This Preliminary Information communication provides information to the technician about vehicles that have...

Bulletin number

PIP5228B

Component

Engine and engine cooling: exhaust system: emission control: catalytic convertor

Summary

This Preliminary Information communication provides information to the technician about vehicles that have a vibration that is felt between 1200 ? 1400 engine revolutions per minute when in active fuel management V4 mode. Technician will need to use J?38792-A Electronic Vibration Analyzer 2 or CH?51450-NVH Pico Oscilloscope Diagnostic Kit to measure the frequency of the vibration. Technician will need to remove and replace the exhaust muffler clamp that joins the three-way catalytic converter assembly to the pipe of the muffler assembly. After the exhaust is reinstalled remove and reinstall each cab mounts and retest.

Owners of these vehicles have filed 292 complaints in the engine category.