Service bulletin 21-027-14

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

Flash: MIL Illumination For P0733, P061B, P1DB8 This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software. The following Transmission Control Module (TCM) calibration improvements are available. ? P0733 Gear 3 Shift Incorrect Ratio ? P061B Internal Control Module Torque Calculation Performance ? P1DB8 Due to erroneous DTC ? Improved downshift response in Adaptive Cruise Control (ACC) operation when there is a driver override.

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, Transmission and driveline

Trouble codes named

P061B, P0733, P1DB8

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

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

• Bulletins for another vehicle
• Report an error on this page
• Report an error by email