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Service bulletin TSB210013-020520

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10188846
Published by NHTSA2021-03-15
Manufacturer's numberTSB210013-020520
Manufacturer's date2021-02-05
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

This Technical Service Bulletin describes the verification and resolution of miswiring of the diesel exhaust fluid pump wiring harness. Harness is mis-wired such that the DEF pump return input at the controller is receiving continuous 24 VDC from an erroneous wire. This is an update to a previously submitted communication.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
CUMMINS CUMMINS

Listing a model year does not mean every vehicle of it is concerned: the document says which.