o2 sensor problem. Please Help!
Thread Starter
Advanced
Joined: Jan 2007
Posts: 74
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From: big one
o2 sensor problem. Please Help!
o2 sensor proble on my 1996 lt4 corvette and I have heard bc i used the spark plugs from autozone thats why the code comes up?Any help would be very nice thanks!
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
The 96 (OBDII) is different from the rest of the C4's as it has 4 O2 sensors. You have 2 precat senors and 2 postcat sensors. The PCM sees all 4, but the first two are the important ones. The other two monitor the cat function.
A spark plug is a spark plug and doesn't matter where you purchase them as long as they are correct for your engine. Many things can cause the O2 sensors to report errornous readings.
What problem are you having with them (rich, lean) and which one(s)?
A spark plug is a spark plug and doesn't matter where you purchase them as long as they are correct for your engine. Many things can cause the O2 sensors to report errornous readings.
What problem are you having with them (rich, lean) and which one(s)?
Pro
Joined: Aug 2004
Posts: 623
Likes: 1
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
I don't have a refrence to the 96 codes...as for what they mean. But, you state that both precat sensors and one post cat sensors is giving the codes.
A scan would help, so we could see the O2 voltages and BLM.
Do you have an exhaust leak before the sensors?
Are the connections good?
Is the wiring good?
A FSM (factory service manual) would help diagnose the problem along with a scan tool. Not much help if you don't have either. But I would make sure the sensors are in the exhaust pipe good and the connection is tight and the wires are not burn on the exhaust shorting the circuits. You should have heated O2 sensors as well...stock.
disconnect the battery for a minute and reconnect and start the engine and see if the codes come back. If so, you do have a problem.
A scan would help, so we could see the O2 voltages and BLM.
Do you have an exhaust leak before the sensors?
Are the connections good?
Is the wiring good?
A FSM (factory service manual) would help diagnose the problem along with a scan tool. Not much help if you don't have either. But I would make sure the sensors are in the exhaust pipe good and the connection is tight and the wires are not burn on the exhaust shorting the circuits. You should have heated O2 sensors as well...stock.
disconnect the battery for a minute and reconnect and start the engine and see if the codes come back. If so, you do have a problem.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
I don't have a refrence to the 96 codes...as for what they mean. But, you state that both precat sensors and one post cat sensors is giving the codes.
A scan would help, so we could see the O2 voltages and BLM.
Do you have an exhaust leak before the sensors?
Are the connections good?
Is the wiring good?
A FSM (factory service manual) would help diagnose the problem along with a scan tool. Not much help if you don't have either. But I would make sure the sensors are in the exhaust pipe good and the connection is tight and the wires are not burn on the exhaust shorting the circuits. You should have heated O2 sensors as well...stock.
disconnect the battery for a minute and reconnect and start the engine and see if the codes come back. If so, you do have a problem.
A scan would help, so we could see the O2 voltages and BLM.
Do you have an exhaust leak before the sensors?
Are the connections good?
Is the wiring good?
A FSM (factory service manual) would help diagnose the problem along with a scan tool. Not much help if you don't have either. But I would make sure the sensors are in the exhaust pipe good and the connection is tight and the wires are not burn on the exhaust shorting the circuits. You should have heated O2 sensors as well...stock.
disconnect the battery for a minute and reconnect and start the engine and see if the codes come back. If so, you do have a problem.
also, tell us how your car is running?-black smoke coming out of exhaust?
- poor idle ?
- sluggish or bogging acceleration ?
If both your pre-cat O2 sensors are truely shot, I would expect that you engine is running very poorly....
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Thread Starter
Advanced
Joined: Jan 2007
Posts: 74
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From: big one
Car seems to run fine it just that my service soon light comes on and i dont know why it does.I will go to autozone on friday and get the codes and double check on the prob thaks guys for the help. Chad
