My 2002 Saturn vue was running fine, until the check engine light came on...I took it to my local pep boys and they ran the codes, came up p0300 and 0302, said it was more then likely a valve problem and it would have to be looked at by the dealer...currently it is at my local GM dealer waiting to be looked at, not sure what it is? I have been googling what the codes could mean..
SOURCE: Check engine light 2005 Saturn Vue
the scan tool that you are using will not read codes from all of the modules. take the car to a gm dealer to have it checked with a tech2
SOURCE: 2004 Saturn VUE (M/T) STEADY service engine soon light
SOME TIME PCM GET A VOLTAGE SPIKE.OR ELECTRICAL INTERFERENCE WILL CAUSE SERVICE LIGHT TO COME ON WITH NO CODES.IF IT KEEP HAPPENING TAKE IT TO DEALERSHIP TO CHECK IT OUT.
SOURCE: my check engine light on my 07 saturn ion keeps
1174 is a lean code, and would have to been set first because it will not set when the 0300 is there. 0300 is a random misfire, because it read after the lean code, it was probably caused by the lean condition. 1st check for vacuum leaks from hoses or intake gaskets, you cal listen for a hissing sound, or spray carb cleaner around intake systems, a change in rpm will be noticed when spraying near a vac leak. other probable causes are the upstream 02 sensor, map sensor, or fuel delivery problems. does the vehicle idle porly, or does it miss at the top end?
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