ISUZU

SB18-L-002B

2021-02-10 · NHTSA 10189217

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

SOME CUSTOMERS MAY EXPERIENCE AN ILLUMINATED MALFUNCTION INDICATOR LIGHT (MIL) WITH DTC P20EE DIESEL EXHAUST FLUED (DEF) SYSTEM NOX TRAP LOW EFFICIENCY SET WITHOUT AN APPARENT CAUSE. NEW CALIBRATIONS FOR THE DEF CONTROL UNIT (DCU) HAVE BEEN DEVELOPED TO ADDRESS THIS CONCERN. FOLLOW THE DIAGNOSTIC FOR THIS DTC. IF NO FAULT CAN BE FOUND WHEN PERFORMING THE NORMAL DIAGNOSIS, FOLLOW THE SERVICE PROCEDURE IN THIS BULLETIN TO REPROGRAM THE DEF CONTROL MODULE.

Repeated filings are grouped only when make, bulletin number, publication date and complete summary agree. Original record numbers are retained. Older publications remain available, and an explicit later version is shown when established. Pre-1994 vehicle associations are separated from default results; an unspecified year does not mean all model years apply.