hello,
driving home the other day down the motorway and suddenly the engine management light and check emissions came on the dash. i've had it plugged in and its given the code p0420. the car has a sports cat fitted but thats been on over 6 months without issue. I'm hoping changing a lambda will sort the issue but unsure which one to change pre or post cat any ideas? thanks
driving home the other day down the motorway and suddenly the engine management light and check emissions came on the dash. i've had it plugged in and its given the code p0420. the car has a sports cat fitted but thats been on over 6 months without issue. I'm hoping changing a lambda will sort the issue but unsure which one to change pre or post cat any ideas? thanks