BI-Fuel/CNG Vehicle Only U Codes

The following codes are for Bifuel vehicles only produced by the Alternative Fuel Control Module (AFCM).

U1011 - SCP Invalid/Missing Engine Air Intake Data
U1071 - SCP Invalid/Missing Engine Sensor Data
U1073 - SCP Invalid/Missing Data for Eng Coolant
U1260 - SCP Single Ended (+) Ckt Failure
U1261 - SCP Single Ended (-) Ckt Failure
U1262 - SCP Communication Bus Fault
U1341 - SCP Invalid/Miss Data for Read Veh Spd
U2015 - Signal Link Fault (Non SCP)