2007 MPV van.
Car runs fine, but the check engine light is on. My wife took it to a local shop who read the codes, but couldn't tell her what they mean. Yes, I have issue with a "shop" that charges a "diagnostic fee" to read codes without any actual diagnosis... but I digress.
Anyway, the car runs fine, just has the check engine light on. Codes are P2197, P2189, P2195, and P2187.
Anybody know what those codes are?
Is there a way to manually reset this?
Thanks!
Google them.
Since the light is on, they are not Mazda specific codes.
P2187- System too lean at idle, bank 1
P2189- System too lean at idle, bank 2
P2195- O2 sensor biased/stuck lean (bank 1, sensor 1)
P2197- O2 sensor biased/stuck lean (bank 2, sensor 1)
Sure sounds like it's running lean.
Funny that it's happening on both banks. So it could be a minor leak. If it was just one bank, I would lean toward a O2 sensor heater going out, so that at idle it was reading a low voltage from being too cold. But it would also throw a heater code.
System too lean codes are often thrown when there is an unmetered air leak, ie a vacuum leak. I would start checking there.
Any resolution on this? Have the EXACT same code sequence on my wife's 2005 MPV. Am suspecting an O2 sensor but would like to know what your fix was :)
Thanks!
mith612 wrote:System too lean codes are often thrown when there is an unmetered air leak, ie a vacuum leak. I would start checking there.
My guess is that this is most likely the case.. There's got to be a leak of some sort letting excess air in after the air flow sensor, or else it would only be affecting one bank, at which point you could have a sensor issue as was suggested above..
It could also be a bad MAF sensor. In fact, my p5 was pinging like crazy until I cleaned the maf. Was running really lean. I also chased my tail for awhile with my 318ti and a bad maf. Never threw a MAF code, just lots of adaptive A/F codes and O2 codes.
if none of these fix your problem, run a search in the apropriate forums on mpvclub.com.
you dont have to create an account to look around there.
interesting that it's setting the "too lean at idle" codes. when the intake elbow between the MAF and the TB was torn on my mazda6, it did not set the "at idle" codes. so i'd be looking for vacuum leaks around the TB, on ports that only have vacuum at very low throttle openings (if such ports exist).
Thanks for the input fellas. It's looking like the PCV valve based on the research I've done. Downside is it's at the very back of the motor and the only way to get any real access is to remove the intake mani. So I'll be doing the plugs and coils at the same time :) I'll update the post when I get the job done.
Thanks again!
Just to close the loop on this. The problem was the PCV Valve as suspected. It had two holes on it, was collapsed and in general was falling apart.
So these codes: P2197, P2189, P2195, and P2187 = PCV Valve.
So,,,,, what fixed the car?
In reply to GVX19:
Replacing the PCV Valve 
