outside and at highway speeds or idling after warm-up. Could this be from bad o2's or from bad cat's?? car does have 134k on it and pretty sure the cat's and o2's are original

17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent

16805 - Warm Up Catalyst; Bank 1: Efficiency Below Threshold
P0421 - 35-10 - - Intermittent

17530 - Oxygen (Lambda) Sensor Heating; B2 S2: Open Circuit
P1122 - 35-10 - - Intermittent

17548 - Oxygen (Lambda) Sensor: B2 S2: Internal Resistance too High
P1140 - 35-10 - - - Intermittent

16544 - Oxygen (Lambda) Sensor B2 S2: No Activity
P0160 - 35-10 - - - Intermittent

Any help on this???

My2ndS4

Clear the codes, and then see if they come back. Your bank 2 secondary O2 sensor is probably shot. Your Bank 1 primary O2 may also be shot. However, it's worth just trying to change the coolant temp sensor first.

There are other posibilities for the coolant being hot, but this sensor is cheap and easy to replace, so give it a shot.