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View Full Version : P2188 CEL today help me out !


coyfish
09-22-2009, 10:08 PM
Threw a p2188 cel today while cruising. According to one website :

P2188 = Fuel system too rich at idle (Right bank)

Not sure why thats happening. My A/F ratios seem to be like they have always been. Anyone have any knowlege in this area? Im on stock tune still.

thanks
coyfish
09-22-2009, 11:51 PM
after doing some research it appears some mazdas have a bad ground wire connecting the mass airflow sensor. Reports included stalling at idle and lagging take off. I haven't experienced either but I definately felt something was off at idle but I thought it was my imagination.

I guess ill take a look tommorow for the ground wire. Hopefully this can be fixed without taking it to the dealer.
ssinstaller
09-27-2009, 05:04 PM
Clean the MAF sensor.. But it's probably due the the MAF housing on that injen CAI throwing off your fuel trims...
wannabe
10-02-2009, 06:44 AM
i had a similar issue a while back, i was getting too lean and too rich simulataneously. turned out to be a faulty o2 sensor.
coyfish
10-02-2009, 11:51 AM
Yeah it corrected itself. Thanks for the responses though. I think the problem was that my boost gauge vacuum hose popped off the T when I was driving for about 5 min. I guess that made the car run too rich down the road.
coyfish
11-15-2009, 02:49 AM
Well the CEL decided to come back tonight. Same P2188. Ill clean off my MAF sensor tommorow and hopefully that will fix it. How would you diagnose a faulty O2 sensor ??

One of the things I have noticed is that at idle it occasionally dips too low for a few seconds. Gets down to about 600 and feels "rough" like your not giving enough gas to engage 1st. But it corrects itself and idles fine after that.
coyfish
11-17-2009, 04:36 PM
Not like anyone cares but I figured I would "conclude" this thread for the benfit of future searches. Was driving home from school and my A/F ratio dropped to around 11 at idle and the rpm's dipped like crazy and the car died. I jumped out and luckily saw the problem almost instantly. The recirc line on the BOV wasn't fitted properly. It was kind of tilted creating a small hole which allowed air to escape causing me to run rich. Haven't been able to fix it so I just slip the hose on the nipple as good as I can everytime I drive.

When I have time / get home for thanksgiving ill be sure and reclamp that.