Hello all
Need some help, my younger brothers Starlet has failed its MOT on the O2 sensor reading too much oxygen, 1.23 on its first test, 1.18 on its retest. the limits are 0.97-1.03
i have given the car a full engine service i.e - oil, oil filter, air filter, fuel filter, spark plugs, and i had fitted new O2 sensor as the cars only done 55k miles but i figured the O2 sensor might be the original one fitted and ran injetor cleaner additive before mot re-test incase the injectors were abit gummed up, car runs great tho? but sadly it still failed the retest, its a EP91 1998 1.3 Starle