Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Hyundai Tucson GL, Automatic TransFACTORY OEM SERVICE PROCEDURE
4WD Control DTCS
4WD CONTROL DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC P0602 | Control Module Programming Error |
| DTC P0605 | Internal Control Module Read Only Memory (ROM) Error |
| DTC P0727 | Engine Speed Input Circuit No Signal |
| DTC P1755 | EMC Over Current |
| DTC P1756 | EMC Internal Error |
| DTC P1757 | EMC PWM Out Of Range |
| DTC P1779 | Supply Voltage Missing |
| DTC P1780 | Battery Voltage High |
| DTC P1781 | Battery Voltage Low |
| DTC P1782 | Ignition Voltage Fault |
| DTC P1820 | Pump For 4WD Motor High Overcurrent Detected |
| DTC P1821 | Pump For 4WD Motor Wire Short To Battery |
| DTC P1822 | Pump For 4WD Motor Wire Open Load |
| DTC P1823 | Pump For 4WD Motor Wire Short To GND |
| DTC P1824 | Pump For 4WD Slow Thermal Overload |
| DTC P1825 | Pressure Sensor For 4WD Supply Short To Battery |
| DTC P1826 | Pressure Sensor For 4WD Supply Short To Ground |
| DTC P1827 | Pressure Sensor For 4WD Signal Wire Short To Battery |
| DTC P1828 | Pressure Sensor For 4WD Signal Wire Short To Ground |
| DTC P1829 | Clutch Torque Tolerance Upper Limit |
| DTC P1830 | Clutch Torque Tolerance Lower Limit |
| DTC P1831 | Clutch Thermal Overstress Warning |
| DTC P1832 | Clutch Thermal Overstress Shutdown |
| DTC P1833 | Thermal Overstress Warning |
| DTC P1834 | Actuator Thermal Overstress Shutdown |
| DTC P1836 | Bleed Pressure Line Test Error |
| DTC P1837 | Vehicle Variant Can Not Be Detected |
| DTC U0001 | CAN Communication Malfunction |
| DTC U0100 | Accelerator Pedal Position Signal Error |
| DTC U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module |
| DTC U0122 | Lost Communication With Vehicle Dynamics Control Module |
| DTC U1121 | Lost Communication With Electric Stability Program Module |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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