# Service bulletin IB19K001

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: 10154752
- Published by NHTSA: 2019\-03\-18
- Manufacturer's number: IB19K001
- Manufacturer's date: 2019\-02\-07
- NHTSA component: POWER TRAIN

## NHTSA's summary

THE CHECK TRANS LIGHT MAY ILLUMINATE IN THE AFFECTED VEHICLES WITHOUT ANY APPARENT TRANSMISSION CONCERNS. THE TRANSMISSION CONTROL MODULE \(TCM\) IS PROGRAMMED BY ALLISON TO PREDICT THE NEED FOR TRANSMISSION MAINTENANCE RELATING TO THE OIL LIFE MONITOR, FILTER LIFE MONITOR, AND TRANSMISSION HEALTH MONITOR. IN ORDER TO PROTECT THE TRANSMISSION ASSEMBLY, THE CHECK TRANS LIGHT WILL ILLUMINATE WHEN SERVICE INTERVALS EXCEED ALLISON'S RECOMMENDATIONS. NOTE: THE MOST COMMON DIAGNOSTIC TROUBLE CODE ASSOCIATED WITH THE ILLUMINATION OF THE CHECK TRANS LIGHT IS DTC P088B\-TRANSMISSION FILTER DETERIORATION. IF THE CHECK TRANS LIGHT IS GOING ON WITHOUT ANY APPARENT TRANSMISSION CONCERNS, PLEASE REFER THE CUSTOMER TO THEIR CLOSEST ALLISON AUTHORIZED REPAIR LOCATION. TO ASSIST THE CUSTOMER IN LOCATING THE CLOSEST ALLISON AUTHORIZED REPAIR LOCATION, PLEASE GO TO \(OR RECOMMEND THE CUSTOMER GO TO\) www.allisontransmission.com/sales\-service\-locator. THIS CONDITION IS MAINTENANCE\-RELATED AS RECOMMENDED IN THE ALLISON TRANSMISSIONS OPERATOR'S MANUAL AND IS NOT COVERED UNDER ISUZU'S NEW VEHICLE WARRANTY.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10154752-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10154752-9999.pdf)

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

## Components

Transmission and driveline

## Trouble codes named

P088B

## Vehicles listed

- ISUZU F SERIES

JSON: [/v1/bulletins/10154752](/v1/bulletins/10154752)

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