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Author Topic: 2nd 02 sensor reading - BAM engine , 8N0 906 081 BQ  (Read 6949 times)
20VTMK1
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« on: November 06, 2013, 10:59:02 AM »

Hi All ,

I am getting a reading of 20deg C on the 2nd 02 sensor (Cat temp) , as a result the readiness bit for the cat temp is sitting at 0.

I am inclined to believe that this is messing about with the trims , 630 deka's (2.3 % idle , 0.8 % PT)

I have read the posts on the 2nd 02 control and I do sort of concur with the symptoms .

No error codes , just a low reading that doesn't change ..

Any comments or experience .

Thanks
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20VTMK1
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« Reply #1 on: November 11, 2013, 12:14:30 PM »

Hi ,

Just to report back .

I changed the 02 sensor .. Trims on idle dropped right away. Doubt its a co-incidence .

Also , car is more spirited on part throttle now .

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