Powertrain Malfunction/Reduced Power Mode

[JackAttack117]

For the people that are seeing this issue, has anyone noticed if it is happening when after driving a long distance in heavy head winds?

No. Mine happened 2 minutes after leaving the parking lot and traveling at ~40mph.

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[B777787]

No. Mine happened 2 minutes after leaving the parking lot and traveling at ~40mph.

Thanks. Just a thought I had and now that you said that has debunked my thinking.

 

[Bmr4mav]

I would bet that 12v recharged enough so that startup test of sensors completed properly with passing voltages, etc AND enough no fault cycles occured to clear the problem has occured flag. Remember that driving in LOW will maximize Regen braking and also use the hydraulic brakes as needed. Think of it as computer controlled brake riding, being sold as a downhill coasting control but try it in stop and go traffic from 0 up to whatever mph you want. LOW also runs the ice much more as it rapidly fills the HVB to soc 70-72% and uses engine braking prior to using hydraulic brakes. Will not directly force more rapid 12v charging but can possibly reduce draw on 12v. A THOUGHT= Maybe when dealer hooks up computer to test truck and cannot replicate problem the 12v now has adequate soc OR the computer also places 12v on to bus! Shouldn't be that way but it's a logical possibility.
ALSO reduced power mode can be triggered by a low coolant fluid level (or possibly a bad sensor reading of it.). Maybe look at ice temp when truck gets the low power screen???

When my truck first failed it was over 70 miles from home. After sitting for 2 hours I was able to drive it 40 miles just fine on the highway with the engine light on. I had it shut off a pitstop for about 5 minutes then drove another 30 miles home still with the engine line on. This was all on Saturday and I'm sure the 12v was nice and charged during this entire day. Didn't drive it again until Monday morning, taking my kid to the bus stop less than half a mile. Shut down for another 5 minutes then drove to daycare 3 miles away and shut off for 2 minutes there. The next start leaving daycare is when the engine light was gone.

My code reader arrived today and it says there are zero codes so at this point I don't even think it's worth taking to the dealer. No evidence of a issue and they don't have a fix anyway.

 

[Bmr4mav]

For the people that are seeing this issue, has anyone noticed if it is happening when after driving a long distance in heavy head winds?

My mom had borrowed my truck and have driven about 70 miles 95% highway and likely around 75-80 mph and it then went into limp mode. She was able to get it off the highway and in gas station parking lot where I then meet her 2 hours later. The day before I had done an 80 mile round trip about 50% highway with zero issues. I also had gone over 100mph multiple times 4 days prior again with zero issues.

 

[B777787]

I just got a text from my dealership stating they found the issue and that it turns out to be the shifter module. Part due 4-5 days. This last time I tried to leave all the indications of the problem and hopefully all the codes remained and not in history. When I pulled over the last time I left it on and it wasn't shutoff until the tow truck driver drove it on the tow truck and then shut it off and also gave them some pictures. Whether this helped them or not I don't know. Will see if it is fixed in a week or so.

 

[Bmr4mav]

Oh yeah, please excuse me for being pissed off. But I just remembered I have also picked up the shudder/vibration engine problem since my truck was in for service.

It's done it about 5 times since March 1st (when the PCM recall was done) including today. Today's was shudder was insane. I was slowing for a red light and the engine shook the whole truck as it shut down. I just checked my online service history and it shows nothing has ever been done even though I have the printout from 10k service and recalls 23P18, 24C01, & 23C41. Online shows my recalls are still open also. Lastly I called my dealer and they have no loaners, not that I can't have one, they have zero period. I'm getting tired of Ford and super pissed that I didn't just do the damn oil change myself. We're going on a road trip for Spring Break next week and now I'm stuck renting a vehicle because I can't trust my 1 year old Maverick.

https://static.nhtsa.gov/odi/tsbs/2023/MC-10238445-0001.pdf

 

[TomsFMAV]

Oh yeah, please excuse me for being pissed off. But I just remembered I have also picked up the shudder/vibration engine problem since my truck was in for service.

It's done it about 5 times since March 1st (when the PCM recall was done) including today. Today's was shudder was insane. I was slowing for a red light and the engine shook the whole truck as it shut down. I just checked my online service history and it shows nothing has ever been done even though I have the printout from 10k service and recalls 23P18, 24C01, & 23C41. Online shows my recalls are still open also. Lastly I called my dealer and they have no loaners, not that I can't have one, they have zero period. I'm getting tired of Ford and super pissed that I didn't just do the damn oil change myself. We're going on a road trip for Spring Break next week and now I'm stuck renting a vehicle because I can't trust my 1 year old Maverick.

https://static.nhtsa.gov/odi/tsbs/2023/MC-10238445-0001.pdf

Your dealer should set you up with a paid for by Ford rental. Thats what they did for me.

 

[Ozarkbeard]

Just a thought.... Has any anyone with this problem put the hybrid maverick into tow haul, sport, or low in standard, eco, or slippery to see if it changes anything...

Just posting my experience so far w/ the software updates.

I have had the recalls done, but have not had any issues so far.

• I put the truck in Slippery mode almost every time I drive it.
• I fully charged the 12v battery the day before I took the truck in for the recalls.
• The software updates were done at a large dealership w/ a lot of Maverick experience..
• Two of their service dept. employees have Hybrid Mavs.

 

[Random]

Ford corporate has stated they have fixed it. More details at the post below.
https://www.mavericktruckclub.com/f...n-it-was-gassing-on-its-own.44108/post-813356

 

[RadioDoc]

Just had it happen again. Had the truck running for about 10 minutes prior to driving, pulled out of the driveway and didn't even get up to 20 before truck put itself into limp mode. The most jarring part is the automatic parking brake application once you start slowing down. Hoping that, like last time, I can just let it sit for a couple of hours then clear the codes.

 

[RadioDoc]

And once again, let the vehicle sit for a few hours, DTCs still present but whatever is actually causing the fault and limp mode to kick on isn't occurring. Reset the codes, no faults pop back up, truck is back to normal (when it first happened any attempt to reset the codes would fail and it would remain in limp mode after the reset).

 

[Xitment]

No. Mine happened 2 minutes after leaving the parking lot and traveling at ~40mph.

Happened to me within a mile of leaving my home I was going about 20 mph slowing down when approaching a red traffic light.

 

[B777787]

So got my truck back on Monday afternoon after they replaced the GSM and the HVAC module. Drove to and from work a day and half and the second half after pulling out of the parking lot at work got a message Service engine soon with a wrench but not all the other bells and whistles like it was on the highway the first couple of times. Drove it to the dealership and said here you go. Kept it on when I pulled in to make sure they could pull all the codes that they needed instead of history. The code said GSM again so not sure where they are going with it this time.

 

[Funhog]

I joined the unfortunate club today. Had the software update done about 2 weeks ago. Lucky I was pulling out of a parking lot where there was no traffic.

never had a car drive like that before. First it lost power and wouldn’t accelerate. I pulled over and shut off the car. Turned it back on and headed back to where I came from. All the sudden it was accelerating without my foot on the gas. Bizzare.

had the code cleared by a friend and it’s been ok the last couple drives but I’m afraid to take it on the freeway.

Exact symptoms experienced by my wife this evening while dropping off the neighbors kids! Good thing we live in a relatively quiet neighborhood but I'm livid!

 

[B777787]

So got my truck back on Monday afternoon after they replaced the GSM and the HVAC module. Drove to and from work a day and half and the second half after pulling out of the parking lot at work got a message Service engine soon with a wrench but not all the other bells and whistles like it was on the highway the first couple of times. Drove it to the dealership and said here you go. Kept it on when I pulled in to make sure they could pull all the codes that they needed instead of history. The code said GSM again so not sure where they are going with it this time.

Just an update they were really fast on replacing the GSM module this time. I have been driving to and from work all week with no issues so far. Have not taken on a extended trip yet.

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