SCcobaltSS

iTrader: (2)

I have these codes below:

[PCM] P0121 - TP Sensor Circuit Insufficient Activity (SES) (Old) (History) (Immature)
[PCM] P1101 - Mass Air Flow Sensor Out Of Self Test Range

I have cleaned the MAF and switched out the TB to see if the codes go away. Nothing.

Both codes came on at the same time I believe.

Let me know if you any ideas.. Thanks!

SCcobaltSS

iTrader: (2)

bump...

Coblasts

Could be a bad connector,check them back to and including the ECM connectors.

yel-low

p1101 i believe is the sc intake sensor

p0121 is a thottle body cleaning is what fixes it

Chevycobaltss3

iTrader: (2)

Mass air flow out of range means yre hertz it outa bounds. So retune for the hertz or the more boost for colder weather.

SCcobaltSS

iTrader: (2)

I will check that.

I switched from one then back to another. Both we clean as a whistle. lol

Retune the trims or what? Not to sure what you mean by retune the hertz...

Chevycobaltss3

iTrader: (2)

Hertz is used as say trim but hertz is used to tell the ecm how much airflow is coming in. So yes trims lol just retune the maf and do ve as well.

SCcobaltSS

iTrader: (2)

I know the MAF reads in hertz I just didnt get when you said tune the hertz

My tune should be fine, I just tuned for winter not too long ago... but I will check it again.