Case IH fault codes & repair guides
All 9,847 codes· 50 per page · page 165 of 197
| Code | Controller | Issue summary | Repair manual |
|---|---|---|---|
| ARM79 | — | HITCH LOAD command potentiometer is failed | Full repair manual for code ARM79 |
| ARM89 | — | Aux 1st Remote Valve FLOW Potentiometer Failed | Full repair manual for code ARM89 |
| ARM99 | — | Aux 2nd Remote Valve FLOW Potentiometer Failed | Full repair manual for code ARM99 |
| ATC111 | — | Cab Sensor Open or Shorted to Power | Full repair manual for code ATC111 |
| ATC112 | — | Cab Sensor Shorted to Ground | Full repair manual for code ATC112 |
| ATC113 | — | Outlet Sensor Open or Shorted to Power | Full repair manual for code ATC113 |
| ATC114 | — | Outlet Sensor Shorted to Ground | Full repair manual for code ATC114 |
| ATC115 | — | Evaporator Sensor Open or Shorted to Power | Full repair manual for code ATC115 |
| ATC116 | — | Evaporator Sensor Shorted to Ground | Full repair manual for code ATC116 |
| ATC117 | — | Outside Air Sensor Open or Shorted to Power | Full repair manual for code ATC117 |
| ATC118 | — | Outside Air Sensor Shorted to Ground | Full repair manual for code ATC118 |
| ATC120 | — | Blower Speed Select Pot Open or Shorted to Power | Full repair manual for code ATC120 |
| ATC121 | — | Temperature Select Pot Circuit Issue | Full repair manual for code ATC121 |
| ATC122 | — | Mode Select Pot Open or Shorted to Power | Full repair manual for code ATC122 |
| ATC122 | — | Power Supply Circuit Issue for Mode Selection Potentiometer | Full repair manual for code ATC122 |
| ATC125 | — | High Pressure Switch (+) Input Shorted to Power | Full repair manual for code ATC125 |
| ATC126 | — | High Pressure Switch (+) Input Shorted to Ground | Full repair manual for code ATC126 |
| ATC127 | — | High Pressure Switch Input Shorted to Power | Full repair manual for code ATC127 |
| ATC128 | — | High Pressure Switch Input Shorted to Ground | Full repair manual for code ATC128 |
| ATC129 | — | High Pressure Switch Cyclic Error | Full repair manual for code ATC129 |
| ATC130 | — | Low Pressure Switch (+) Input Shorted to Power | Full repair manual for code ATC130 |
| ATC131 | — | Low Pressure Switch (+) Input Shorted to Ground | Full repair manual for code ATC131 |
| ATC132 | — | Low Pressure Switch Input Shorted to Power | Full repair manual for code ATC132 |
| ATC133 | — | Low Pressure Switch Input Shorted to Ground | Full repair manual for code ATC133 |
| ATC134 | — | Low Pressure Switch Open for More Than 1 Minute | Full repair manual for code ATC134 |
| c | Header Controller | Watchdog circuit failure | Full repair manual for code c, Header Controller |
| C | Electronic Hitch Control (EHC) Module | Upper limit circuit has failed | Full repair manual for code C, Electronic Hitch Control (EHC) Module |
| C (backwards C) | Hitch Control Module | Hitch Control Module Not Calibrated | Full repair manual for code C (backwards C), Hitch Control Module |
| CF | Transmission Control Unit (TCU) | Calibration Procedure Completed Successfully | Full repair manual for code CF, Transmission Control Unit (TCU) |
| CH | Transmission Controller (TCU) and Electronic Instrument Cluster (EIC) | Oil Temperature Above 105 Degrees Centigrade | Full repair manual for code CH, Transmission Controller (TCU) and Electronic Instrument Cluster (EIC) |
| CL | Transmission Control Module (TCM) | Oil Temperature Between 10 and 59 Degrees Centigrade | Full repair manual for code CL, Transmission Control Module (TCM) |
| CODE1002 | — | Hitch Lift Valve Winding Circuit Failure | Full repair manual for code CODE1002 |
| CP | Transmission Control Module (TCM) | Clutch Pedal required | Full repair manual for code CP, Transmission Control Module (TCM) |
| DCU19001 | — | Battery Voltage Sensing Signal High | Full repair manual for code DCU19001 |
| DCU19010 | — | Temperature sensor after catalyst signal high | Full repair manual for code DCU19010 |
| DCU19011 | — | Temperature sensor after catalyst signal low | Full repair manual for code DCU19011 |
| DCU19019 | — | Temperature Sensor Before Catalyst Signal High | Full repair manual for code DCU19019 |
| DCU19020 | — | Temperature Sensor Before Catalyst Signal Low | Full repair manual for code DCU19020 |
| DCU19082 | — | Voltage Supply 3 - Coolant Control Valve and Reverting Valve (UB3) Electrical Short to Battery | Full repair manual for code DCU19082 |
| DCU19084 | — | Voltage supply 3 -Coolant control valve and reverting valve (UB3) electrical short circuit to ground | Full repair manual for code DCU19084 |
| DCU19110 | — | UREA Temperature Sensor in Tank: Signal Low | Full repair manual for code DCU19110 |
| DCU19145 | — | Dosing Valve (electrical) Short Circuit to Batt + | Full repair manual for code DCU19145 |
| DCU19148 | — | Dosing Valve (electrical) Pressure Too High | Full repair manual for code DCU19148 |
| DCU19154 | — | UREA Pump Speed Issue | Full repair manual for code DCU19154 |
| DCU19155 | — | UREA Pump speed indicates pump motor blocked | Full repair manual for code DCU19155 |
| DCU19156 | — | UREA Pump Speed Exceeds Limit | Full repair manual for code DCU19156 |
| DCU19157 | — | UREA Pump Speed Issue | Full repair manual for code DCU19157 |
| DCU19262 | — | Tank Heating Valve Short Circuit to Battery | Full repair manual for code DCU19262 |
| DCU19264 | — | Tank heating Valve - Open circuit | Full repair manual for code DCU19264 |
| DCU19289 | — | Catalyst Temperature Sensor Circuit Range/Performance Issue | Full repair manual for code DCU19289 |
