I had a check engine light come on. it was for a misfire. I replaced the plugs and wires and had the computer reset. When I tried to get the car inspected I was told the computer had not completed the registration of the EGR, Cat Converter and the O2 sensor. I drove 250 miles but still had the problem. I had it reset again and have drove 700 miles but still have the problem. There are no lights now and it runs like a dream. Do u have any ideas? Thanks
SOURCE: 1998 Saturn SL2 engine light
Possible Causes
The following are malfunctions that could cause a rich condition:
^ Fuel pressure too high. Perform fuel pressure test.
^ Leaking fuel injector(s). - Perform pressure leak down test.
^ Vacuum leak around the MAP sensor grommet.
^ Oxygen sensor contamination.
^ Restricted exhaust or air intake.
^ Fuel Vapor Canister saturated with fuel.
IMPORTANT: If the front oxygen reading voltage is above 600 mV and the rear HO2S is above 600 mV all the time, the O2 sensors are probably not
at fault.
SOURCE: Transmission Fluid Temperature Sensor Circuit
I have a 2004 that did not pass the state of Illinois emission test.
The code came back 0711. The check engine light comes on
occassionally but will go out and won't come back on for weeks at a time. Does anyone have a clue?
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