Evening, My sister is down on holiday with her MK4, with complaints of bad economy and MIL Light!
Did a fault code scan -
16518 - Oxygen (Lambda) Sensor B1 S1: No Activity
P0134 - 35-10 - - - Intermittent
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-00 - -
16555 - Fuel Trim; Bank 1: System Too Lean
P0171 - 35-00 - -
16523 - Oxygen (Lambda) Sensor B1 S2: Response too Slow
P0139 - 35-10 - - - Intermittent
Im inclined to replace Number 1 sensor, assuming the other faults are caused by this, im not sure about the last fault though.
Any other ideas than number 1 02 sensor here? Cheers.
