Code PO101

[ASSAMI]

Hello guys ,

I'm having a problem with this avalanche . It's a stock motor with nothing on it except STS turbo kit . it is making 334WHP ON 7PSI with 5.3L engine in it .

Every about 100 miles the cars power goes sharply down and it starts detonating . the MIL comes on with a code for the MASS sensor.
PO101


Any clue how can I get this code off of my back .

Cheers

[Tordne]

Are you still using the MAF?

[ASSAMI]

yes, i put it at 6 psi with 310whp. so i dont think it is maxed out .

[TAQuickness]

First thought is you're maxing out your MAF, but, P0101 is a performance code, not circuit high. So to eliminate max'ing the MAF as the culprit, I would reset all the DTC's, then set up a log to monitor the MAF airflow PID's. Take it for a drive and duplicate the problem, then cross check your max MAF airflow vs. the max value in your MAF table.

[dc_justin]

P0101 is related to the same problem that you described in another thread. It is the MAF Rationality Test table. Increase that table some more and give it a go.

Can you post up the values you have there?

Justin

EDIT: NVM, I see you posted the tune. I'll post up a modified one for you.

[dc_justin]

Use the attached tune.

C2911 increased by 400%. This will fix the 101 code.

Also have adjusted the ETC tables to keep you from hitting Reduced Power Mode.