tonyjmoore
14-09-2006, 06:11 PM
Help!! I have a 2001 polo petrol 1.4 with AUA engine code. Recently the engine management light has been coming on,have taken to local garage who read the fault on a SNAP -ON reader,the result showing as-17586
(P1178)Heated Oxygen Sensor(HOS2)1,Bank 1,Pump Current-open circuit.
Probable Cause -open circuit HOS2. Have checked all connections to lambda sensors -1 on downpipe and 1 on cat'.-all seem o k. Light goes off occasionally and then returns.Engine runs fine apart from when stone cold when there is a slight misfire which soon clears.My nearest main dealer wants nearly £100 just to put it on their machine and report! I'm fairly sure it is one of the lambda sensors playing up but do not know which.. any ideas would be gratefully received Thanks :confused: :confused:
(P1178)Heated Oxygen Sensor(HOS2)1,Bank 1,Pump Current-open circuit.
Probable Cause -open circuit HOS2. Have checked all connections to lambda sensors -1 on downpipe and 1 on cat'.-all seem o k. Light goes off occasionally and then returns.Engine runs fine apart from when stone cold when there is a slight misfire which soon clears.My nearest main dealer wants nearly £100 just to put it on their machine and report! I'm fairly sure it is one of the lambda sensors playing up but do not know which.. any ideas would be gratefully received Thanks :confused: :confused: