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OBD 2 - O2 sensor 850

posted by  someone claiming to be Austin T5 on  Tue Apr 19 07:19 CST 2005 [RELATED]

I have two Volvo 850's (855 T5, 854 GLT). I am using Alex Pepper's OBD-2 software and the GLT shows both O2 sensors, however, the T5 shows only 1 sensor.

I have no codes but am getting bad gas mileage. I cleaned the MAF and the MAF connection with contact cleaner. Plugs and air cleaner are new. Tire pressure is good.

Could the lack of the second sensor being detected by the OBD-2 software indicate a bad O2 sensor, even thought I am not getting any codes?

Thanks!







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OBD 2 - O2 sensor 850

posted by  Hamfisted on  Tue Apr 19 15:33 CST 2005
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Yeah either the O2 sensor is unplugged or the harness is damaged. Without the two inputs I believe the ECU defaults to a rich setting, and that will hurt your gas mileage. But it is odd you aren't getting a DTC code. Which sensor does it see?



Mike
'95 850T








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OBD 2 - O2 sensor 850

posted by  someone claiming to be Austin T5 on  Wed Apr 20 13:43 CST 2005 [RELATED]

I see Bank 1....no Bank 2. I haven't taken a look to see if it's unplugged. I'll do that. No codes are stored according to the software and I have no CEL on.







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