Recently the Engine Light came on & I've diag'd with VAG-COM, had 4 faults codes as follows:
16556 - Fuel Trim; Bank 1: System Too RichP0172 - 35-00 - -
17536 - Fuel Trim; Bank 1 (Mult): System too LeanP1128 - 35-10 - - - Intermittent
16518 - Oxygen (Lambda) Sensor B1 S1: No ActivityP0134 - 35-10 - - - Intermittent
01039 - Coolant Temperature Sensor (G2) 30-10 - Open or Short to Plus - IntermittentReplaced Coolant Sensor(£28), MAF(£56) & Bank 1 Lambda Probe(£78) all Parts from my local VW stealer. Problem now is the Lambda probe shows working on idle till move away & the voltage & signal drop to zero.
Acceleration is rough & the car is running lumpy. Am I missing something or is the Bank 1 supposed to switch off during normal driving?