Hello everyone.
I've had this 2005 Matrix since 2007 and it's been fantastic (240,000km), but now I have my first head scratcher. I hope someone here has a few ideas.
Intermittently while driving the engine will go rough for a few seconds, maybe even as long as half a minute and then go back to normal. When this happens the CEL will come on and I'll get 4 error codes ( I got a fuel economy scanner that also do error codes ). The codes that pop up are:
P0351, P0352, P0353 and P0354. This has happened at least 10 different times and everything is always the same.
My long-time trusted, independent mechanic though it might be the Engine Control Module (ECM) (also some places referred to as the PCM). So I took a chance and got a second hand unit from a wrecker ($60) and had the local dealership swap it in and reflash it ($100). I took it for a 15 minute test drive afterwards and had no issues. It looked like that might have been the source of the problem, but it turned out that my sample size was not large enough. The next day the issue popped up 3 times on a 20 minute drive.
Oh yeah, I almost forgot to mention that my Matrix was not part of the recall for ECMs