Help! Intermittent Electrical Issues?

[Petunia22]

Hello all. Reaching out with a possible electric issue on our 2012 Ford Explorer XLT, 4WD. Fairly handy and have done many repairs over the years—but nothing in the realm of electrical troubleshooting. Had a random error message cycle through on the instrument panel, sailing down the highway at 70mph -“service advance track, AWD off, <wrench icon>”. Car went into limp mode. Pulled over. Turned off the vehicle. Waited a few minutes. Restarted with no error messages and drove home beautifully. Immediately replaced the battery, as it was older and showing signs of leaking. Hoping that was the fix. Drove the car a few more times after the new battery was installed. Thought all was well, but alas, the errors returned. Pulled codes in Forscan but don’t even know where to begin. I’m not sure if all of this could be solved by replacing the throttle body? Due to the P2135 code. I’m concerned the issue is wiring related and not the component itself. Any help is greatly appreciated.

 

[dvdswan]

You may want to check your grounds for those components to ensure that they are not corroded.

 

[Petunia22]

You may want to check your grounds for those components to ensure that they are not corroded.

I have some concerns that the leakage from the previous battery may have caused issues, so there very well could be corrosion. Any idea how to locate the corresponding grounds? Thank you for the quick reply. I really appreciate your input.

 

[dvdswan]

I would start with the ones you can see. I've sure the dash has a few behind it, kick panels and back quarter panels have them behind them too. Engine compartment and frame will be the dirtiest ones. Be sure to check the battery cables as well, even with clean connections you can have corroded cables.

 

[peterk9]

I have some concerns that the leakage from the previous battery may have caused issues, so there very well could be corrosion. Any idea how to locate the corresponding grounds? Thank you for the quick reply. I really appreciate your input.

Welcome to the Forum.

Peter

 

[javaleo]

Try cleaning the MASF sensor. It may or may not be the problem. But there is a TSB for 2018 /2019 3.5 Ecoboost engines that codes p0107 and P0109 can set and the check engine and wrench light comes on. Car goes into Limp mode. The fix is to replace the MAPT sensor on top of the intake. Fixes the issue. Don't ask how I know But it the car does not know how much air is coming into the engine, it goes wonky.