Allison WTEC II Fault Code: 69 PID: SPN: 33 FMI: ECU, Computer Operating Properly (COP) timeout

Main code 69 indicates the ECU has malfunctioned. ECU, open driver, C solenoid circuit

To assist in tracking ECU reliability, the subcode has been included to indicate the cause of the ECU malfunction. Most codes, except Code 69 34, can be cleared; but they will probably recur. Replacing the ECU corrects the problem.

A ?cateyes? display may occur with subcode 33 if a remote ECU is used, or a blank display may occur if the ECU is integral to the shift selector.