gareth29
30-05-2017, 12:04 PM
Help, I'm trying to diagnose whats wrong here. Ive plugged in the VCDS and here is the screen shot of the fault codes and a pic of the O2 sensor.
http://i1349.photobucket.com/albums/p756/gareth291262/20170529_132714_zpsswtmpxmi.jpg (http://s1349.photobucket.com/user/gareth291262/media/20170529_132714_zpsswtmpxmi.jpg.html)
http://i1349.photobucket.com/albums/p756/gareth291262/20170529_131607_zpsctpyhceu.jpg (http://s1349.photobucket.com/user/gareth291262/media/20170529_131607_zpsctpyhceu.jpg.html)
I've tested for a supply to the heater and a supply to the sensor and these are fine. Also the resistance of the heater seems ok.
There is a grey/brown deposit on the sensor, but its not thick and Im not sure whether this could affect its operation.
On the MOT the details were:
On the 1st fast idle test CO was 0.88% and the limit is 0.3%. Lamda 0.982. HC 70 ppm.
On the 2nd fast idle test CO was 1.05% and the limit is 0.3%. Lamda 0.974. HC 28 ppm.
On the natural idle test CO was 0.39% and the limit is 0.5%.
Just whipped the plugs out so here they are cyl 1-3 left to right. No. 1 smelt strongly of fuel (faulty injector?) but otherwise they would clean up. I turned the engine over with the injectors exposed and the all seemed to be working consistently.
Not sure what all the deposits on no 3 mean - burning oil?
http://i1349.photobucket.com/albums/p756/gareth291262/20170529_191846_zps9lvxewdq.jpg (http://s1349.photobucket.com/user/gareth291262/media/20170529_191846_zps9lvxewdq.jpg.html)
I also checked the heater wire back to the ecu and there was continuity so all looks good there.
Do I just replace the sensor? or could it be something else?
Thanks for looking.
http://i1349.photobucket.com/albums/p756/gareth291262/20170529_132714_zpsswtmpxmi.jpg (http://s1349.photobucket.com/user/gareth291262/media/20170529_132714_zpsswtmpxmi.jpg.html)
http://i1349.photobucket.com/albums/p756/gareth291262/20170529_131607_zpsctpyhceu.jpg (http://s1349.photobucket.com/user/gareth291262/media/20170529_131607_zpsctpyhceu.jpg.html)
I've tested for a supply to the heater and a supply to the sensor and these are fine. Also the resistance of the heater seems ok.
There is a grey/brown deposit on the sensor, but its not thick and Im not sure whether this could affect its operation.
On the MOT the details were:
On the 1st fast idle test CO was 0.88% and the limit is 0.3%. Lamda 0.982. HC 70 ppm.
On the 2nd fast idle test CO was 1.05% and the limit is 0.3%. Lamda 0.974. HC 28 ppm.
On the natural idle test CO was 0.39% and the limit is 0.5%.
Just whipped the plugs out so here they are cyl 1-3 left to right. No. 1 smelt strongly of fuel (faulty injector?) but otherwise they would clean up. I turned the engine over with the injectors exposed and the all seemed to be working consistently.
Not sure what all the deposits on no 3 mean - burning oil?
http://i1349.photobucket.com/albums/p756/gareth291262/20170529_191846_zps9lvxewdq.jpg (http://s1349.photobucket.com/user/gareth291262/media/20170529_191846_zps9lvxewdq.jpg.html)
I also checked the heater wire back to the ecu and there was continuity so all looks good there.
Do I just replace the sensor? or could it be something else?
Thanks for looking.