check engine light

volvo850-mike · Post by **volvo850-mike** » 08 Jul 2005, 17:25

Mine just came on tonite. It's a '95 850 turbo. The car seems to be running the same as before. Where should I start? Would that diagnostic device on the motor be able to tell me anything and if so is there somewhere that explains how to use it? Thanks for any help...Mike

White850Turbo · Post by **White850Turbo** » 09 Jul 2005, 06:12

This explains how to use the diagnostic connector and you can reference them using the links under the DTC codes section here.

volvo850-mike · Post by **volvo850-mike** » 10 Jul 2005, 16:40

the code was 212 front oxygen sensor. Should I just replace it or should I check other things before replacing it? As I said the car doesn't seem to be running any different. Any advice?

smithy · Post by **smithy** » 11 Jul 2005, 14:08

How's your fuel economy? I noticed a marked dip in mine when I got a CEL for a front O2 sensor. Replaced the sensor and air filter and I was back to 30 MPG highway.

jamjelly42 · Post by **jamjelly42** » 12 Jul 2005, 09:23

what if the engine light continue to come on and the diagnoist test continue to show 611 or leakage, but we have check for leakage, there is none, and have replace the fuel cap. This is on a S70. Thanks