ian10

can someone please tell me what this sensor dose, my car has a hesitation around 2000 rpm then runs fine after that. I've changed, plugs,maf front lambda sensor, ewage sti
thanks in advance

PeeVee

iTrader: (1)

The rear O2 sensor sniffs the exhaust gasses after they have passed through the catalysts to make sure that the cats are working efficiently/correctly.

Neither the cat nor the sensor have an effect on fueling or ign, so would not cause a hessitation.

Phil

ian10

thanks for that
any other ideas