Campaign An MX-13 CARB Software update is available to improve reliability and uptime
Peterbilt technical service bulletin E322 - PB for 2025 Peterbilt 579, 2025 Peterbilt 567 and 2025 Peterbilt 589.
- Bulletin number
- E322 - PB (E322 - PB)
- Component
- Electrical system
- Summary
- Campaign An MX-13 CARB Software update is available to improve reliability and uptime. The software must be updated to NA-110C before releasing any chassis to the final customer. Certain Vehicle Model Year 2025 567, 579, and 589 chassis equipped with Engine Model Year (EMY) 2024 CARB MX-13 engines and NA-100C software may experience a Malfunction Indicator Lamp (MIL) due to a software issue. Without this update, a derate may occur. Campaign start date is 01/15/2025.
Vehicles covered
- Peterbilt 579 2025 2025
- Peterbilt 567 2025 2025
- Peterbilt 589 2025 2025
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