Case IH fault codes & repair guides
All 9,847 codes· 50 per page · page 38 of 197
| Code | Controller | Issue summary | Repair manual |
|---|---|---|---|
| 2522 | UCM (Unit Control Module) or CCU (Central Control Unit) | R1 solenoid - open circuit or short circuit to ground | Full repair manual for code 2522, UCM (Unit Control Module) or CCU (Central Control Unit) |
| 2523 | UCM | F2 solenoid - circuit fault | Full repair manual for code 2523, UCM |
| 2523 (517974.11) - DEC | Universal Control Module (UCM) | F2 solenoid circuit fault | Full repair manual for code 2523 (517974.11) - DEC, Universal Control Module (UCM) |
| 2524 (517971.11) - DEC | UCM | R1 solenoid - circuit fault | Full repair manual for code 2524 (517971.11) - DEC, UCM |
| 2524 | Universal Control Module (UCM) or Transmission Controller / ECM | R1 solenoid - circuit fault | Full repair manual for code 2524, Universal Control Module (UCM) or Transmission Controller / ECM |
| 2525 | Transmission Control Unit (TCU) | F2/R1 synchronizer - neutral did not engage | Full repair manual for code 2525, Transmission Control Unit (TCU) |
| 2526 (519178.16) - DEC | Engine Control Module (ECM) / Engine Controller (ECPG) | DEC: Lube Oil Pressure Sensor - Lube High Pressure | Full repair manual for code 2526 (519178.16) - DEC, Engine Control Module (ECM) / Engine Controller (ECPG) |
| 2527 | Transmission Control Unit (TCU) / Electronic Control Module (ECM) | F4/R2 synchronizer potentiometer – signal too high | Full repair manual for code 2527, Transmission Control Unit (TCU) / Electronic Control Module (ECM) |
| 2528 | Transmission Control Module | F4/R2 synchronizer potentiometer – signal too low | Full repair manual for code 2528, Transmission Control Module |
| 2529 | UCM (Universal Control Module) | Synchro not moving towards F4 | Full repair manual for code 2529, UCM (Universal Control Module) |
| 2530 | Transmission Controller | Synchro not moving towards R2 | Full repair manual for code 2530, Transmission Controller |
| 2531 | Transmission Control Module (TCU / TRCU) | F4 solenoid open circuit or short circuit to ground | Full repair manual for code 2531, Transmission Control Module (TCU / TRCU) |
| 2532 | Transmission Controller | R2 solenoid – open circuit or short circuit to ground | Full repair manual for code 2532, Transmission Controller |
| 2533 | Transmission Control Unit (TCU) | F4 Solenoid Circuit Fault | Full repair manual for code 2533, Transmission Control Unit (TCU) |
| 2534 | Transmission Control Unit (TCU) | R2 solenoid circuit fault | Full repair manual for code 2534, Transmission Control Unit (TCU) |
| 2535 | Transmission Control Module (Transmission ECU / TCU) | F4/R2 synchroniser – neutral did not engage. | Full repair manual for code 2535, Transmission Control Module (Transmission ECU / TCU) |
| 2538 | UCM / TCM | Ring speed sensor – open circuit or short circuit to ground | Full repair manual for code 2538, UCM / TCM |
| 2539 | UCM or TCM | Ring speed sensor – short to 12V | Full repair manual for code 2539, UCM or TCM |
| 2540 (123.04) - DEC | UCM (Transmission Control Module / Central Control Unit) | Clutch A Pressure Sensor Signal Short to Ground or Open Circuit | Full repair manual for code 2540 (123.04) - DEC, UCM (Transmission Control Module / Central Control Unit) |
| 2540 | UCM (Unit Control Module) | A clutch pressure transducer – open circuit or short circuit to ground | Full repair manual for code 2540, UCM (Unit Control Module) |
| 2541 (5937.04) - DEC | Transmission Control Module (TCM) | Clutch B Pressure Transducer/Sensor Fault | Full repair manual for code 2541 (5937.04) - DEC, Transmission Control Module (TCM) |
| 2541 | UCM (User Control Module / Transmission Control Module) | B clutch pressure transducer – open circuit or short circuit to ground | Full repair manual for code 2541, UCM (User Control Module / Transmission Control Module) |
| 2542 (123.03) - DEC | Transmission Control Module (TCM) | A clutch pressure transducer – short circuit to 5V | Full repair manual for code 2542 (123.03) - DEC, Transmission Control Module (TCM) |
| 2542 | UCM (User Control Module) / Transmission Controller | A clutch pressure transducer – short circuit to 5V | Full repair manual for code 2542, UCM (User Control Module) / Transmission Controller |
| 2543 (5937.03) - DEC | Transmission Control Module (UCM / TECU) | Clutch B Pressure Sensor - Signal wire shortcut to Vsupply | Full repair manual for code 2543 (5937.03) - DEC, Transmission Control Module (UCM / TECU) |
| 2543 | UCM / CCU | B clutch pressure transducer – short circuit to 5V | Full repair manual for code 2543, UCM / CCU |
| 2544 | UCM (Universal Control Module) | Ring Sensor Critical Air Gap | Full repair manual for code 2544, UCM (Universal Control Module) |
| 2545 (191.01) - DEC | UCM (Universal Control Module) | Wheel speed (transmission output speed) sensor - critical air gap | Full repair manual for code 2545 (191.01) - DEC, UCM (Universal Control Module) |
| 2545 | UCM (User Control Module) or Transmission ECM | Wheel speed (transmission output speed) sensor - critical air gap | Full repair manual for code 2545, UCM (User Control Module) or Transmission ECM |
| 2547 | UCM (User Control Module) / Transmission Controller | No signal from ring sensor | Full repair manual for code 2547, UCM (User Control Module) / Transmission Controller |
| 2548 | UCM (Universal Control Module) | Brake pressure transducer – open circuit or short circuit to ground. | Full repair manual for code 2548, UCM (Universal Control Module) |
| 2549 | UCM (Universal Control Module) / Transmission and Chassis Controller | Brake pressure transducer – short to 12V | Full repair manual for code 2549, UCM (Universal Control Module) / Transmission and Chassis Controller |
| 2550 | Universal Control Module (UCM) or Central Control Unit (CCU) | Stuck dump solenoid or clutch A solenoid. | Full repair manual for code 2550, Universal Control Module (UCM) or Central Control Unit (CCU) |
| 2551 | Universal Control Module (UCM) or Central Control Unit (CCU) | Stuck dump solenoid or clutch B solenoid | Full repair manual for code 2551, Universal Control Module (UCM) or Central Control Unit (CCU) |
| 2552 | Universal Control Module (UCM) | Transmission oil pressure too high | Full repair manual for code 2552, Universal Control Module (UCM) |
| 2553 | UCM | Transmission oil pressure too low | Full repair manual for code 2553, UCM |
| 2554 | UCM (Unit Control Module) | Transmission oil pressure above maximum boost pressure. | Full repair manual for code 2554, UCM (Unit Control Module) |
| 2555 | Engine Control Module (ECM) / ENG | Intake Air Heater 1 Circuit Voltage too high | Full repair manual for code 2555, Engine Control Module (ECM) / ENG |
| 2555 | UCM | Transmission oil pressure below warning pressure | Full repair manual for code 2555, UCM |
| 2557 | UCM (Universal Control Module) or CCU (Central Control Unit) | Hydro 1 solenoid - open circuit or short circuit to ground | Full repair manual for code 2557, UCM (Universal Control Module) or CCU (Central Control Unit) |
| 2557 (1044.05) - DEC | UCM (Universal Control Module) or Transmission Controller | Hydro 1 Solenoid – Open circuit or short circuit to ground | Full repair manual for code 2557 (1044.05) - DEC, UCM (Universal Control Module) or Transmission Controller |
| 2558 (1044.15) - DEC | DEC | Hydro 1 solenoid – short circuit to 12V | Full repair manual for code 2558 (1044.15) - DEC, DEC |
| 2558 | Engine Control Module (ECM) | Auxiliary PWM Driver 1 Circuit Voltage too low | Full repair manual for code 2558, Engine Control Module (ECM) |
| 2558 | Universal Control Module (UCM) or Central Control Unit (CCU) | Hydro 1 solenoid – short circuit to 12V | Full repair manual for code 2558, Universal Control Module (UCM) or Central Control Unit (CCU) |
| 2559 | Transmission Controller or UCM (Universal Control Module) | ORPM and Ring sensor fault | Full repair manual for code 2559, Transmission Controller or UCM (Universal Control Module) |
| 2560 | Transmission Control Module | Uncommanded movement of synchroniser F1/F3 to neutral | Full repair manual for code 2560, Transmission Control Module |
| 2561 | UCM | Uncommanded F2/R1 Synchronizer Neutral | Full repair manual for code 2561, UCM |
| 2562 | Universal Control Module (UCM) | Uncommanded movement of synchronizer F4/R2 to neutral | Full repair manual for code 2562, Universal Control Module (UCM) |
| 2563 (519167.01) - DEC | UCM | HST Inlet (Hydro Gport) - Pressure Too Low | Full repair manual for code 2563 (519167.01) - DEC, UCM |
| 2563 | UCM (Universal Control Module) | HST inlet (hydro Gport) - pressure too low | Full repair manual for code 2563, UCM (Universal Control Module) |
