powertrain malfunction with 100% power.

[Maxx]

After raving about how flawless my ride has been, today I got the wrench. I read some of the related threads where people had bad modules and shifter issues but I still can't tell which group of unfortune owners I belong to. Here is the short story;

I left the driveway in rain and 4 minutes later I got the wrench but my power was at 100%. Dropped to 95% later at night. I tried the wistful thinking thing (turned off the power and back on twice). The wrench went away. I plugged in for a minute to see if it charges OK. It seemed fine. Got back on the road and wrench came back in less than 3 minutes. I checked the voltage variation with carscanner and it didn't look too bad. I ran the trouble codes (attached) and I have no idea what I am looking at or should be looking at.

Background: At 10K service and recall visit, service advisor told me the mechanic said your battery is borderliner. I assume one of the cells may have been high or low but not bad enough.

I have been almost exclusively Level 2 charging but a few weeks ago I had 6 DCFC in one week.

I tried to charge the truck for just a minute and it charged OK. It drives fine too.

Did any of you have similar symptoms? Is it a battery module? Shifter? Something does not like the moisture? A bad sensor?…. any ideas?

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[GoodSam]

Did a search on that OBD-II DTC code and this came up:

https://www.[banned site]/threads/p...tive-coolant-valve-months-delay.5190/#replies

P0DE9 Defective coolant valve?

 

[RLXXI]

Check coolant level.

 

[Maxx]

Did a search on that OBD-II DTC code and this came up:

https://www.[banned site]/threads/p...tive-coolant-valve-months-delay.5190/#replies

P0DE9 Defective coolant valve?

You may be on to something except I am not sure how to explain the power loss. It went from 96% last night to 95% this morning. It is not at the levels I see people report for battery module failure yet but it is moving in that direction. I am charging now to see if anything changes there.

 

[Maxx]

Check coolant level.

when cold, it is at slightly above Min level.

 

[RLXXI]

when cold, it is at slightly above Min level.

Probably not the issue but definitely bring it up to the max level and clear the codes.

Disconnect the lvb for 30mins for a reset. If it comes back then a dealer trip might be in order.

 

[Maxx]

Did a search on that OBD-II DTC code and this came up:

https://www.[banned site]/threads/p...tive-coolant-valve-months-delay.5190/#replies

P0DE9 Defective coolant valve?

Your theory is the top runner now. For the past 6 months, I never saw power bellow 100% so I freaked out when I saw 96% at the same time as the wrench of death. this morning I charged the battery and that took the battery temp from 50s to 60s and power is back to 100%. Seasons change. Who knew.

Do you think if I call BEV team, they can confirm that it is valve issue remotely ? or a mechanic with a Forscan has to do it in person?

Here is what I may attempt after warranty when it breaks again.



Found more relevant info on this thread:
https://www.f150lightningforum.com/...ered-by-powertrain-warranty.26402/post-504546

 

[GoodSam]

Your theory is the top runner now. For the past 6 months, I never saw power bellow 100% so I freaked out when I saw 96% at the same time as the wrench of death. this morning I charged the battery and that too the temp from 50s to 60s and power is back to 100%. Seasons change. Who knew.

Do you think if I call BEV team, they confirm the valve issue remotely ? or a mechanic with a Forscan has to do it in person?

Here is what I may attempt after warranty when it breaks again.



Found more relevant info on this thread:
https://www.f150lightningforum.com/...ered-by-powertrain-warranty.26402/post-504546

Great information by Martin Rebuilds, I wonder what causes the wear and tear on the plastic gear of the coolant diverter valve? Are some valve assemblies built with less valve friction and will never fail? Or will all of them be replaced in 10 years or 150K miles? Do heat pump models have the same valve control?

I put this on the Youtube video comments:
"I wonder what the percentage of these valves will need to be replaced? What causes the failures? Hate to have to rebuild the valve every 30K miles...looks like it is requiring excessive force to work the valve. Small tan gear is not looking that great. Did the valve feel hard to work which would cause the wear? Can one measure the current required to operate the valve and compare to new units?

Might be more time/cost effective to replace with a new unit. Is this the part? $100 Engine Coolant Control Valve SKU: MU5Z8C513A

https://www.ford.com/product/valve-asy-engine-coolant-control-p4000055114

Does a heat pump coolant control system use the same valve? Max towing, same?"

 

[Maxx]

Great information by Martin Rebuilds, I wonder what causes the wear and tear on the plastic gear of the coolant diverter valve? Are some valve assemblies built with less valve friction and will never fail?

If I had to guess, I would say a combination of cheap parts and bad design that overloads them.

I am hoping most of the failures happen within warranty period to help Ford make better decisions during design stage. However the more likely case is that if this part is replaced with the same part, I will have the same problem out of warranty several times (every 22K) and will pay the dealer dearly to deal with it.

I wish Martin went to more details about what is involved in connecting and disconnecting the hoses, Bleeding the system, ..... I have never done any repairs involving coolants. He has videos on rebuilding a totaled Lightning. Maybe he has something relevant there.

 

[Heliian]

It went from 96% last night to 95% this morning.

This happens normally when state of charge is lower and the battery is cooler. The lower the soc, the lower your available power.

The powertrain malfunction is essentially a check engine light, could mean several things from serious to mundane.

Best of luck. Hope you have a competent dealer.

 

[TaxmanHog]

https://www.ford.com/product/valve-asy-engine-coolant-control-p4000055114

Running this part number with model year 2025 Lightning selected, shows that it's a part which fits it as well.

 

[Maxx]

https://www.ford.com/product/valve-asy-engine-coolant-control-p4000055114

Running this part number with model year 2025 Lightning selected, shows that it's a part which fits it as well.

Does that mean if this part has a design flaw, it has not been fixed? In other words, if they fixed it, would it have a different part number in 25 than it did in 23?

I have an appointment in a week. After it is done, I will post the results to confirm what he problem was.

 

[RickLightning]

As has been stated, having slightly reduced power in cold temps is normal.

FYI, Techs use FDRS, not FORScan.

 

[Maxx]

FYI, Techs use FDRS, not FORScan.

What is the difference? Do they see more info?

 

[RickLightning]

What is the difference? Do they see more info?

Google...

Ford Diagnostic and Repair System is used to diagnose and repair Ford vehicles.

FORScan is software, written by a Russian hacker, that allows you to turn on features that exist, but are turned off, and do SOME procedures.

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