WHAT TO DO NEXT
P840 0 - VEHICLE OVERSPEED
P84 11 - VEHICLE OVERSPEED (ABSOLUTE)
This chart is only to be used if:
All basic mechanical checks and physical inspections have been performed with no problem found, and
2) Diagnosis of DDEC-III was started at step Start-1, pg 3-345.41 and you have now been referred here.
These codes Indicate the vehicle
speed has exceeded the limits
programmed into the ECM. Verify
cruise control/VSS information.
Change 3 3-345.373