Volvo 850 GT "Check engine light on"
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Volvo 850 GT "Check engine light on"
I have a 1996 volvo 850GT. My check engine light keeps coming on every few days. I have taken it to the shop several times and have been told tests show no problems yet light come on a few days after being reset. Am I doing damage by driving the car?
Please Help!!!!!!!!!
Please Help!!!!!!!!!
Senior Member
Joined: Sep 2006
Posts: 5,340
Likes: 14
From: IPS, MA
RE: Volvo 850 GT "Check engine light on"
CEL has most likely been turned on for the following reasons if it keeps coming back:
- Retired O2 sensor(s); turbo models have 2 O2 sensors.
- Vacuum leak/Air:Fuel mixture problem that is making the O2 sensor putting out out-of-range signal.
- Misfire.
Visit a local AutoZone (or any parts shop that provides free OBD-II diagnostic service) and let them show you the code. Have them reset the system (deleting emissions-related codes is illegal in some states but the clerk could be decent enough to "fat-finger" the scanner), and see if the same code returns. This narrows down troubleshooting process.
I'll let others jump in.
JPN
- Retired O2 sensor(s); turbo models have 2 O2 sensors.
- Vacuum leak/Air:Fuel mixture problem that is making the O2 sensor putting out out-of-range signal.
- Misfire.
Visit a local AutoZone (or any parts shop that provides free OBD-II diagnostic service) and let them show you the code. Have them reset the system (deleting emissions-related codes is illegal in some states but the clerk could be decent enough to "fat-finger" the scanner), and see if the same code returns. This narrows down troubleshooting process.
I'll let others jump in.
JPN
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Joined: Sep 2004
Posts: 36,349
Likes: 45
From: Orlando, Florida
RE: Volvo 850 GT "Check engine light on"
ORIGINAL: JPN
CEL has most likely been turned on for the following reasons if it keeps coming back:
- Retired O2 sensor(s); turbo models have 2 O2 sensors.
- Vacuum leak/Air:Fuel mixture problem that is making the O2 sensor putting out out-of-range signal.
- Misfire.
Visit a local AutoZone (or any parts shop that provides free OBD-II diagnostic service) and let them show you the code. Have them reset the system (deleting emissions-related codes is illegal in some states but the clerk could be decent enough to "fat-finger" the scanner), and see if the same code returns. This narrows down troubleshooting process.
I'll let others jump in.
JPN
CEL has most likely been turned on for the following reasons if it keeps coming back:
- Retired O2 sensor(s); turbo models have 2 O2 sensors.
- Vacuum leak/Air:Fuel mixture problem that is making the O2 sensor putting out out-of-range signal.
- Misfire.
Visit a local AutoZone (or any parts shop that provides free OBD-II diagnostic service) and let them show you the code. Have them reset the system (deleting emissions-related codes is illegal in some states but the clerk could be decent enough to "fat-finger" the scanner), and see if the same code returns. This narrows down troubleshooting process.
I'll let others jump in.
JPN
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eliotb
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Aug 27, 2007 11:37 PM
