Hello....help please to solve a permanent engine mgt alarm on my 3 litre Elite estate, 1996, 75k miles.
A professional checker indicates the air inlet temperature sensor. Testing it reveals no problems - the resistance varies with temperature OK.
The paperclip test shows the same thing plus an oxygen sensor issue.
I've just MOT'd the car. The emissions readings were OK but the lambda reading is 1.028 [ie only just inside the upper limit of 1.03]. This is a change from previous year's readings which were virtually 1.
The car starts and runs fine - no issues at all and no change to the performance as far as I can tell.
I've just had lots of other expense on it [air-con pump, exhaust, tyres...] so I don't want to be buying lambda sensors from Vauxhall quoted at £125 each unless I am very sure they are at fault. I have also found that the connectors are very, very difficult to get at - at least with my mitts....
I'm off on holiday in it soon so I want to fix this quickly - preferably without recourse to the pro's and lot's of cost...
Any ideas please?