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Service bulletin SB20-J-001

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 id10178751
Published by NHTSA2020-08-24
Manufacturer's numberSB20-J-001
Manufacturer's date2020-07-01
NHTSA componentFUEL SYSTEM, GASOLINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

NHTSA's summary

SOME CUSTOMERS MAY EXPERIENCE A WHISTLING OR WHINING NOISE COMING FROM THE ENGINE IN THE AREA OF THE EXHAUST MANIFOLD. ADDITIONALLY, A CHECK ENGINE LIGHT WITH DTC'S P0402 EXHAUST GAS RECIRCULATION (EGR) FLOW EXCESSIVE AND/OR P2457 EGR COOLING SYSTEM PERFORMANCE MAY BE SET. IF YOU DETERMINE THAT AN EXHAUST LEAK EXISTS AT THE EGR DUCT FLANGE WHERE IT ATTACHES TO THE EXHAUST MANIFOLD (SEE FIGURE 1) PERFORM THE FOLLOWING SERVICE PROCEDURE.

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, Exhaust and emissions, Fuel system

Trouble codes named

P0402, P2457

Vehicles listed
ISUZU F-SERIES2018 to 2020

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