TM 10-3930-675-10 0020 00-39 ERROR CODES - CONTINUED 0020 00 Table 4. Error Codes - Continued. ERROR CODE DISPLAY LAYOUT DRIVER ACTION ERROR CODE EXPLANATION VEHICLE LIMITATIONS 1187 Stop Vehicle Press RESET. Finish mission. Notify maintenance. Warning - Degraded Operation Low  voltage  detected  on  ECM voltage   supply   line   to   some sensors Engine will run degraded. No protection for oil pressure. 1212 Stop Vehicle Press RESET. If error shows again, notify maintenance. Finish mission. Warning - Degraded Operation High   voltage   detected   at   oil temperature sensor circuit No engine protection for oil temperature. 1213 Stop Vehicle Press RESET. If error shows again, notify maintenance. Finish mission. Warning - Degraded Operation Low   voltage   detected   at   oil temperature sensor circuit No engine protection for oil temperature. 1214 Stop Vehicle Check oil level. Press RESET. If error remains, notify maintenance. Finish mission. Stop Vehicle Immediately Oil   pressure   signal   indicates temperature above critical threshold Reduced power and speed. 1221 Finish Mission Notify maintenance. Information/Maintenance High voltage detected at ambi- ent air pressure sensor circuit Reduced power and speed. 1222 Finish Mission Notify maintenance. Information/Maintenance Low  voltage  detected  at  ambi- ent air pressure sensor circuit Reduced power and speed. 1227 Stop Vehicle Press RESET. Finish mission. Notify maintenance. Warning - Degraded Operation High  voltage  detected  on  ECM voltage   supply   line   to   some sensors Engine will run degraded. No protection for oil pressure. 1234 Stop Vehicle Shut engine off/on. If code clears, resume mission. If code remains, notify maintenance. Stop Vehicle Immediately Engine  speed  signal  indicates engine speed greater than 2730 rpm Fuel shutoff valve is closed until engine speed drops. Fuel shutoff valve will open when engine speed falls below 2184 rpm.