# C0550 on the 2004 Isuzu Ascender

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name C0550

- [10014783](https://open.wenmarpro.com/bulletins/10014783), 2005-05-10: SERVICE 4WD LIGHT ON 4WD INOPERATIVE HARSH ENGAGEMENT OF 4WD NO COMMUNICATION WITH TCCM DTC C0550 SET. \*EH