Hi

is there any way to test that a MAF sensor is actually working properly.

I see when they go up for sale it says "full working MAF sensor", so how do you tell?

Many Thanks
Paul

 

with the ignition on you should have a signal voltage of 0, with the car at idle it should be 0.3 - 4.5 volts. If there is a problem then the code PO101, P0102 or P0103 will be stored.

DTC PO101 - MASS AIR FLOW

DTC PO102 - MASS AIR FLOW SENSOR
CIRCUIT LOW INPUT

DTC PO103 - MASS AIR FLOW SENSOR
CIRCUIT HIGH INPUT

 

Forgot about this one

DTC P1141 - MASS AIR FLOW Sensor CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT

 

Just to check you could have these codes stored with out the CEL lit?

 

CEL light is all about emmisions and not all codes will cause the light to come on, at least not going by my experiences but I could be wrong as I am no expert.

 

P00031 code so not MAF its the front 02 sensor