Possible causes

– Faulty front heated oxygen sensor
– Ignition misfiring
– Faulty fuel injectors
– Exhaust gas leaks
– Incorrect fuel pressure
– Faulty Mass Air Flow (MAF) sensor

When is the code detected?

– Fuel injection system does not operate properly.
– The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Excessive Fuel Consumption

P0175 Description

With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).

P0175 Information for specific makes

P0175 INFINITI
P0175 NISSAN
P0175 ACURA
P0175 HONDA
P0175 BMW
P0175 CHRYSLER
P0175 DODGE
P0175 JEEP
P0175 FORD
P0175 HYUNDAI
P0175 KIA
P0175 LEXUS
P0175 TOYOTA
P0175 SCION
P0175 MAZDA
P0175 MITSUBISHI
P0175 SUBARU
P0175 AUDI
P0175 VOLKSWAGEN
P0175 GMC
P0175 CHEVROLET
P0175 CADILLAC
P0175 BUICK
P0175 PONTIAC
P0175 SATURN