Hi all
Its been a while, but that is because my belowed A2 has worked perfectly until some weeks ago.
In short, i am getting codes for the rear lambda probe heating circuit
17513 - Bank 1, probe 2 heating current circuit short to positive
17526 - Bank 1, probe 2 heating current circuit open circuit
Some weeks ago the alternator rectifier went bad causig strange things to happend.
I changed the alternator but the MIL will not go away.
I also getting codes for the rear door locks and i have studied the workshop manual current flow diagram and i have found that they share the same earth connection (249, Earth connection -2-, in interior wiring harness) as the fuel pump relay but i can't find that connection, could anyone please tell me where it is? The fuel pump relay powers the O2 sensor heater circuits.
I must add that the rear door locks are working, i can't see anything wrong about them
I dont have VCDS but a cheaper iCarSoft CR Pro.
When i connect the scanner and looking at the O2 sensors live data they acting very differently, the front sensor are laying steady at 80 ohms and it stays ON always. The rear sensor resistance are fluctuating at 100 - 300 kohms and are turned ON and OFF alternating witch is correct according to the workshop manual
The scanner always pointing to the rear sensor but as long as they share the same power supply i would think both sensors would behave strangley if there was a problem with the power supply. Both sensors are new and i have changed the fuel pump relay and the ECU but no luck yet.
When you look at the error codes, isent it a bit strange that there is both open circuit and short to positive on the same sensor, mabe both heater circuits acting uncorrectly and the scanner can't tell them apart?
Looking strictly at the scanner result its the front heater circuit that dosent work propperly as it always stays in ON condition, but i getting codes for the rear sensor only
This have given me many sleepless nights so if anyone out there have any information i would bee wery interested to hear about it
Arildoss
Its been a while, but that is because my belowed A2 has worked perfectly until some weeks ago.
In short, i am getting codes for the rear lambda probe heating circuit
17513 - Bank 1, probe 2 heating current circuit short to positive
17526 - Bank 1, probe 2 heating current circuit open circuit
Some weeks ago the alternator rectifier went bad causig strange things to happend.
I changed the alternator but the MIL will not go away.
I also getting codes for the rear door locks and i have studied the workshop manual current flow diagram and i have found that they share the same earth connection (249, Earth connection -2-, in interior wiring harness) as the fuel pump relay but i can't find that connection, could anyone please tell me where it is? The fuel pump relay powers the O2 sensor heater circuits.
I must add that the rear door locks are working, i can't see anything wrong about them
I dont have VCDS but a cheaper iCarSoft CR Pro.
When i connect the scanner and looking at the O2 sensors live data they acting very differently, the front sensor are laying steady at 80 ohms and it stays ON always. The rear sensor resistance are fluctuating at 100 - 300 kohms and are turned ON and OFF alternating witch is correct according to the workshop manual
The scanner always pointing to the rear sensor but as long as they share the same power supply i would think both sensors would behave strangley if there was a problem with the power supply. Both sensors are new and i have changed the fuel pump relay and the ECU but no luck yet.
When you look at the error codes, isent it a bit strange that there is both open circuit and short to positive on the same sensor, mabe both heater circuits acting uncorrectly and the scanner can't tell them apart?
Looking strictly at the scanner result its the front heater circuit that dosent work propperly as it always stays in ON condition, but i getting codes for the rear sensor only
This have given me many sleepless nights so if anyone out there have any information i would bee wery interested to hear about it
Arildoss