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P0171 System too Lean (Bank 1)
To reset the service engine soon light on a 2004 GMC Envoy you can remove the ECU fuse. ECU stands for electronic control unit.
Indicative of problem with engine emission system
With an OBD2 scan tool.
gmc serra engine power reduce,can't drive no power
A flashing check engine light is usually an indication of a misfire
First disconnect the mass air sensor and see if the vehicle starts
Probably a vacuum leak. Do you have a code P0171 or P0174?
There are pages and pages and items that can cause a check engine light. You need to have it checked for codes with a scan tool. After repair light can be shut off with scan tool.
There are pages and pages and items that can cause a check engine light. You need to have it checked for codes with a scan tool. After repair light can be shut off with scan tool.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Disconnect battery and wait about 1 minute