# Service bulletin SB24\-L\-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.

- Type: Service bulletin
- NHTSA id: 10249693
- Published by NHTSA: 2024\-02\-05
- Manufacturer's number: SB24\-L\-001
- Manufacturer's date: 2024\-01\-29
- NHTSA component: FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING

## NHTSA's summary

SERVICE BULLETIN: Some customers may experience an illuminated Malfunction Indicator Light \(MIL\) with DTC P20EE Diesel Exhaust Fluid \(DEF\) 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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249693-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249693-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Exhaust and emissions, Fuel system

## Trouble codes named

P20EE

## Vehicles listed

- 2022 to 2024 ISUZU N\-SERIES

JSON: [/v1/bulletins/10249693](/v1/bulletins/10249693)

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