I realise this is an old thread but just wanted to check if this was ever resolved? I'm getting error code ECM-2670 on a 2011 XC90 D5 (Injector power stage, cyl 1 - Signal too high). After an initial attempt to clean the old terminals I've replaced them (in injector 1). This has not resolved the issue but it is now intermittent.
I would like to completely rule out wiring before going down the injector replacement route.
(Long-winded background story below)
I've been trying to diagnose a slightly rough idle (causing intermittent steering wheel vibrations strong enough to make the keys jingle at times) After the first attempt to clean the old terminals it ran smoothly for a few glorious minutes and acceleration and power delivery was smoother...then whatever the problem is returned and it went rough again. After replacing the terminals it's now random, on my 40min commute I'll feel it change several times and the error code will come back (I have an ebay VIDA/Dice rig and clear the error code each time).
One other point of note is after spending a fair amount of time trouble-shooting this issue and not seeing any error codes at all in VIDA I bit the bullet and took it to a local Indie Volvo specialist and paid for a full CAN software update. It was only after the software update that this error code appeared. The mechanic took the car for a test drive but typically it was behaving itself and he said it felt and drove like a normal XC90.
It's run like this since I bought it 2 months ago and I would have believed him if I hadn't had the brief glimpses of what it should REALLY feel like. I've split the injector wiring loom about one third of the way along when I changed the terminals for injector one, the inner wire casing are slightly browned from the heat but no obvious damage. Any help appreciated :-)
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