Solis tractors use a combination of dashboard warning lights and diagnostic error codes to alert operators about faults in the engine, transmission, hydraulic system, electrical system, emissions components, and sensors. Understanding these codes can help reduce downtime and prevent costly repairs.
Solis Tractor Error Codes
| Error Code | System | Meaning | Possible Causes | Recommended Solution |
|---|---|---|---|---|
| E001 | Engine | Engine coolant temperature high | Low coolant, blocked radiator, faulty thermostat | Check coolant level, clean radiator, inspect cooling system |
| E002 | Engine | Engine coolant temperature sensor fault | Damaged sensor or wiring | Inspect sensor and replace if necessary |
| E003 | Engine | Engine oil pressure low | Low oil level, worn oil pump, clogged filter | Check oil level and replace filter |
| E004 | Engine | Engine oil pressure sensor fault | Bad pressure sensor | Test and replace sensor |
| E005 | Fuel | Fuel pressure too low | Blocked fuel filter, weak fuel pump | Replace fuel filter and inspect fuel pump |
| E006 | Fuel | Fuel pressure too high | Faulty pressure regulator | Test fuel pressure regulator |
| E007 | Fuel | Water detected in fuel | Contaminated diesel | Drain water separator and refill clean fuel |
| E008 | Fuel | Fuel temperature sensor fault | Sensor failure | Replace fuel temperature sensor |
| E009 | Air Intake | Intake air temperature sensor fault | Wiring or sensor damage | Inspect electrical connections |
| E010 | Air Intake | Mass airflow sensor fault | Dirty or failed MAF sensor | Clean or replace MAF sensor |
| E011 | Turbocharger | Turbo boost pressure low | Air leak, damaged turbo | Inspect hoses and turbocharger |
| E012 | Turbocharger | Turbo overboost | Faulty wastegate or sensor | Inspect turbo control system |
| E013 | Engine | Crankshaft position sensor fault | Sensor failure | Replace crankshaft sensor |
| E014 | Engine | Camshaft position sensor fault | Faulty cam sensor | Replace sensor |
| E015 | Electrical | Battery voltage low | Weak battery or charging issue | Test battery and alternator |
| E016 | Electrical | Battery voltage high | Alternator regulator fault | Inspect charging system |
| E017 | Electrical | Alternator charging failure | Loose belt or alternator failure | Repair charging system |
| E018 | Electrical | Starter relay fault | Relay or wiring problem | Inspect starter circuit |
| E019 | Electrical | ECU communication error | Loose connectors or ECU issue | Check wiring harness |
| E020 | ECU | Internal ECU fault | ECU malfunction | Dealer diagnosis required |
| E021 | Exhaust | EGR valve malfunction | Carbon buildup or failed valve | Clean or replace EGR valve |
| E022 | Exhaust | EGR position sensor fault | Faulty sensor | Replace sensor |
| E023 | DPF | Diesel particulate filter clogged | Excessive soot | Perform regeneration |
| E024 | DPF | Regeneration failed | Interrupted regeneration | Repeat regeneration cycle |
| E025 | DPF | Exhaust temperature high | Heavy regeneration | Allow regeneration to complete |
| E026 | Emissions | NOx sensor fault | Failed NOx sensor | Replace sensor |
| E027 | Emissions | Oxygen sensor fault | Sensor failure | Replace oxygen sensor |
| E028 | DEF | DEF level low | Low DEF fluid | Refill DEF tank |
| E029 | DEF | DEF quality poor | Contaminated DEF | Drain and refill DEF |
| E030 | DEF | DEF pump fault | Failed pump | Inspect DEF system |
| E031 | Transmission | Transmission oil temperature high | Low oil or overload | Check transmission oil |
| E032 | Transmission | Transmission oil pressure low | Pump issue | Inspect transmission pump |
| E033 | Transmission | Transmission sensor fault | Failed sensor | Replace sensor |
| E034 | PTO | PTO speed sensor fault | Damaged sensor | Replace PTO sensor |
| E035 | PTO | PTO engagement fault | PTO clutch issue | Inspect PTO clutch |
| E036 | Hydraulic | Hydraulic oil temperature high | Dirty oil or overloaded system | Replace hydraulic oil |
| E037 | Hydraulic | Hydraulic pressure low | Pump wear or leak | Check hydraulic pump |
| E038 | Hydraulic | Hydraulic filter clogged | Dirty filter | Replace filter |
| E039 | Steering | Power steering pressure low | Low hydraulic fluid | Refill hydraulic oil |
| E040 | Steering | Steering sensor fault | Sensor malfunction | Replace sensor |
| E041 | Brake | Brake switch fault | Faulty brake switch | Replace switch |
| E042 | Brake | Parking brake sensor fault | Sensor issue | Inspect parking brake switch |
| E043 | Clutch | Clutch position sensor fault | Sensor failure | Replace sensor |
| E044 | Clutch | Clutch calibration required | ECU calibration lost | Perform clutch calibration |
| E045 | Electrical | Glow plug circuit fault | Failed glow plug | Test and replace glow plugs |
| E046 | Electrical | Glow plug relay fault | Relay failure | Replace relay |
| E047 | Fuel | Injector cylinder 1 fault | Faulty injector | Test injector |
| E048 | Fuel | Injector cylinder 2 fault | Injector issue | Replace injector |
| E049 | Fuel | Injector cylinder 3 fault | Injector malfunction | Inspect injector |
| E050 | Fuel | Injector cylinder 4 fault | Failed injector | Replace injector |
| E051 | Fuel | Common rail pressure sensor fault | Sensor failure | Replace sensor |
| E052 | Fuel | Rail pressure too low | Pump or injector leak | Inspect fuel system |
| E053 | Fuel | Rail pressure too high | Pressure regulator issue | Replace regulator |
| E054 | Sensor | Accelerator pedal position sensor fault | Sensor wear | Replace sensor |
| E055 | Sensor | Throttle position sensor fault | Faulty TPS | Test TPS |
| E056 | Sensor | Vehicle speed sensor fault | Damaged sensor | Replace speed sensor |
| E057 | Cooling | Fan control fault | Failed fan motor | Inspect cooling fan |
| E058 | Cooling | Cooling fan relay fault | Relay issue | Replace relay |
| E059 | Electrical | CAN bus communication error | Wiring problem | Inspect CAN wiring |
| E060 | Electrical | Ground circuit fault | Loose ground | Tighten and clean ground connections |
Note: The exact error codes displayed vary by Solis tractor model and engine manufacturer (Mitsubishi, Sonalika CRDi, Yanmar, etc.). Always refer to your tractor’s service manual for model-specific diagnostics.
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Warning Lights on a Solis Tractor
Besides diagnostic codes, your dashboard may display warning lights.
| Warning Light | Meaning | Action |
|---|---|---|
| Engine Light | Engine management fault | Read diagnostic codes |
| Oil Pressure | Low engine oil pressure | Stop engine immediately |
| Battery | Charging system issue | Check alternator |
| Coolant Temperature | Engine overheating | Shut down and allow cooling |
| PTO | PTO malfunction | Inspect PTO engagement |
| Hydraulic | Hydraulic pressure issue | Check hydraulic fluid |
| Glow Plug | Diesel preheat | Wait before starting |
| Fuel Filter | Water in fuel | Drain separator |
| DPF | Filter regeneration required | Complete regeneration |
| DEF | Low DEF fluid | Refill DEF |
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How to Reset Solis Tractor Error Codes
Some fault codes clear automatically after the issue is corrected, while others require a diagnostic reset.
General reset procedure:
- Turn the ignition off.
- Repair the underlying fault.
- Disconnect the battery for several minutes if recommended in the service manual.
- Restart the tractor.
- If the code remains, use a compatible diagnostic scanner or have the tractor serviced by a Solis dealer.
Never clear an active fault code without fixing the root cause, as the issue will typically reappear.
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Common Causes of Solis Tractor Error Codes
Most Solis tractor fault codes are caused by routine maintenance issues rather than major component failures. Common causes include:
- Dirty air filters
- Clogged fuel filters
- Low engine oil
- Low hydraulic oil
- Dirty radiator
- Weak battery
- Loose electrical connectors
- Faulty sensors
- Water-contaminated diesel fuel
- Missed maintenance intervals
Regular servicing greatly reduces the likelihood of recurring diagnostic codes.
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Final Thoughts
Solis tractor error codes are designed to help operators quickly identify engine, hydraulic, transmission, and electrical problems before they become serious failures. While many issues can be resolved with routine maintenance such as replacing filters, checking fluid levels, or cleaning electrical connections, persistent or ECU-related fault codes should be diagnosed using the proper service tools. Keeping up with scheduled maintenance and responding promptly to warning codes will help maximize your tractor’s reliability and service life.
