Service bulletin 0503003

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)
Type	Service bulletin
NHTSA id	10016405
Published by NHTSA	2005-09-12
Manufacturer's number	0503003
Manufacturer's date	2005-08-01
NHTSA component	ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

NHTSA's summary

REVISED INSPECTION/MAINTENANCE (I/M) EVAPORATIVE EMISSION (EVAP) SYSTEM SET PROCEDURE (SERVICE MANUAL REVISION). *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Exhaust and emissions

Vehicles listed
ISUZU ASCENDER	2003, 2004

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

Other bulletins for the same vehicles and component
IB09-X-004C	2022-08-02. Service bulletin. The Isuzu Commercial Truck of America (ICTA) Service Technical Assistance Center (TAC) provides diagnostic support to Isuzu dealer technicians repairing Isuzu vehicles in and out of vehicle warranty. A TAC case number will be issued solely for information tracking purposes and future contact reference.
22NA009	2022-05-31. Service bulletin. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
16NA383	2020-06-22. Service bulletin. This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
PIP5540B	2019-03-18. Service bulletin. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
PIP4925B	2019-03-18. Service bulletin. This preliminary information document communicates a tip on the way to diagnose possible induction or exhaust air leaks using the evaporative emission cart smoke machine and ultrasonic leak detector tools.
PIP5540D	2019-03-11. Service bulletin. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
PIP5628	2019-03-11. Service bulletin. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
PIP5232	2018-05-07. Service bulletin. This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.
PIP5232B	2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about gasoline powered cars, mid-size trucks, light duty trucks, and heavy duty trucks with premature catalytic converter failures. It is recommended to inspect for a poor crimp on the grounds ring terminal at the engine block for the bank with the concern and repair the wire.
PIT3173C	2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician that fluid contamination may be directed to one of the following testing centers according to the type of fluid needing testing. Dealer should send the correct fluid to the proper testing center.