Questions & Answers for: check engine light 2004 gmc

Check Engine Light? Have a 2004 GMC Envoy with a ?Check Engine? light that stays on. Mechanic says it due to a faulty ?Fuel Sensor?, but the only information I can find is for ?Oxygen Sensors?. He ...

...check engine light remains illuminated. Diagnostics revealed codes: P1133 and P0128. P1133 points to a heated oxygen sensor and P0128 indicates a possible defective thermostat. The O2 sensor was ...

...check engine light. The dealer usually wants to replace the throttle assembly which is very expensive and usually un nessesary. I have had a lot of succes with just cleaning the throttle plates real ...

...You need to let us know what the fault code(s) is. Did anyone ever give this information when they were working on the vehicle? There are many reasons for the check engine light to be turned

panel on my 2004 GMC ENVOY You need to go to a auto parts store like Autozone, they will read the fault codes for free and provide you with a printout of the reason for the check engine light being on

...check engine light has been on forever but, had it checked and nothing was detected. Help! If the check engine light is on its on for a reason you might want to take it to a dealership mechanic to ...

envoy 2004 xuv the check engine light come on and the code is po128 More than likely the thermostat is stuck open. You should replace the thermostat and the temp sensor. See picture below for location

...GMC ENVOY LOCATED??? how can i find it? It should be mounted on the side of the throttle body. But if it is bad you should also have a check engine light on and a stored trouble code for the

...check engine problem in envoy 2005 model circuit low voltage bank 1 sensor 2 check engine light when coming hot while in running A code P0137 may mean that one or more of the following has happened: ...

light turned green, hit the gas and car didn't move. Restarted engine and it worked. Any light's lit on the instrument cluster ? Reduced engine power - check engine light - yellow wrench symbol etc..