Case IH fault codes & repair guides
All 9,847 codes· 50 per page · page 74 of 197
| Code | Controller | Issue summary | Repair manual |
|---|---|---|---|
| 3922 | Engine Control Module (ECM) / EDC (Electronic Diesel Control) | Fuel pressure control Metering unit: Fuel rail pressure below limit with MeUn Control with empty tank | Full repair manual for code 3922, Engine Control Module (ECM) / EDC (Electronic Diesel Control) |
| 3923 | Engine Control Unit (ECU) / EDC | Fuel pressure control Metering unit: Fuel Rail pressure above maximum limit with MeUn Control with empty tank | Full repair manual for code 3923, Engine Control Unit (ECU) / EDC |
| 3924 | Engine Control Unit (ECU) / EDC | Fuel pressure control Metering unit: Fuel Rail pressure above maximum limit with MeUn Control (second stage) with empty tank | Full repair manual for code 3924, Engine Control Unit (ECU) / EDC |
| 3925 | Engine Control Unit (ECU) / EDC (Electronic Diesel Control) | Fuel pressure control Metering unit: Too low fuel rail pressure in fast transient condition with MeUn Control with empty tank. | Full repair manual for code 3925, Engine Control Unit (ECU) / EDC (Electronic Diesel Control) |
| 3926 | Engine Control Unit (ECU) / EDC (Electronic Diesel Control) | Fuel pressure control Metering unit: Leakage in overrun with empty tank. | Full repair manual for code 3926, Engine Control Unit (ECU) / EDC (Electronic Diesel Control) |
| 3927 | Engine Control Unit (ECU) | Fuel pressure control Metering unit: Leakage in high pressure system detected at idle an empty fuel tank | Full repair manual for code 3927, Engine Control Unit (ECU) |
| 3928 | Engine Control Unit (ECU) / EDC (Electronic Diesel Control) | Fuel pressure control Metering unit: Exceeding of a maximum peak pressure at empty fuel tank | Full repair manual for code 3928, Engine Control Unit (ECU) / EDC (Electronic Diesel Control) |
| 3929 | Engine Control Unit (ECU) / EDC (Electronic Diesel Control) | Fuel pressure control Pressure Relief valve: maximum rail pressure in limp home mode with PRV and empty fuel tank | Full repair manual for code 3929, Engine Control Unit (ECU) / EDC (Electronic Diesel Control) |
| 3930 | Engine Control Unit (ECU) | SCR inducement warning due to distance/time is active - Level 10 | Full repair manual for code 3930, Engine Control Unit (ECU) |
| 3931 | Engine Control Unit (ECU) | Info: SCR Inducement: Warning Block 4 activated | Full repair manual for code 3931, Engine Control Unit (ECU) |
| 3932 | Engine Control Unit (ECU) / EDC (Electronic Diesel Control) | Info: SCR Inducement: Warning Block 5 activated | Full repair manual for code 3932, Engine Control Unit (ECU) / EDC (Electronic Diesel Control) |
| 3933 | Engine Control Unit (ECU) / Electronic Diesel Control (EDC) | Info: SCR Inducement: Warning Block 6 activated | Full repair manual for code 3933, Engine Control Unit (ECU) / Electronic Diesel Control (EDC) |
| 3934 | Engine Control Unit (ECU) / Electronic Diesel Control (EDC) | Reserved For VCM (Vehicle Control Module) | Full repair manual for code 3934, Engine Control Unit (ECU) / Electronic Diesel Control (EDC) |
| 3935 | Engine Control Module (EDC / ECM) | Reserved For VCM (Vehicle Control Module) | Full repair manual for code 3935, Engine Control Module (EDC / ECM) |
| 3936 | Engine Control Unit (ECU) | ECU internal: Error Sensor supplies Voltage Tracker | Full repair manual for code 3936, Engine Control Unit (ECU) |
| 3937 | Engine Control Unit (ECU) | Air Temp in AFS: Signal range high on the duty cycle signal | Full repair manual for code 3937, Engine Control Unit (ECU) |
| 3938 | Engine Control Unit (ECU) | Air Temp in AFS: Signal range high on the period of PWM signal | Full repair manual for code 3938, Engine Control Unit (ECU) |
| 3939 | Engine Control Unit (ECU) / EDC (Electronic Diesel Control) | ECU Temperature Sensor: Physical Signal ECU Temperature second sensor above maximum limit | Full repair manual for code 3939, Engine Control Unit (ECU) / EDC (Electronic Diesel Control) |
| 3940 | Engine Control Module (ECM) / Engine Control Unit (ECU) | ECU Temperature Sensor: Physical Signal ECU Temperature second sensor below minimum limit | Full repair manual for code 3940, Engine Control Module (ECM) / Engine Control Unit (ECU) |
| 3941 | Engine Control Unit (ECU) / Electronic Diesel Control (EDC) | ECU Temperature Sensor: Signal above maximum limit. | Full repair manual for code 3941, Engine Control Unit (ECU) / Electronic Diesel Control (EDC) |
| 3942 | Engine Control Module (ECM) / Electronic Diesel Control (EDC) | Diagnostic Fault Check for Signal below minimum limit | Full repair manual for code 3942, Engine Control Module (ECM) / Electronic Diesel Control (EDC) |
| 3943 | Engine Control Unit (ECU) / Electronic Diesel Control (EDC) | Torque or speed control demand from Transmission Controller Retarder exceeding the maximum time | Full repair manual for code 3943, Engine Control Unit (ECU) / Electronic Diesel Control (EDC) |
| 3943-02 - DEC | DEC | PTO induced engine stall - data erratic, intermittent or incorrect | Full repair manual for code 3943-02 - DEC, DEC |
| 3944 | Engine Control Module (ECM / EDC) | Torque or speed control demand from VCM Retarder exceeding the maximum time. | Full repair manual for code 3944, Engine Control Module (ECM / EDC) |
| 3945 | Engine Control Unit (ECU) / EDC (Electronic Diesel Control) | Torque or speed control demand from ABS/ESR/ESP Retarder exceeding the maximum time. | Full repair manual for code 3945, Engine Control Unit (ECU) / EDC (Electronic Diesel Control) |
| 3946 | Engine Control Module (ECM) / EDC | Continuous negative torque control demand from Driveline Retarder exceeding the maximum time. | Full repair manual for code 3946, Engine Control Module (ECM) / EDC |
| 3947 | Engine Control Module (ECM) | Torque or speed control demand from PTO Retarder exceeding the maximum time | Full repair manual for code 3947, Engine Control Module (ECM) |
| 3948 | ENGINE | EGR Lift Sensor 1 Signal Too High | Full repair manual for code 3948, ENGINE |
| 3949 | Engine ECU | EGR Lift Sensor 1 Signal Too Low | Full repair manual for code 3949, Engine ECU |
| 3950 | Engine Control Unit (ECU) | EGR valve open/close stuck | Full repair manual for code 3950, Engine Control Unit (ECU) |
| 3950 | Engine Control Unit (ECU) / Engine Control Module (ECM) | EGR Valve Stuck Open/Closed | Full repair manual for code 3950, Engine Control Unit (ECU) / Engine Control Module (ECM) |
| 3950-00 - BCM | BCM | Tractor horn - too many loads or faulty load | Full repair manual for code 3950-00 - BCM, BCM |
| 3950-03 - BCM | BCM | Tractor horn - short circuit to B+ | Full repair manual for code 3950-03 - BCM, BCM |
| 3950-05 - BCM | BCM | Tractor horn - open circuit | Full repair manual for code 3950-05 - BCM, BCM |
| 3950-06 - BCM | Body Control Module (BCM) | Air Horn Circuit - Short circuit to ground | Full repair manual for code 3950-06 - BCM, Body Control Module (BCM) |
| 3951 | Engine Control Module (EDC / Engine ECU) | Physical Range check high (Exhaust Gas Temperature 1 Sensor Signal Too High) | Full repair manual for code 3951, Engine Control Module (EDC / Engine ECU) |
| 3951-14 - BCM | BCM | Tractor horn switch - invalid input voltage | Full repair manual for code 3951-14 - BCM, BCM |
| 3952 | Engine Control Unit (ECU / EDC) | Physical Range check low / Exhaust Gas Temperature 1 Sensor Signal Too Low | Full repair manual for code 3952, Engine Control Unit (ECU / EDC) |
| 3953 | Engine ECU | Exhaust Gas Temperature 2 Sensor Signal Too High | Full repair manual for code 3953, Engine ECU |
| 3954 | Engine Control Unit (ECU) / Engine Management System (EMS) | Intake Throttle valve actuator power stage: Open load | Full repair manual for code 3954, Engine Control Unit (ECU) / Engine Management System (EMS) |
| 3954 | Engine Control Unit (ECU) - ISM-DI (Perkins) or F5C | Exhaust Gas Temperature 2 Sensor Signal Too Low | Full repair manual for code 3954, Engine Control Unit (ECU) - ISM-DI (Perkins) or F5C |
| 3955 | ENGINE | Intake Camshaft Position (CMP) Sensor Performance Bank 1 / Camshaft Sensor Error - Invalid Signal | Full repair manual for code 3955, ENGINE |
| 3955 | ISM-DI | Camshaft Sensor Error - Invalid Signal | Full repair manual for code 3955, ISM-DI |
| 3956 | Engine Controller / Engine Control Unit (ECU) | Injector 1 And/Or 4 Shorted To High Source | Full repair manual for code 3956, Engine Controller / Engine Control Unit (ECU) |
| 3956 | Engine Control Unit (ECU) | COM1 Output Short to Battery TWV1or3 Output Short to Battery / Injector 1 And/Or 4 Shorted To High Source | Full repair manual for code 3956, Engine Control Unit (ECU) |
| 3957 | Engine Control Unit (ECU) | Injector 1 And/Or 4 Shorted To Low Source | Full repair manual for code 3957, Engine Control Unit (ECU) |
| 3958 | Engine Control Unit (ECU) | Intake Throttle Valve Actuator Short Circuit to Ground | Full repair manual for code 3958, Engine Control Unit (ECU) |
| 3958 | ISM-DI | Injector 1 And 4 - Open Circuit | Full repair manual for code 3958, ISM-DI |
| 3959 | Engine Control Module (ECM) / ISM-DI / EDC | ISM-DI Injector 2 And/Or 3 - Shorted To High Source | Full repair manual for code 3959, Engine Control Module (ECM) / ISM-DI / EDC |
| 3959 | Engine Control Unit (ECU) | Intake Throttle Valve Position is higher than expected | Full repair manual for code 3959, Engine Control Unit (ECU) |
