I'm new to this forum and astras and could do with some help. I recently bought an 04 Astra Sport (Mk 4) 1.6 16v Twinport and took it to the garage for a once over and to get a bunch of stuff done to it (brake pads, ARB links, shocks, timing belt).
Since getting it back and taking it on a couple of 50+ mile runs its started playing up big time. Initially the emmisions light came on and a pedal test threw up a P0136 fault which I believe is an O2/lamda sensor high voltage.
After further driving (another 90 mile round trip) the car began running very rough towards the end of the trip and the fault codes were P0136 plus P0300 and P0301-4.
Other symptoms are:
- high idle speed when cold (1100rpm)
- poor running, misfiring, juddering increasing with temp
- takes a long time to come up to temp even then is still well below vertical - reading about 80.
I guess I should start by cleaning /changing the lamda sensor but I'd really like an opinion from someone who knows a bit more than I do before I start taking things apart. I'd also really appreciate it if someone could definitively tell me where it is. Any opinions would be much apreciated before I have to go back to the garage and drain my bank account again.