# Service bulletin SB21L001

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: 10203309
- Published by NHTSA: 2021\-11\-08
- Manufacturer's number: SB21L001
- Manufacturer's date: 2021\-07\-01
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

DTC P225C CALIBRATION UPDATE ? REPROGRAM DEF CONTROL UNIT \(DCU\). Follow the diagnostic for this DTC. If no mechanical fault can be found during normal diagnosis, follow the service procedure in this bulletin to correct the concern.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203309-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203309-9999.pdf)

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

## Components

Engine

## Trouble codes named

P225C

## Vehicles listed

- 2021 ISUZU F\-SERIES

JSON: [/v1/bulletins/10203309](/v1/bulletins/10203309)

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