P0172, P0175, possible tuning needed to fix?

*TDotMax* · 09-23-2009, 04:14 PM

Post in 5th gen section put perhaps I can get a more "advanced" reply here. Reason is I'm wondering if these codes are simply because I run rich after 3200rpm? I'm having a few parts installed and getting a dyno tune done. Could the dyno potentially correct these codes I'm pulling?

Thanks,

P0172, P0175 Codes. Car modded and I know it runs rich after 3200rpm

MoncefA33 · 09-23-2009, 11:09 PM

It shouldn't be a problem unless the car is rich in closed loop. What AFRs is your car reading in part throttle/cruise?

*TDotMax* · 09-24-2009, 06:54 AM

Quote:

Originally Posted by MoncefA33

It shouldn't be a problem unless the car is rich in closed loop. What AFRs is your car reading in part throttle/cruise?

14.5 around there, but just giving it a little more gas then it goes to 13's, then 12's to 11's at WOT

*TDotMax* · 10-05-2009, 09:37 AM

Any other ideas before I dump money into O2's I may not need?

*DandyMax* · 10-05-2009, 10:34 AM

Kev if you need to confirm the health of your O2 sensors, watch their waveforms on an OBD scanner such as the Auto Enginuity Ray has, you'll be able to watch them cycle in closed loop and the voltages also which will tell you what they're doing.

*DAVE Sz* · 10-05-2009, 10:36 AM

Quote:

Originally Posted by TDotMax

Any other ideas before I dump money into O2's I may not need?

the O2s do nothing after 3000rpm, why are you replacing them? If you were lean or rich at idle then I would understand.
did you tune the car like you said you were?

*TDotMax* · 10-05-2009, 12:42 PM

Thanks Dan,

That does help.

Dave thanks for letting me know they do nothing after 3000. I haven't had it tuned yet. A lot of delays on getting around to the mods. Hopefully soon enough. My sensors are only 1.5 years old maybe 2 tops.