CEL P2138 VTC - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ǝɔᴉlod · 05-03-2015, 02:46 AM

Today, I was driving with a group on Angeles Crest HWY, so we were beating on the cars quite a bit. Out of nowhere I get CEL, SERVICE STABILITRAC, and reduced engine power. I ran the code and it was p2138 which reads P2138 Throttle / Pedal Position Sensor / Switch D / E Voltage Correlation. i shut off the car and restarted it and it was fine. I have a Vitesse throttle controller and love it, but if it is harming my car, I will unplug it. Does anybody have any ideas/suggestions?

krisprz2010camaross · 05-03-2015, 03:12 AM

Quote:

Originally Posted by ǝɔᴉlod

Today, I was driving with a group on Angeles Crest HWY, so we were beating on the cars quite a bit. Out of nowhere I get CEL, SERVICE STABILITRAC, and reduced engine power. I ran the code and it was p2138 which reads P2138 Throttle / Pedal Position Sensor / Switch D / E Voltage Correlation. i shut off the car and restarted it and it was fine. I have a Vitesse throttle controller and love it, but if it is harming my car, I will unplug it. Does anybody have any ideas/suggestions?

Yup it might be the vitesse throttle controller. If you look at my thread this happened to me, and I remember seeing that code on my first controller before I sent it back along with p2101 and p1516. I love the controller but not if it causes this to happen.

camguynj · 05-03-2015, 05:50 AM

Quote:

Originally Posted by ǝɔᴉlod

Today, I was driving with a group on Angeles Crest HWY, so we were beating on the cars quite a bit. Out of nowhere I get CEL, SERVICE STABILITRAC, and reduced engine power. I ran the code and it was p2138 which reads P2138 Throttle / Pedal Position Sensor / Switch D / E Voltage Correlation. i shut off the car and restarted it and it was fine. I have a Vitesse throttle controller and love it, but if it is harming my car, I will unplug it. Does anybody have any ideas/suggestions?

Yep, it's the VTC. Simply put the throttle sensor get faster/mixed signals than it expects from the pedal sensor ( especially at higher SP settings and when accelerating fast) so it thinks there's a problem and goes into reduced power mode.

Gee · 05-03-2015, 06:15 AM

I don't think its worth the risk. Messing with voltages and cancelling current just doesn't seem like a viable way to control your throttle position.

ǝɔᴉlod · 05-04-2015, 11:16 AM

Quote:

Originally Posted by camguynj

Yep, it's the VTC. Simply put the throttle sensor get faster/mixed signals than it expects from the pedal sensor ( especially at higher SP settings and when accelerating fast) so it thinks there's a problem and goes into reduced power mode.

That is what I thought

gajagfan · 05-04-2015, 11:36 AM

Quote:

Originally Posted by Gee

I don't think its worth the risk. Messing with voltages and cancelling current just doesn't seem like a viable way to control your throttle position.

Especially with ZERO performance gain.

Ragnar · 05-04-2015, 12:10 PM

Vertwheal · 05-04-2015, 12:11 PM

Quote:

Originally Posted by ǝɔᴉlod

Today, I was driving with a group on Angeles Crest HWY, so we were beating on the cars quite a bit. Out of nowhere I get CEL, SERVICE STABILITRAC, and reduced engine power. I ran the code and it was p2138 which reads P2138 Throttle / Pedal Position Sensor / Switch D / E Voltage Correlation. i shut off the car and restarted it and it was fine. I have a Vitesse throttle controller and love it, but if it is harming my car, I will unplug it. Does anybody have any ideas/suggestions?

I had the same exact problem - deleted the VTC and the problem is gone.

NC_SS · 05-04-2015, 12:37 PM

Huh, I thought this was mostly a V6 issue. Apparently was wrong.

Stuff like this spreads like wildfire though. So I guess I'll wait it out?

camguynj · 05-04-2015, 12:40 PM

Quote:

Originally Posted by ǝɔᴉlod

Today, I was driving with a group on Angeles Crest HWY, so we were beating on the cars quite a bit. Out of nowhere I get CEL, SERVICE STABILITRAC, and reduced engine power. I ran the code and it was p2138 which reads P2138 Throttle / Pedal Position Sensor / Switch D / E Voltage Correlation. i shut off the car and restarted it and it was fine. I have a Vitesse throttle controller and love it, but if it is harming my car, I will unplug it. Does anybody have any ideas/suggestions?

Just curious what SP setting did you have it on when you got the CEL,etc ?

Splitter · 05-04-2015, 12:52 PM

Quote:

Originally Posted by Gee

I don't think its worth the risk. Messing with voltages and cancelling current just doesn't seem like a viable way to control your throttle position.

ǝɔᴉlod · 05-05-2015, 02:11 AM

Quote:

Originally Posted by camguynj

Just curious what SP setting did you have it on when you got the CEL,etc ?

SP9

Chevy_cowboy · 05-05-2015, 05:12 AM

Did you calibrate it when you installed it?

ǝɔᴉlod · 05-05-2015, 05:38 AM

Quote:

Originally Posted by Chevy_cowboy

Did you calibrate it when you installed it?

yes

05-03-2015, 02:46 AM	#1
ǝɔᴉlod Account Suspended Drives: 2014 SS/RS M6 Join Date: Apr 2015 Location: 92677 Posts: 83	CEL P2138 VTC Today, I was driving with a group on Angeles Crest HWY, so we were beating on the cars quite a bit. Out of nowhere I get CEL, SERVICE STABILITRAC, and reduced engine power. I ran the code and it was p2138 which reads P2138 Throttle / Pedal Position Sensor / Switch D / E Voltage Correlation. i shut off the car and restarted it and it was fine. I have a Vitesse throttle controller and love it, but if it is harming my car, I will unplug it. Does anybody have any ideas/suggestions? Last edited by ǝɔᴉlod; 05-04-2015 at 11:16 AM.

05-04-2015, 12:10 PM	#7
Ragnar Destroyed by flooding Drives: Wife's car Join Date: Mar 2014 Location: Louisiana Posts: 4,673	__________________

05-05-2015, 05:12 AM	#13
Chevy_cowboy Drives: 2011 IOM 2SS/RS M6 Convertible Join Date: Feb 2014 Location: Southern Illinois Posts: 1,287 View My Garage	Did you calibrate it when you installed it? __________________

05-03-2015, 06:15 AM	#4
Gee Silver Ice Drives: 2011 1LT Coupe SIM Join Date: Nov 2013 Location: MA Posts: 1,420 View My Garage	I don't think its worth the risk. Messing with voltages and cancelling current just doesn't seem like a viable way to control your throttle position.

05-04-2015, 12:37 PM	#9
NC_SS Drives: 2012 M6 Camaro SS (RIP) Join Date: Nov 2014 Location: Virginia Posts: 1,684	Huh, I thought this was mostly a V6 issue. Apparently was wrong. Stuff like this spreads like wildfire though. So I guess I'll wait it out?