Freeze frame, what does all this mean?

[khung88876]

Closed

[matt5112]

-21 is technically outside of the -16.4 to 16.4 range for LTFT's....

So it seems the car is detecting way too much fuel and attempting to reduce it.

LTFT's should be around -3 to 3 most of the time.

Also appears this was at idle according to the vec speed....

TPS is 20.7% or what?

Can you get the voltage for the TPS?

It should be .40 V at no throttle.

[matt5112]

get a digital multimeter...

also sort out those codes.

theres info on that in the FAQ section at the top of every page.

[matt5112]

if thats 20.7% TPS then yes, get a new TPS sensor.

Its on the side of the TB.

[matt5112]

Honestly? no idea.

Try going to GPONA.com and looking in the GM service manual OR try compnine.com and looking under diagrams/research.

[NegativeOne13]

There is an additional fail-safe APS but 99.9999999% chance that theres nothing wrong with it. As for the user APS, it is the whole accelerate pedal itself. I just replaced mine here a few months ago due to erratic idles while moving. And IIRC there is two bolts holding it on.

[01gpgt01]

-21 is the Evap purging no worries. Whats the TPS reading at idle?

[NegativeOne13]

The problems I was having with mine was cruising down the highway at idle, my RPMs would fluctuate, service bulletin said APS could be the cause. Replaced APS, same problem, tranny warrantied.