NHTSA campaign 21V181000 · Manufacturer campaign 21PBC
Peterbilt Recall 21V-181: Engine Control Module Calibrated Incorrectly
NHTSA recall 21V181000 (Manufacturer campaign 21PBC) was reported by PACCAR Incorporated on March 16, 2021, with 1 vehicle potentially affected (per NHTSA). NHTSA's record lists the Peterbilt 536 for the 2021 model year. Owners were notified on March 3, 2021, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 21V181000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 21V181000 (also written 21V-181 or 21V181)
- Filed by
- PACCAR Incorporated
- Manufacturer campaign number
- 21PBC
- Report received
- Potentially affected
- 1 vehicle (per NHTSA)
- Component
- Engine and Engine Cooling — Engine — Engine Control Module (ECU/ECM) — Software
- Owners notified
Repair completion: 100% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 21V181000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
Peterbilt
Peterbilt 536
NHTSA's recall notice
As NHTSA's recall record states it for campaign 21V181000.
Defect description
PACCAR Incorporated (PACCAR) is recalling one 2021 Peterbilt 536 vehicle equipped with a Cummins Westport Inc. B6.7N engine that has certain engine control module calibrations. The engine control module software may be calibrated incorrectly, causing the engine to not limit engine speed or torque as intended for certain safety-related functions such as vehicle braking, traction and stability control, speed control, or collision avoidance.
Safety consequence
If safety-related functions such as vehicle braking, stability, speed, and collision avoidance do not function properly, it can increase the risk of a crash.
Manufacturer remedy
PACCAR owns the vehicle affected, and it was repaired as of March 3, 2021. Owners may contact PACCAR customer service at 1-940-591-4220. PACCAR's number for this recall is 21PBC.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Sources
Official NHTSA notice for recall 21V181000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.