TSB 24-2010 - Slow Level 1 or Level 2 Charging Or Does Not Charge

Mach-Lee · Jan 11, 2024

Some '21-'23 Mach-E's may experience an issue with slower than normal charge rates while AC charging after an OTA (6.6.0 I believe). This may be accompanied by coolant pump humming, elevated battery temperatures, and increased charging energy consumption. In some cases on low-rate Level 2 or Level 1 charging, the battery may actually lose charge while plugged in. A powertrain/charger software update is available that fixes this issue.

To test if you have this issue, charge on Level 1 - 120V. The battery should gain charge at a rate of 1.0-1.5% per hour. If the battery does not gain charge or decreases on Level 1, you have the issue.

Your dealer will need to check if a parameter is incorrect with a scan tool first before they can apply the update.

TECHNICAL SERVICE BULLETIN
High Voltage Battery Slow Charging Or Does Not Charge - Built On Or Before 24-Jun-2023

24-2010
11 January 2024

Model:

Ford
2021-2023 Mustang Mach-E

Built on or before 24-Jun-2023

Markets: Canada, USA

Issue: Some 2021-2023 Mustang Mach-E vehicles built on or before 24-Jun-2023 may exhibit a condition where the high voltage battery slow charging or does not charge while using a level 1 or level 2 electric vehicle supply equipment (EVSE) after an over the air (OTA) update. This may be due to the software in the secondary on-board diagnostic control module A (SOBDM). To correct the condition, follow the Service Procedure to reprogram the SOBDM.
Action: Follow the Service Procedure to correct the condition on vehicles that meet all of the following criteria:

• 2021-2023 Mustang Mach-E
• Built on or before 24-Jun-2023
• High voltage battery slow charging or does not charge while using a level 1 or level 2 EVSE after an over the air (OTA) update

Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool.
Labor Times

Description	Operation No.	Time
2021-2023 Mustang Mach-E: Reprogram The Appropriate Modules As Required By The Software Update And Service Procedure (Do Not Use With Any Other Labor Operations)	MT242010	Actual Time

Repair/Claim Coding

Causal Part:	10B689
Condition Code:	04

Service Procedure

1. With the ignition on and vehicle not plugged into an EVSE. Start a Ford Diagnosis and Repair System (FDRS) session and navigate to Toolbox tab > Datalogger > Secondary On-Board Diagnostic Control Module A (SOBDM) and Battery Energy Control Module (BECM) select the BAT_CHARG_PWR parameter identification (PID) in both modules. Are both BAT_CHARG_PWR -SOBDM and BAT_CHARG_PWR -BECM PIDs showing a value 0?
(1). Yes - this article does not apply. Refer to Workshop Manual (WSM) for normal diagnostics.
(2). No - proceed to Step 2.
2. Reprogram the PCM using the latest software level of the Ford Diagnosis and Repair System (FDRS) scan tool.
3. Check the availability of software updates on the following modules and update as required:
(1). SOBDM
(2). BECM
(3). SOBDMB
(4). SOBDMC
(5). ABS module

NOTE: Only one module may be updated at a time.

Shayne · Jan 12, 2024

Do you know the power-up number this TSB will install?

-20C this morning coldest yet and it woke itself up 3 hours ago to auto preconditioned. Working well. Remote departure scheduling flawless so far this winter.

Slow charging when always plugged in because of the cold does not hurt as it never goes below 50% for us this time of the year. In the spring it starts to get run down, charged back up and to a 100% a couple of times for trips. Spring works.

Service Procedure
1. With the ignition on and vehicle not plugged into an EVSE.

Assume the same requirement for the OTA?

Murse-In-Airy · Jan 12, 2024

Shayne said:
Do you know the power-up number this TSB will install?

-20C this morning coldest yet and it woke itself up 3 hours ago to auto preconditioned. Working well. Remote departure scheduling flawless so far this winter.

Slow charging when always plugged in because of the cold does not hurt as it never goes below 50% for us this time of the year. In the spring it starts to get run down, charged back up and to a 100% a couple of times for trips. Spring works.

Service Procedure
1. With the ignition on and vehicle not plugged into an EVSE.

Assume the same requirement for the OTA?

I wonder if this will fix the charging issue you and I have of not being able to charge at 40 amps.

Shayne · Jan 12, 2024

Murse-In-Airy said:
I wonder if this will fix the charging issue you and I have of not being able to charge at 40 amps.

Hoping so as mine was working great until a software update so software can fix it. Not sure true if slow charging since day one?

Either way the slow charging is acknowledge and if the software is not the fix they are to proceed to diagnose it as per WSM.

Gimme_my_MME · Jan 12, 2024

You can test, are you able to charge on L1? If so, this is not the fix for you

Shayne · Jan 12, 2024

Gimme_my_MME said:
You can test, are you able to charge on L1? If so, this is not the fix for you

Not sure but will try next time it needs charging. I will plug in the ford mobile and press charge to 100% for a bit. What should we see if it does not charger on L1? Lose of charge, red ring? How long should it be left charging on L1 to be sure?

Gimme_my_MME · Jan 12, 2024

Do you gain SOC on L1 or not is the question

ChasingCoral · Jan 12, 2024

Shayne said:
Do you know the power-up number this TSB will install?

There isn't a PowerUp to solve this issue yet. Since charging is such a critical issue, I'm betting that's why they have gone the TSB route instead. It is likely Ford will focus on fixing the PowerUp that is causing the problem for some folks.

For example, if 6.6.0 was causing the issue, they might issue a 6.6.1 that doesn't cause the charging problem.

alpine_shredder · Jan 12, 2024

Does anyone know if this is separate from the issue with late-year 2023s making a continuous hum during charging and seemingly not fully disabling the charging process after reaching the goal SOC (blue ring on charge port never shuts off, FordPass indicates power is still being drawn).

It seems like the charging issues have similarities but are not completely the same? My car’s build date is after 24-Jun-2023, which makes me think the issue with late-year 2023s is separate and this will not apply?

Gimme_my_MME · Jan 12, 2024

alpine_shredder said:
which makes me think the issue with late-year 2023s is separate and this will not apply?

That is correct, this is a separate issue

alpine_shredder · Jan 12, 2024

Gimme_my_MME said:
That is correct, this is a separate issue

Thanks for clarifying. Any idea when/if a fix is coming (have to ask, if no info totally understand)?

DGMach-E · Jan 12, 2024

I am glad I checked in this forum as I have been getting the same issue since the last update. When plugged into a level 1, I might get a 3% charge over 15 hours which is not normal. As explained above, I also saw a decrease, so I am hoping they can provide an update to get this fixed. I was just at the dealer yesterday to get the Emergency Brake fault fixed and I asked them about the slow charge issue. They could not find anything in their system regarding this and asked me to make another service appointment.

MellowJohnny · Jan 12, 2024

Murse-In-Airy said:
I wonder if this will fix the charging issue you and I have of not being able to charge at 40 amps.

I'm having the same problem. Dealership explicitly said the internal Ford Helpline their Tech used told them my issue was related to this (I'm not so sure...) so I'll be scheduling a service appointment for sure.

If it is the fix, great. If not, they'll need to keep troubleshooting it now rather than sending me home and asking me to wait for a software fix.

Here's the thread I've been keeping notes in - ignore the title, it's likely not an EVSE problem:

https://www.macheforum.com/site/threads/defective-chargepoint-home-flex-psa.31839/

Murse-In-Airy · Jan 12, 2024

@Gimme_my_MME Thanks for the clarification. I’ll test the wife’s car on L1 tomorrow.

Runningslow · Jan 12, 2024

alpine_shredder said:
Does anyone know if this is separate from the issue with late-year 2023s making a continuous hum during charging and seemingly not fully disabling the charging process after reaching the goal SOC (blue ring on charge port never shuts off, FordPass indicates power is still being drawn).

It seems like the charging issues have similarities but are not completely the same? My car’s build date is after 24-Jun-2023, which makes me think the issue with late-year 2023s is separate and this will not apply?

FordPass has a bug where energy added will continue to increase after charging has stopped. It isn't uncommon for me to have over 100kW added according to FordPass on the weekend if I don't unplug until the afternoon. The kW used on my Emporia charger is accurate based on the % remaining on the HVB when I plug in plus some overhead for loss.

TSB 24-2010 - Slow Level 1 or Level 2 Charging Or Does Not Charge

Mach-Lee

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