P0139, P0172, and P0234

[jsmith]

Codes are:
P0139 - 02 Sensor Circuit Slow Response
P0172 - Fuel System too Rich
P0234 - Engine Overboost Condition

I am guessing its the MAF, as the STFT/LTFT readings suddenly jump to/from large and static values.

Cold start idle log is attached.

Any input, or past experiences with similar issues would be appreciated.

 

[neganox]

If you hold the throttle a bit while cranking to bypass the cold start routine, do the codes appear again?

 

[jsmith]

The cold start routine is pretty neutered via the tune.
I'll give it a try, but so far the codes have reappeared across battery pull resets.

 

[5doorsoffury]

Did these just pop up out of no where or did something happen? How does it drive. It may be the rear o2.

 

[jsmith]

Was pretty sudden. Car drove well enough before I parked it for a month or so. Car drives well enough as long as no WOT.

 

[neganox]

Turn those emission codes off. You're a Floridian.

 

[jsmith]

MAF and BPV cleaned. Rear O2 replaced. I thought that the rear O2 was just for emissions?

 

[Mauro_Penguin]

Have you checked your tire pressure?

 

[jsmith]

With only the finest of analog tire gauges. My right tire pressure was 1.5psi off of my left when viewing. Why do you ask?

 

[Mauro_Penguin]

No reason, just being stupid.

With the issues that you and Raider are having, I wonder if I should change mine for good measure....

 

[neganox]

Weird. I assume the codes went away?

 

[Raider]

There is a good chance my car passed on an extra demon to possess your Speed.