Mazda Protege
Mercedes-Benz CL-Class
Toyota T100

What does a P0170 fuel trim malfunction bank 1 mean for 1998 Mazda Protege?

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Wiki User
2007-11-29 23:17:39

probably your pcv valve or front O2 sensor (if your lucky).

Could be the Mass Airflow Sensor. It basically means the fuel is

not properly running through the motor. May also notice RPM issues

with that problem.

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