Non Safety Campaign: Vehicles were built with a 5 bolt supply wire for the air dryer pressure sensor that...
Peterbilt technical service bulletin 34-074 for 2017-2020 Peterbilt 520.
- Bulletin number
- 34-074
- Component
- Electrical system
- Summary
- Non Safety Campaign: Vehicles were built with a 5 bolt supply wire for the air dryer pressure sensor that is no longer required with current architecture. If left in place, a fault code P1644 may be set.
Vehicles covered
- Peterbilt 520 2017-2020 2017201820192020
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