Service bulletin M1661

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.

NHTSA's summary

SERVICE BULLETIN M1661: INSTRUMENT REFLASH TO ADDRESS WOW TEST CONCERN. PURPOSE: This bulletin informs the dealer network, that if the vehicle's speed displayed on the Instrument Module (IM) becomes stuck during the WOW, it will self-correct once the vehicle comes to a stop. Then the speed will display correctly once the vehicle is put back into motion. A reflash is available in Digital Technician II (DT II), software version (24.12.4) or later for the affected Instrument modules that exhibit the concern.

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Throttle and cruise control

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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