New stabilitrac problem

[Big Mama]

So lots of threads about stabilitrac error but didn’t see this. My warning light comes on as I come to a stop. It goes off as soon as i take off again. ABS sensor? 2007 Denali 122k miles nothing new like an accident, electrical work, brakes, nada. Thoughts??

 

[Big Mama]

update noe cel is on. I have a basic scan tool says 02 sensor. Stabilitrac error wont stay on enough to read code. Can say problem was gone all the way to work, about 8-10 stops, then came back on when i brake and this is when cel came on.

 

[swathdiver]

Steven, you'll need a scan tool that can read brake module codes. When that error light came on it triggered an internal trouble code. It could be an ABS sensor which is part of the hub or a wheel speed sensor. Check your wiring and connections at each corner. Seems to be brake related but tough to tell.

Anyone around you with a Tech2 or advanced scan tool?

 

[Big Mama]

Not sure. I’m in Roanoke Virginia. Is there a way I can check without someone having to see my post?

 

[swathdiver]

Not sure. I’m in Roanoke Virginia. Is there a way I can check without someone having to see my post?

I've suggested that the site include a map for anyone wanting to participate so folks can call on each other for face to face help. My query was whether you knew someone with a Tech2 or some kind of advanced scan tool. Harbor Freight has some that can read ABS codes but you'll want to make sure they work on our platform.

 

[Big Mama]

Ok I think Advanced can read stored trouble codes but we’ll see about ABS. my code reader gave me a P0171 and P0174. I thought I saw something about a relationship. This all started Sunday backing down driveway. At the end both cel and stabilitrac came on.

 

[Big Mama]

If it ever stops raining I’ll check all wiring at corners today.

 

[Big Mama]

Update Advance obd gave C0561 in the history and P0701 and P0704 intermittent. Today no rain no stabilitrac lights on way to work or on way home until I backed down driveway. Came on when I stop I roll forward went back off. Checking connections in a couple hours.

 

[swathdiver]

I think you have two separate issues Steven. You probably need new intake gaskets; that is usually the cause of the first set of codes. But check all connections from the air filter to the throttle body and hoses that connect to the plastic intake.

The C0561 should have a symptom code to go along with it, 71, 72 or 74, telling us the why. It may be related to P0701. The last one is not in my shop manual.

P0701 says it sets if ALL pressure switches do not indicate pressure at start up. The code goes straight to history and does not light up the CEL, it clears after 40 warm up cycles without failure again.

Check this out:

DTC P0701
CIRCUIT DESCRIPTION
The transmission control module (TCM) monitors the status of the pressure switches at start-up, in order to
detect the presence of hydraulic pressure.
DTC P0701 is a type C DTC.

DTC DESCRIPTOR

This diagnostic procedure supports the following DTC:
DTC P0701 Transmission Control System Performance

CONDITIONS FOR RUNNING THE DTC
 The components are powered and ignition voltage is greater than 9.0 volts and less than 18 volts.
 Engine speed is greater than 200 RPM and less than 7,500 RPM for 5 seconds.

CONDITIONS FOR SETTING THE DTC
DTC P0701 sets when the TCM detects the following conditions:
 Transmission fluid temperature is greater than -25°C (-13°F).
 All pressure switches do not indicate pressure at start-up.
 Engine speed is greater than 500 RPM for 6 seconds or 400 RPM for 15 seconds.
 Forward or REVERSE range is selected.

ACTION TAKEN WHEN THE DTC SETS
 The TCM does not illuminate the malfunction indicator lamp (MIL).
 DTC P0701 is stored in TCM history.
 The TCM inhibits torque converter clutch (TCC) engagement.

CONDITIONS FOR CLEARING THE DTC
A scan tool can clear the code from TCM history. The TCM automatically clears the DTC from TCM history if
the vehicle completes 40 warm-up cycles without failure.

DIAGNOSTIC AIDS
 Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:
 A bent terminal
 A backed-out terminal
 A damaged terminal
 Poor terminal tension
 A chafed wire
 A broken wire inside the insulation
 When diagnosing for an intermittent short or open, massage the wiring harness while watching the test
equipment for a change.
 You may have to drive the vehicle in order to experience a condition.
 DTC P0701 may be logged if a forward or REVERSE range is selected immediately after the engine is
started, and before the TCM detects pressure at the switches, 2-6 seconds after the engine starts.
 A plugged control main filter may cause DTC P0701 to set.

There's a lot more to test with the TECH2 and it may be related to the P0704 code too.

You can see this stuff at AllDataDIY with a paid subscription. I use this and the factory shop manual, redundant but helps me move around how I like.

Did we talk about your transmission temperature? I've been helping with so many problems lately, they're starting to blend together!

 

[Big Mama]

We didn’t discuss my trans temp and I just noticed I put the wrong code on the last post. It’s not P0701 and 04 it’s P0171 and P0174. The rich/lean and MAF codes. I’m heading out to start looking for obvious bad conditions vacuum leaks or disconnected. Last repair I did was a few weeks ago getting water out of headlamp which required removing it, intake, and front right inner fender splash guard. I’m off today so I’ll be checking and replying as needed.