New here and need help with codes.
Hi there. I'm a newb on this site and wanted to say hello.
I own a 98 A6 Quattro 2.8L.
I just replaced my pre-cat O2 sensors about a week ago and the check engine light came on. With my buddy's VAG-COM I received these codes:
Address 01: Engine Labels: 078-907-551-AHA.lbl
Part No: 4D0 907 551 AH
Component: 2.8L V6/5V MOTR AT D01
Shop #: WSC 23261
5 Faults Found:
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-10 - - - Intermittent
16535 - Oxygen (Lambda) Sensor B2 S1: Signal too Low
P0151 - 35-00 - -
16515 - Oxygen (Lambda) Sensor B1 S1: Signal too Low
P0131 - 35-00 - -
17604 - Oxygen (Lambda) Sensor Heater Circuit: B1 S1: Electrical Malfunction
P1196 - 35-00 - -
17605 - Oxygen (Lambda) Sensor Heater Circuit: B2 S1: Electrical Malfunction
P1197 - 35-00 - -
Readiness: 0000 0000
Address 08: Auto HVAC Labels: 4B0-820-043-MY1.lbl
Part No: 4B0 820 043 G
Component: A6-Klimavollautomat D61
Shop #: WSC 42006
1 Fault Found:
01273 - Fresh Air Blower (V2)
17-10 - Control Difference - Intermittent
We reset the codes and last night the CEL came back on. I know my secondary air Injection pump is bad since last year but the CEL has always gone off. This one stays on.
What could it be? What is the fresh air blower?
Thanks in advance.