Recall 23V624 covers 19 2022-2023 Midwest Fire All-Poly Series fire trucks for software-driven loss of drive power. Midwest Fire provides reprogramming free.
Midwest Fire is recalling 19 2022-2023 All-Poly Series Tanker-Pumper fire trucks under recall 23V624 because a software error in the split-shaft transmission and Class 1 Es-Key multiplex system can shift the truck from road gear to pump gear. That shift can cause a sudden loss of drive power and increase crash risk, and Midwest Fire will update the software free of charge.
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What's wrong?
On 2022-2023 Midwest Fire All-Poly Series tanker-pumper fire trucks with a mid-ship pump, the Class 1 Es-Key multiplex system controls part of the truck's electrical programming. In this recall, it feeds the pump interlock module that keeps the split-shaft transmission in road gear while the truck is being driven. Road gear sends drive power to the rear axle; pump gear is for operating the pump.
The problem is software programming, not a broken gear inside the transmission. The Es-Key system was left powered through the park brake circuit instead of always-on power to the pump interlock module. During travel, that setup lets air pressure for the pump shift decrease. The transmission can shift out of road gear and into pump gear, cutting drive power to the rear axle.
There is no warning sign before failure. The first sign is the truck losing drive power while underway, after which the operator has to stop and return the system from pump gear to road gear.
Who's affected?
Both model years list automatic transmission and electrical-system software components tied to the same Class 1 Es-Key multiplex software.
| 2022 Midwest Fire All-Poly Series | automatic transmission |
|---|---|
| 2022 Midwest Fire All-Poly Series | electrical system software |
| 2023 Midwest Fire All-Poly Series | automatic transmission |
| 2023 Midwest Fire All-Poly Series | electrical system software |
| Units affected | 19 |
| Field incidents | NHTSA has logged 1 field incident to date. |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
A sudden loss of drive power can leave the vehicle unable to keep moving with traffic and increase the risk of a crash. If your VIN is included, schedule the software reprogramming promptly and use caution until the multiplex system update is complete. Repair is free at any franchised Midwest Fire dealer.
What should I do?
- Check your VIN to confirm your 2022-2023 Midwest Fire All-Poly Series is included in this recall.
- Contact Midwest Fire customer service to get the free USB and instructions for the multiplex software reprogramming.
- Reference recall number 23V624 when you call, and have the recall notice ready if Midwest Fire mailed one.
- Reprogram the Class 1 Es-Key multiplex software with the provided USB so the truck does not shift from road gear to pump gear and lose drive power.
- Drive cautiously until the update is complete, and remove the truck from service if it shifts unexpectedly or loses drive power.
What happens at the repair
Midwest Fire handles this as a software reprogramming repair. The company provides the USB cable and instructions at no charge. After the customer creates the required Hale Products account and downloads the ES-KeyPro II read only program to a desktop computer, a Midwest Fire technician logs in remotely and installs the updated Class1 multiplex system software. The repair is free, including the software reprogramming support.
Timeline
| September 7, 2023 | NHTSA published the recall |
|---|---|
| October 6, 2023 | Owner notification mailed |
| October 15, 2023 | Dealer notification ended |
| October 15, 2023 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| October 15, 2023 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 23V624?
Recall 23V624 covers 19 2022-2023 Midwest Fire All-Poly Series Tanker-Pumper fire trucks with split-shaft transmissions and Class 1 Es-Key multiplex systems. A software error can shift the truck from road gear to pump gear, causing loss of drive power. Midwest Fire provides the software reprogramming for free.
What should I do if my 2022-2023 Midwest Fire All-Poly Series is on this recall?
Check your VIN to confirm your specific fire truck is included in recall 23V624. If it is, contact Midwest Fire customer service at 1-800-344-2059 and ask for the USB and instructions to reprogram the multiplex system software. Reference recall 23V624 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to correct the safety defect at no cost. For recall 23V624, Midwest Fire will provide the USB and software reprogramming instructions free of charge.
What is the safety risk?
The safety risk is sudden loss of drive power. The software error can shift the truck from road gear to pump gear, and that loss of drive power can increase crash risk. Confirm your VIN, then arrange the free software reprogramming with Midwest Fire.
When were owners notified about recall 23V624?
Midwest Fire mailed owner notification letters on October 6, 2023. If you own a 2022-2023 Midwest Fire All-Poly Series fire truck and never received a letter, check your VIN and contact Midwest Fire customer service at 1-800-344-2059.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/23V624000 |
|---|---|
| Midwest Fire customer service | 1-800-344-2059 |
| NHTSA recall # | 23V624 |
| NHTSA recall # (full) | 23V624000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →