W T E C I I I E L E C T R O N I C C O N T R O L S T R O U B L E S H O O T I N G M A N U A L
Main code 65 indicates the vehicles engine horsepower/governor speed rating is too high. This code is set only
when computer-controlled engines are used. Code 65 means the engine computer is able to tell the transmission,
the engine horsepower and/or governor speed is beyond the transmission rating or does not match the transmission
When a code 65 is set, no shifts out of neutral are allowed. It is possible the transmission calibration selected for
this engine is improper. Contact local Allison Transmission Division distributor for assistance in selecting a proper
If the engine is beyond transmission ratings, contact the vehicle OEM for correction. The local ATD regional
representative may also be contacted for assistance.
This code cannot be cleared until the proper level engine is installed or the transmission is properly calibrated.
CODE 65 XX ENGINE RATING HIGH