Question about 2003 Saturn ION
Check the wires from the O2 sensors for worn insulation and bare spots. They are probably rubbing on the body somewhere and sending false signals to the computer. Hope this helps.
Posted on Feb 22, 2012
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Posted on Jan 02, 2017
is this a 4 or 6 cylinder?
if a 4 cylinder it will only have 2 o2 sensors
V6 will have 4 o2 senors which the sensor will be the right side of the engine first sensor.
1st sensor on exhaust, I recommend if you change one change all, as this will make the computer when it rechecks the system you have all clean/fast responding sensors.
if you have a slow response it means the sensor is dirty and not reading well, which is usually caused by minor misfires that the engine computer dismisses, so a tune up would be recommended too.
Posted on May 06, 2009
SOURCE: 1998 Saturn SL2 engine light
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
Posted on Sep 22, 2009
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?
Posted on Feb 28, 2010
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