Traction control light, wrench icon, nasty upshift

[Thunderbirdsport]

The P1500 is a good place to start

The UO101 is a "standard" code/indicator that there is a fault somewhere and it puts the trans in "limp" mode. It will still drive, just usually stays in 3rd. This happens to the 4th gen Explorers with the 4.6 when the coils go bad....the RF leakage causes the TCM to act erroneously...some folks have replaced the trans thinking it was bad only for the same thing to happen to the brand new/rebuilt unit.

Notice that it resets the UO101 when you cycle the key off and back on..?

The UO155 might also be something to look into....I've no experience with it, so can't advise. Keep us informed...knowledge is a wonderful thing to share

 

[JExpedition07]

Got the traction control light and wrench again today. Pulled over, restarted the truck and it went away. First time it’s happened again.

 

[Thunderbirdsport]

Same codes?

 

[riphip]

Maybe (maybe not) this will help from my Service DVD: Maybe a connector got loosened

 

[JExpedition07]

riphip I’m definitely thinking it’s something amiss in a connector etc. I’m not too concerned as of yet since it’s a rare occurrence and rectified with a shutdown. It’s also possible the VSS sensor is getting tired and all it takes is a moment of doubt to trigger limp mode. I’ll check it out a bit closer when the weather breaks assuming it stays at bay

 

[JExpedition07]

Today I can barely keep it out of limp mode, I’ve restarted it about 5 times lol. Now the green wrench icon and slipping car symbol are flashing constantly. Finally pooped a CEL so maybe I’ll have new codes.

 

[JExpedition07]

Just to update everyone on this the problem was a weak battery. One morning the truck didn’t start....replaced battery. Hasn’t happened in months.

 

[07navi]

These truck do like to have a full 12v all the time.