2021 Peterbilt 220 technical service bulletins
21 technical service bulletins and manufacturer communications cover the 2021 Peterbilt 220.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- 5/29/2025: A new Ethernet Multiplexed Architecture (EMUX) Service Tool Kit service manual (SM034-022) has...
- Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting...
- Information Only Storage guideline procedures are now available for both Medium Duty and Heavy-Duty...
- Information Only New diagnostic tool is required to support PACCAR Ethernet Multiplexed Architecture...
- BEV Phase 2 tools have been added to the BEV required tools lists.
- 220EV Battery Electric Vehicles (BEV) rely on 12V batteries that act as a buffer when the converter cannot...
- On certain Peterbilt Model 220EV Battery Electric Vehicles (BEVs), timer 2 for the HED® Telematic device...
- Information Only Dealers/body builders installing lift gates onto Peterbilt Model 220EV BEV chassis must...
- Info Only
- The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
- A frame mounted left-hand marker light bracket interferes with the rear fuel tank fill location
- Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet...
- Information Only: Due to differences between the PACCAR MX-11 or MX-13 2021A and 2021B engines,...
- Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...
- Information Only
- Field Repair 515-1 Customer Letter
- Information Only – Windshield washer pumps have a high No Trouble Found rate
- Fix as Fail: Peterbilt has introduced an improved mounting bracket for low mount air tanks for vehicles...
- Fix as Fail: For all conventional models, except 387/587, equipped with Side-of-Cab (“SOC”) exhaust and...
- Information Only:
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