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Powerboost CEL P237C/Exhaust Heat Exchanger Leak Megathread

LukeBaldy

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Depends on your bed size. The original defective part number is ML3Z-5A212-S.

The updated part for a 5.5 foot bed is ML3Z-5A212-W.

The updated part for a 6.5 foot bed is ML3Z-5A212-V.

2021 or 2022 doesn't make a difference. It sounds like he's ordering the wrong size for you.
Thanks for the help! They don’t even know what the part does lol, this is frustrating
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Nasto

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Thanks for the help! They don’t even know what the part does lol, this is frustrating
It's a long and painful story, but the short answer discovered by others on this thread is that it is a non-essential "comfort" device. Gets heat to the cabin quicker when the engine starts in electric mode.
If you really want to get into the nuts and bolts of it, review this entire thread. We just hit 50 pages! o_O

BTW, @TN Rotty keeps a spreadsheet. If you haven't already, you should get on it.

https://www.f150gen14.com/forum/thr...t-heat-exchanger-leak-megathread.8634/page-46
 

iceman77

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What does the small coolant tank do for the vehicle?
Its for the EV coolant loop (its separate from ICE).

Ford F-150 Powerboost CEL P237C/Exhaust Heat Exchanger Leak Megathread 1652390324142


1 High voltage battery radiator
2 Motor electronics radiator
3 High voltage battery radiator inlet hose
4 Motor electronics radiator inlet hose
5 High voltage to low voltage converter assembly
6 Inverter system controller
7 Motor electronics jumper hose
8 Radiator outlet hose
9 Coolant expansion tank
10 High voltage battery jumper hose assembly
11 High voltage power inverter module
12 High voltage battery
13 High voltage battery jumper hose assembly
14 High voltage battery outlet hose
15 High voltage battery jumper hose
16 High voltage battery coolant inlet temperature sensor
17 High voltage battery inlet hose
18 High voltage battery jumper hose
19 High voltage battery hose assembly
20 Coolant expansion tank hose
21 Deaeration manifold
22 High voltage battery coolant pump
23 Motor electronics coolant pump
24 Motor electronics coolant pump outlet hose
25 High voltage battery coolant pump inlet hose
26 High voltage battery coolant diverter valve
27 High voltage battery cooler
 
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TheGoatman

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Depends on your bed size. The original defective part number is ML3Z-5A212-S.

The updated part for a 5.5 foot bed is ML3Z-5A212-W.

The updated part for a 6.5 foot bed is ML3Z-5A212-V.

2021 or 2022 doesn't make a difference. It sounds like he's ordering the wrong size for you.
Just snapped this off the new truck. 3-1-22 build

what is this

Ford F-150 Powerboost CEL P237C/Exhaust Heat Exchanger Leak Megathread 93C61F41-9A7F-44E9-B81B-EE17F9286F1A
 

Nasto

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Just snapped this off the new truck. 3-1-22 build

what is this

93C61F41-9A7F-44E9-B81B-EE17F9286F1A.jpeg
I don't see the "Z" either. There's a "4" there now, if this is really the same part. I'm not even going to speculate at this point. If the "F" doesn't stand for "Ford", I can only think of one other appropriate word. 😬
 

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TheGoatman

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If I put in the s number in ford parts website it’s unavailable

ML3Z-5A212-W and Ml34-5a212-F* both come up available
 

iceman77

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I don't see the "Z" either. There's a "4" there now, if this is really the same part. I'm not even going to speculate at this point. If the "F" doesn't stand for "Ford", I can only think of one other appropriate word. 😬
ML34 is usually the product assembly number where ML3Z is the product catalog number. This is common for almost every Ford part out there
 

TN Rotty

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Okay - new sheet - I think I got the updates correct - but as always check my work and let me know of any issues.

NameBlendBed/ PartTold DlrMilesCan Drivepart orderedpart arrivedInstall DateIssues After?
Rhymeand reasons
01/05/22​
5.5/W
2/16​
1990​
no
02/18/22​
3/9 - arrived damaged - re-ordered 3/9 - arrived 4/7
4/8/2022​
No!!!
Nasto
01/05/22​
6.5/V
2/22​
296​
NoWrong -S part ordered: 2/23/22. Re-ordered -V: 03/09/22.
3/29/2022​
3/30/2022​
no
Dmark john
12/20/21​
5.5 W
2/21​
400​
yes- drivable
02/21/22​
3/10/2022​
3/11/2022​
No- have 1K miles post repair and everything is good
Bellin stoke
02/01/22​
5.5/W
3/23​
2600​
No----
4/14/2022​
no
iceman77
01/06/22​
5.5/W
2/22​
1707​
Yes
02/24/22​
4/21/2022​
4/23/2022​
no
Thunder chief
12/23/21​
5.5/W
3/28​
1237​
No
03/28/22​
4/25/2022​
4/26/2022​
no
--------------------------------------------------------------------------
Oxford_Po werboost
09/27/21​
5.5/W
2/7​
7600​
Yes
02/07/22​
TN Rotty
12/19/21​
6.5/V
3/1​
1100​
Yes
03/07/22​
MrFarly
01/04/22​
6.5/V
4/8​
8000​
Yes
04/11/22​
MTPower boost
12/06/21​
5.5/W
4/8​
3127​
no
04/08/22​
MatthyiusMY226.5/V
4/18​
3930​
no
04/22/22​
deeds972
12/15/21​
6.5/V
4/29​
4800​
Maybe?mid may?
Ford Driver
01/22/22​
5.5/W
3/29​
300​
No
04/22/22​
Klvanzu
01/16/22​
5.5/W
5/11​
3100​
Yes
05/11/22​

For any new records get me the info in a column like so :

Name
Blend (build date of your truck)
bed/part
told dealer
mileage
drivable
part ordered
part arrived
installed
any issues after

Example:
TN Rotty
12/19/22
6.5/V
03/01/22
1100
Yes
3/7/2022
 

ZIP465

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It's been close to a month now, still waiting on part ML3Z-5A212-V status. Ford did provide a loaner so good on that front, and dealer has made the first payment on the truck. Like the idea of asking for extended warranty coverage, but also considering having the dealer just take the truck back.
 

MTPowerboost

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Got my truck back Wednesday 5/11. 150 miles so far so good. Also part was actually ordered 4/06. In the shop 4/07 till repaired.
 

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TN Rotty

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Got my truck back Wednesday 5/11. 150 miles so far so good. Also part was actually ordered 4/06. In the shop 4/07 till repaired.
Good to hear - I'll try to update tonight.
 

rhymeandreasons

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just went to the dealer and had them top off the small tank. still never saw a leak.

...but now i for know for sure they're both at the Max line, should be easier to detect if im losing any.


small reservoir is low. big one is at Max still. havent seen a leak (yet)

1DC2D013-FEC0-4E3C-801C-E4D91336C17E.jpeg
 

TN Rotty

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@MTPowerboost is across the line!

@ZIP465 - if you want your stats on here get me your info (as best you can) per the bottom of this list

NameBlendBed/ PartTold DlrMilesCan Drivepart orderedpart arrivedInstall DateIssues After?
Rhymeand reasons
01/05/22​
5.5/W
2/16​
1990​
no
02/18/22​
3/9 - arrived damaged - re-ordered 3/9 - arrived 4/7
4/8/2022​
No!!!
Nasto
01/05/22​
6.5/V
2/22​
296​
NoWrong -S part ordered: 2/23/22. Re-ordered -V: 03/09/22.
3/29/2022​
3/30/2022​
no
Dmark john
12/20/21​
5.5 W
2/21​
400​
yes- drivable
02/21/22​
3/10/2022​
3/11/2022​
No- have 1K miles post repair and everything is good
Bellin stoke
02/01/22​
5.5/W
3/23​
2600​
No----
4/14/2022​
no
iceman77
01/06/22​
5.5/W
2/22​
1707​
Yes
02/24/22​
4/21/2022​
4/23/2022​
no
Thunder chief
12/23/21​
5.5/W
3/28​
1237​
No
03/28/22​
4/25/2022​
4/26/2022​
no
MTPower boost
12/06/21​
5.5/W
4/8​
3127​
no
04/06/22​
5/11/2022​
No - 150 miles so far
--------------------------------------------------------------------------
Oxford_Po werboost
09/27/21​
5.5/W
2/7​
7600​
Yes
02/07/22​
TN Rotty
12/19/21​
6.5/V
3/1​
1100​
Yes
03/07/22​
MrFarly
01/04/22​
6.5/V
4/8​
8000​
Yes
04/11/22​
MatthyiusMY226.5/V
4/18​
3930​
no
04/22/22​
deeds972
12/15/21​
6.5/V
4/29​
4800​
Maybe?mid may?
Ford Driver
01/22/22​
5.5/W
3/29​
300​
No
04/22/22​
Klvanzu
01/16/22​
5.5/W
5/11​
3100​
Yes
05/11/22​

For any new records get me the info in a column like so :

Name
Blend (build date of your truck)
bed/part
told dealer
mileage
drivable
part ordered
part arrived
installed
any issues after

Example:
TN Rotty
12/19/22
6.5/V
03/01/22
1100
Yes
3/7/2022
 

Snakebitten

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Its for the EV coolant loop (its separate from ICE).

1652390324142.png


1 High voltage battery radiator
2 Motor electronics radiator
3 High voltage battery radiator inlet hose
4 Motor electronics radiator inlet hose
5 High voltage to low voltage converter assembly
6 Inverter system controller
7 Motor electronics jumper hose
8 Radiator outlet hose
9 Coolant expansion tank
10 High voltage battery jumper hose assembly
11 High voltage power inverter module
12 High voltage battery
13 High voltage battery jumper hose assembly
14 High voltage battery outlet hose
15 High voltage battery jumper hose
16 High voltage battery coolant inlet temperature sensor
17 High voltage battery inlet hose
18 High voltage battery jumper hose
19 High voltage battery hose assembly
20 Coolant expansion tank hose
21 Deaeration manifold
22 High voltage battery coolant pump
23 Motor electronics coolant pump
24 Motor electronics coolant pump outlet hose
25 High voltage battery coolant pump inlet hose
26 High voltage battery coolant diverter valve
27 High voltage battery cooler
I'm confused. I don't see the exhaust heat exchanger in that picture. Am I missing something?
I thought I did see it in the ICE coolant loop picture though.

Since you had to top off the expansion tank because of the leak, was it the smaller expansion tank?

I see it in this cooling loop (#20)

Ford F-150 Powerboost CEL P237C/Exhaust Heat Exchanger Leak Megathread Screenshot_20220513-153518_OneDrive
 
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iceman77

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I'm confused. I don't see the exhaust heat exchanger in that picture. Am I missing something?
I thought I did see it in the ICE coolant loop picture though.

Since you had to top off the expansion tank because of the leak, was it the smaller expansion tank?

I see it in this cooling loop (#20)

Screenshot_20220513-153518_OneDrive.jpg
The pic I posted above is the EV cooling loop. The exhaust heat exchanger is not part of it since it is on the ICE cooling loop, and the large coolant reservoir. @rhymeandreasons claimed he is low on coolant in the small coolant reservoir which is part of the EV cooling loop (item #9 on my diagram)
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