Lights and limp mode when passing

[chorky]

EDIT: 2022 JTR 5,800 miles

Welp, here we are. Did a search and didn't find the tread I was looking for.

So driving home yesterday. Ambient temp about 15, snowy but roads were clear, there was some ice buildup underneath.

Went to pass a RV. As I trans downshifted a few gears (about 3/4 throttle), and the left tires hit the center rumble strip, it immediately threw lights and limp mode. CEL was on, the red throttle sensor was blinking, and a service traction control message if I remember correctly. Foot to the floor with no power as others experienced. Was able to go 35. Pulled over, remembering a tread about this somewhere. Shut the engine off and restarted. only the CEL was on. It drove home fine the rest of the way - 2 more hours at 80.

My initial thought was the rumble strip kicked up a rock or vibrated the wheel speed sensors and threw a code. I dont suspect anything super serious since it restarted and then drove just fine. It could have been easy to damage one of the wheel sensors with such low temps and some ice buildup under the rig. Going to have a local shop just check codes on Monday probably before going 2 hours away to a dealer.

Just curious if anyone remembers that particular thread that had a very similar if not exact situation.

EDIT: I suspect it was an attempt to control traction as the lights and limp mode happened immediately as the truck downshifted and left tires hit the rumble strip which was filled with water, partially frozen from the 14 degree temps

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[Maximus Gladius]

What year, model and MILAGE is your rig? I first thought “misfire” but you didn’t mention feeling the truck vibrating and shaking. You said it went into limp mode. Could this be a safety feature built in maybe??

 

[kevman65]

When you hit the rumble strip at speed, your traction control and stability control sensors detected the event and for your safety put the truck into limp mode.

They can be overly sensitive.

 

[chorky]

What year, model and MILAGE is your rig? I first thought “misfire” but you didn’t mention feeling the truck vibrating and shaking. You said it went into limp mode. Could this be a safety feature built in maybe??

2022 JTR 5,800 miles. I doubt a misfire to be honest.... It occurred right as I hit the rumble strip, so if it did shudder or misfire I wouldn't have even noticed as the rumble strip was significant in itself.

 

[chorky]

When you hit the rumble strip at speed, your traction control and stability control sensors detected the event and for your safety put the truck into limp mode.

They can be overly sensitive.

This is what I suspect because there was water/ice in the rumble strip divot things. Since it downshifted right as I hit them I suspect the extra 'power' from a pass attempt caused the left rear tire to spin and threw a traction control situation.

But.... would a traction control event cause the CEL to stay on even after restart?

 

[Maximus Gladius]

OP, is the truck behaving as normal but with the CEL still on? Have you gone out and repeated the action?

Some have suggested going to your auto parts store to have the code read and cleared.

 

[kevman65]

This is what I suspect because there was water/ice in the rumble strip divot things. Since it downshifted right as I hit them I suspect the extra 'power' from a pass attempt caused the left rear tire to spin and threw a traction control situation.

But.... would a traction control event cause the CEL to stay on even after restart?

You didn't just have a traction control event, you also had a stability event. You personally may not think so, but the sensors "thought" you had lost steering control also.

I had tie rod and drag link jump threads when doing a U-turn I had done many times before. Dash lit up like a Christmas tree, power went to near nothing. Put in park, turned off, counted to 30, turned back on and everything was back to normal except the stability light was lit solid. Steering wheel was around 20 degrees off center. Got the tools out and adjusted drag link to steering wheel near centered, stability light was off when I started again.

As I said, overly sensitive. Especially for a vehicle designed to bounce through ruts and stuff.

 

[chorky]

OP, is the truck behaving as normal but with the CEL still on? Have you gone out and repeated the action?

Some have suggested going to your auto parts store to have the code read and cleared.

No - it's the weekend. I'm going to try and get codes checked on Monday. Not happy about a 2 hour drive to do so though. I did not drive it today but I'm sure the CEL will still be on.

You didn't just have a traction control event, you also had a stability event. You personally may not think so, but the sensors "thought" you had lost steering control also.

I had tie rod and drag link jump threads when doing a U-turn I had done many times before. Dash lit up like a Christmas tree, power went to near nothing. Put in park, turned off, counted to 30, turned back on and everything was back to normal except the stability light was lit solid. Steering wheel was around 20 degrees off center. Got the tools out and adjusted drag link to steering wheel near centered, stability light was off when I started again.

As I said, overly sensitive. Especially for a vehicle designed to bounce through ruts and stuff.

Yeah it is shocking but I wonder if it is programed to have a higher sensitivity when in 2wd, and if that sensitivity is reduced or if it takes more to pop a code when in 4wd. still I agree, seems excessive for a 'off road' vehicle. It will be interesting to see what codes are stored.

 

[chorky]

Local shop pulled codes. Will be 2 1/2 weeks before the dealer is able to get it in. And the transmission is still leaking, I knew it wasnt the pan! Frustrating. So Far it has not been very reliable and trustworthy.

P2100 - throttle actuator A control motor circuit open

 

[chorky]

Went to move the jeep and the CEL was no longer on. Strange. I did get a random txt from my dealership saying "your CEL is on, schedule an appointment". But I already had an appointment made. I wonder if they turned it off remotely? If thats even a thing?

Maybe it's time for a tazer or scanner.

 

[ShadowsPapa]

Went to move the jeep and the CEL was no longer on. Strange. I did get a random txt from my dealership saying "your CEL is on, schedule an appointment". But I already had an appointment made. I wonder if they turned it off remotely? If thats even a thing?

Maybe it's time for a tazer or scanner.

If the fault is no longer active, the light can clear itself after so many button start cycles.

 

[chorky]

If the fault is no longer active, the light can clear itself after so many button start cycles.

Oh interesting... That must be a relatively new thing. So does it still store the code though? Or will the code also be removed?

 

[chorky]

Update for folks interested:

TSB 18-071-22 REB B update AA to AD for software update.

apparently the P2100 was tripped several times even though the CEL never came back on nore did it go into limp mode again

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