Q: Saturn vue 2005 check engine light most of the time P0172 errors.

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Kinda started out me just going in to the auto repair shops “ARS” , to turn of the check engine light. Lead me to $1200 in repairs no fix. We did plugs, etc..., oxygen sensor and one more sensor and the light keeps coming on and off. Most the time it is a generic P0172.

I think I am closing in on chasing it again. Possible new plugs, EVAP and a new throttle body. Would love to see the light resolved.

My car has 309000 miles.
My car has a manual transmission.

P0172 means the fuel system is too rich; rich beyond the ability of the closed loop system to compensate. It might be a vacuum leak, a mass air flow sensor, or a fuel pressure regulator problem. At that age it could even be leaking fuel injectors. But don’t run out and buy all those parts yet. Fixing a car by replacing parts until the problem is solved can get very expensive very quickly. You need to have a proper diagnostic process. You can get the car checked out at your convenience by contacting YourMechanic. They can send a technician to your home or office to check out your Saturn and let you know what is the solution.

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