# Service bulletin IB23\-J\-002

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: 10238690
- Published by NHTSA: 2023\-07\-05
- Manufacturer's number: IB23\-J\-002
- Manufacturer's date: 2023\-06\-30
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Some technicians, while diagnosing a Check Engine Malfunction Indicator Light \(MIL\) illumination or other customer complaint, have reported finding DTCs U2100 and/or U2105 listed as "History" codes. If these codes are "History" codes, they are not the reason for an MIL illumination or other vehicle related concerns. These codes may occur when the key is turned on but will not activate an MIL. However, because these codes were found, they have led technicians to perform unnecessary diagnoses and repairs that have extended vehicle downtime and created costs that were not warrantable. The purpose of this bulletin is to remind technicians to perform diagnostic steps only for "Active/Current" U2100/U2105 codes. If these codes are "Inactive/History," please ignore them and focus your diagnosis on DTC's that are "Active/Current" and related to the illumination of the MIL and/or the customer's specific complaint.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10238690-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10238690-9999.pdf)

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

## Components

Engine

## Trouble codes named

U2100, U2105

## Vehicles listed

- 2022 ISUZU N\-SERIES

JSON: [/v1/bulletins/10238690](/v1/bulletins/10238690)

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