Technical Service Bulletin CB25-L-001 — 2025 ISUZU N-SERIES

ENGINE

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Bulletin Details

TSB ID CB25-L-001
Manufacturer
Vehicle 2025 ISUZU N-SERIES
Component ENGINE
Communication Date

Bulletin Summary

CUSTOMER SATISFACTION CAMPAIGN: IN SOME 2025MY ISUZU N-SERIES VEHICLES EQUIPPED WITH 5.2L (4HK1) DIESEL ENGINES, OPERATORS MAY EXPERIENCE AN ILLUMINATED CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) WITH DIAGNOSTIC TROUBLE CODE (DTC) P2201 NOX SENSOR CIRCUIT PERFORMANCE SENSOR 1. WE HAVE DETERMINED A CALIBRATION ERROR IS CAUSING THIS DTC TO SET. THIS DTC MAY BE RESOLVED BY REPROGRAMMING THE ENGINE CONTROL MODULE (ECM) AND DEF CONTROL UNIT (DCU) WITH REVISED CALIBRATIONS.

About Technical Service Bulletins

A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.

Other TSBs for the 2025 ISUZU N-SERIES

SB25-L-001A ENGINE
SB25-K-002 POWER TRAIN
CB25-G-003 ELECTRICAL SYSTEM
SB25-L-001 ENGINE
SB25-L-001 FUEL/PROPULSION SYSTEM
CB25-K-001A POWER TRAIN
SB25-K-001A POWER TRAIN
CB25-K-001 POWER TRAIN
V2501_DEALER NOTICE POWER TRAIN
IB19-R-002B ELECTRICAL SYSTEM
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