DDEC III/IV Single ECM Troubleshooting – Section 72.1 Description of Flash Code 72

Section 72.1
Description of Flash Code 72

Flash Code 72 indicates that the vehicle speed signal to the ECM (with fueling to the engine) has exceeded the vehicle speed limit that is defined in the ECM calibration. See Figure "ECM" .‪

Flash Code 72 also may indicate that the vehicle speed signal to the ECM (without fueling to the engine) has exceeded a secondary vehicle speed limit that is defined in the ECM calibration.‪