i have code po172 it means it running rich.i want to see if anyone has had this prob and what did thay change.it tells me it could be the MAFF or the o2.

 

it depends on what mods you've done. do you have any intake system that you changed? the P0172 is a fuel trim problem

 

yes i have an intake and a cat back.

 

hmmm, maybe not enough air and too much fuel across the oxygen sensor. it can also be simple as a clogged air filter or something in the intake causing air flow to be lowered or a bad or dirty mass air flow meter.

 

you might have a hose that is pinched and making the air flow or suck less & this could make your ecu show a code

 

probably a bad primary o2...i fouled mine last year from just having a header (i believe) and it was always running like 12-13 afrs on my wideband. if your airflow was restricted, your MAF would only read the air going into the intake anyway....so im guessing thats not it. i had a similar problem today....but mine was running lean. same thing though...was the primary o2.

if you know someone with the same ride, swap with their promary o2, reset the ecu, and then try it.

did you change fuel type? if you put in anything higher than 87, that might also do it.

 

it was down ror a bit getting paint and shaved and iv only had it back on the road about 2-3 weeks and had no prob than all sudden went to work the other day and 10 mil or so into my trip to work went to take off from stop light and it was like it didnt know how to drive a clutch and when i get it to 3 or 4th gear it would not have that jerking but u could feel its lack of power but in 1,2,3,4,5 gear you let off the gas and than got back on it it would jerk the code is po172 bank 1...if that means any thing....

 

OBD-II scanners are a bit limited tho, so your just gonna have to go through trial and error until you find the problem....try all the above suggestions. i bet its one of em.

 

What do you mean OBD-II scanners are a bit limited? Will they not show codes for these cars or something?

 

no i mean they will help you find the problem, but not necessarily the source of the problem. running rich could be caused by several different things but the scanner wont tell you exactly what the cause is.

 

ok i cleaned my intake and MAF.got a new filter cleaned the 02 off it had a lot of black on it check hoses put it all back on an it ran good yes its fixed.for about a day and now its back to the way it was .

 

Did u reset the ecu?

 

That's really not how cars should be fixed. One quick look at the OBD scanner (don't confuse with Code Reader) data would help finding the problem.

 

found the prob it was a short in the plug to the MAF and it would short out the MAF so i just picked up the new plug and wires from the dealer and going to put it in will let you know the outcome.

 

put new plug on and a new MAF it ran good for a week than last night on way home and it started having the same prob and now the code is po103 and po101 can someone help...

 

Hey man you ever get this figured out? If not I figure I would bump it for you even though it's been over a week.