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Q: car works fin engine light on code P0172

asked by on

how i can fix i cant pass emission test

My car has 118000 miles.
My car has an automatic transmission.

A: Hi there: The error code you're referr...

Hi there:

The error code you're referring P0172 indicates that there is too much gasoline being detected in the exhaust gases exiting the combustion chamber. The ECU uses a number of instruments, such as the mass air flow sensor (MAF), oxygen sensors, and manifold absolute pressure (MAP) to monitor the air-fuel ratio of the engine. In many cases, each or any of those components listed might be dirty, faulty or have bad connections that are causing this rich situation. It might be a good idea to contact a mobile mechanic and have them complete a check engine light inspection; so they can download hard to access trouble codes that will indicate which parts are in need of cleaning or replacement - so that you can pass emissions.

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