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Checking an engine code requires an On-Board Diagnostics code reader and a list of the possible engine codes for the vehicle in question. After attaching an OBD code reader to the interface terminal on the engine, any engine codes can be checked against the list to dete...


A check engine light code is a code pulled from an on-board diagnostics scanner that determines the source of the problem in a vehicle. A local auto part store, auto repair shop or resources online can help locate the problem from the code.


Two common causes for the check engine light coming on are that the ozone sensor needs replaced or the gas cap is damaged or missing. Other reasons why the check engine light may come on include a bad catalytic converter or a faulty mass airflow sensor. The best way to ...


The easiest way to look up engine service light codes is to search for the code online and find a free listing of codes. You can also look them up in a shop manual for that model of car.


To read engine trouble codes for newer cars, find the 16-pin OBD II diagnostic plug and plug in the code reader or scan tool. Turn the car on but do not start the engine. The process varies depending on the code reader, but press the Read Code option for most devices. F...


Common Ford engine error codes include P0171 and P0174. If the check engine light comes on, it is typically one or both of these engine error codes that are generated. They are lean fuel condition codes that mean the engine is sucking too much air or not getting enough ...


Engine code P0171 means that an oxygen sensor in a vehicle’s engine has detected too much oxygen in the exhaust. It is often caused by intake air leaks, faulty fuel injectors and exhaust gas leaks.