New Holland fault codes & repair guides
All 7,052 codes· 50 per page · page 50 of 142
| Code | Controller | Issue summary | Repair manual |
|---|---|---|---|
| 3957 | ENGINE | COM1 Output Short to Ground or TWV1 or 3 Output Short to Ground | Full repair manual for code 3957, ENGINE |
| 3958 | — | Injector 1 And 4 - Open Circuit Amber | Full repair manual for code 3958 |
| 3958 | ENGINE | COM1 Output Open Load Both TWV1 and TWV3 Open Load | Full repair manual for code 3958, ENGINE |
| 3959 | — | Injector 2 And/Or 3 - Shorted To High | Full repair manual for code 3959 |
| 3959 | ENGINE | COM2 Output Short to Battery or TWV2or4 Output Short to Battery | Full repair manual for code 3959, ENGINE |
| 3960 | — | Injector 2 And/Or 3 - Shorted To Low Source Amber | Full repair manual for code 3960 |
| 3960 | ENGINE | COM2 Output Short to Ground or TWV2or4 Output Short to Ground | Full repair manual for code 3960, ENGINE |
| 3961 | — | Injector 2 And 3 - Open Circuit Amber | Full repair manual for code 3961 |
| 3961 | ENGINE | COM2 Output Open Load Both TWV2 and TWV4 Open Load | Full repair manual for code 3961, ENGINE |
| 3962 | — | Supply Pump Control Valve (Suction Control Valve) Stuck Amber | Full repair manual for code 3962 |
| 3962 | ENGINE | Supply Pump Control Valve (Suction Control Valve) Stuck | Full repair manual for code 3962, ENGINE |
| 3963 | — | Actual Rail Pressure Above Target | Full repair manual for code 3963 |
| 3963 | ENGINE | Supply Pump Protection Fault | Full repair manual for code 3963, ENGINE |
| 3964 | — | Actual Rail Pressure Is Excessive Amber | Full repair manual for code 3964 |
| 3964 | ENGINE | Supply Pump Exchange Fault | Full repair manual for code 3964, ENGINE |
| 3965 | — | Engine Stop Switch Stuck Closed | Full repair manual for code 3965 |
| 3965 | ENGINE | Engine Stop Switch Stuck Closed | Full repair manual for code 3965, ENGINE |
| 3966 | — | Water In Fuel Filter Failure | Full repair manual for code 3966 |
| 3966 | ENGINE | Water in Fuel Filter Failure | Full repair manual for code 3966, ENGINE |
| 3968 | — | Incorrect Injector Codes Engine | Full repair manual for code 3968 |
| 3969 | — | Invalid Injector Codes Engine | Full repair manual for code 3969 |
| 3970 | — | ECU Memory Fault Red | Full repair manual for code 3970 |
| 3971 | ENGINE | Check Sum Error - Flash area | Full repair manual for code 3971, ENGINE |
| 3972 | — | Intake Throttle Motor Driver Circuit Invalid Amber | Full repair manual for code 3972 |
| 3972 | ENGINE | Intake Throttle Motor Driver Circuit Invalid | Full repair manual for code 3972, ENGINE |
| 3973 | — | EGR Valve Position Does Not Match The Target Position | Full repair manual for code 3973 |
| 3973 | ENGINE | EGR Valve Energizing Duty Error | Full repair manual for code 3973, ENGINE |
| 3974 | — | EGR Motor Signal Shorted To Power Or Ground | Full repair manual for code 3974 |
| 3974 | ENGINE | EGR Duty Motor Status Error | Full repair manual for code 3974, ENGINE |
| 3975 | — | Intake Throttle Valve Stuck | Full repair manual for code 3975 |
| 3975 | ENGINE | Intake Throttle Stuck Error | Full repair manual for code 3975, ENGINE |
| 3978 | ENGINE | Particulate Matter Catalyst: High Flow Resistance Detected | Full repair manual for code 3978, ENGINE |
| 3979 | ENGINE | Particulate Matter Catalyst: Signal Range Check Flow Resistance of the Particulate Filter - Very High | Full repair manual for code 3979, ENGINE |
| 3981 | ENGINE | Diesel Oxidation Catalyst IN Temperature under 220 °C during regeneration | Full repair manual for code 3981, ENGINE |
| 3985 | — | Engine ECU Temperature Too High Red | Full repair manual for code 3985 |
| 3985 | ENGINE | Engine ECU Temperature is High | Full repair manual for code 3985, ENGINE |
| 3986 | — | Fuel Solenoid Short Circuit Red | Full repair manual for code 3986 |
| 3986 | ENGINE | Linear Solenoid: High Current | Full repair manual for code 3986, ENGINE |
| 3988 | — | Fuel Solenoid Position Sensor High Voltage Red | Full repair manual for code 3988 |
| 3988 | ENGINE | Fuel Pump Rack Position Sensor: Output Voltage High | Full repair manual for code 3988, ENGINE |
| 3989 | — | Aftertreatment Burner Injector 1 Short Circuit Red | Full repair manual for code 3989 |
| 3989 | ENGINE | Burner Injector 1 Error: High Current | Full repair manual for code 3989, ENGINE |
| 3990 | — | Aftertreatment Burner Injector 2 Short Circuit Red | Full repair manual for code 3990 |
| 3990 | ENGINE | Burner Injector 2 Error: High Current | Full repair manual for code 3990, ENGINE |
| 3991 | — | Engine ECU Relay Output Power Short Circuit Red | Full repair manual for code 3991 |
| 3991 | ENGINE | Terminal B4 High Current (Relay and lamp terminal) Fault | Full repair manual for code 3991, ENGINE |
| 3992 | — | Diesel Particulate Filter Soot Level Full Red | Full repair manual for code 3992 |
| 3993 | — | DPF Intake Temperature Higher Than 800 deg C | Full repair manual for code 3993 |
| 3993 | ENGINE | Diesel Particulate Filter (DPF) IN Temperature is over 800 °C | Full repair manual for code 3993, ENGINE |
| 3994 | — | DOC Intake Temperature Higher Than 800 deg C Red | Full repair manual for code 3994 |
