Help please! I need an advice on my 2000 A6 2.8 quattro,(245K)failed emissions test in Ontario,for CO% on 2500RPM.Limit 0.70 and reading is 1.89.on idle is 0.04 reading.HC ppm`s OK,Dilution is valid.Now,check engine light is on and the codes(6) are as follow:
1114-Bank1-sensor2-Internal resistant to high
1118-O2 Sensor Heater circuit Bank1 sensor2 open
1122-O2 sensor Heater Circuit Bank2 sensor2 open
1140-Bank2-sensor2-Internal resistance too high
P0138-O2 sensor Circ.bank1-sensor2-high voltage
p0160-O2 sensor Circ.bank2-sensor2-no activity detected
Car is running OK only is shaking a bit when idling in drive(traffic light stop etc.)
When I bought car previous owner told me that he cleaned cats.!!???and I see clamps after cats.What could be a problem.I`ve never seen so many o2 fault codes on a car.Do you think it`s wiring problem as he maybe did not recconect O2s properly when he put cats back after cleaning!!!????Any help would be appreciated.Thank you!!!!