Monitor Strategy

Related DTCs

P0171: Fuel trim lean P0172: Fuel trim rich

Required Sensors/Components (Main)

Fuel system

Required Sensors/Components (Related)

A/F sensor, Mass air flow meter, Crankshaft position sensor

Frequency of Operation



Within 10 seconds

MIL Operation

2 driving cycles

Sequence of Operation


Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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