hi guys got a light on the dash warning code po420. help
hi guys got a light on the dash warning code po420. help
P0420 - Catalyst System Low Efficiency, ie the cat is fooked, or one of the sensors. O2 sensors before and after can measure cat efficiency.
Used any nasty fuel lately? or been doing A LOT of very low duty cycle stufF? Maybe a good Italian tune could recover this?
I've had the emissions light pop up once on my 2.0T - steady, not flashing. Didn't have my Vaux-COM then so didn't see what codes were logged. I reset it by disconnecting the battery and it never came back. It had been very cold weather and I think it was maybe a 'glitch' with a sensor getting an odd reading or a blip allowing the fuelling to go out of range and trigger the light.
the reading also said track 1 does this mean the first sensor
what kit are you using?
Track one????
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