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 Equus SignatureFACTORY OEM SERVICE PROCEDURE
Electronic Stability Control (ESC) System DTCS
DIAGNOSTIC TROUBLE CODES DESCRIPTIONS
| DTC | Description |
|---|---|
| DTC C1101 | Battery Voltage High |
| DTC C1102 | Battery Voltage Low |
| DTC C1200 | Wheel Speed Sensor Front-LH Open Short |
| DTC C1201 | Wheel Speed Sensor Front-LH Range Performance Intermittent |
| DTC C1202 | Wheel Speed Sensor Front-LH Invalid no Signal |
| DTC C1203 | Wheel Speed Sensor Front-RH Open Short |
| DTC C1204 | Wheel Speed Sensor Front-RH Range Performance Intermittent |
| DTC C1205 | Wheel Speed Sensor Front-RH Invalid no Signal |
| DTC C1206 | Wheel Speed Sensor Rear-LH Open Short |
| DTC C1207 | Wheel Speed Sensor Rear-LH Range Performance Intermittent |
| DTC C1208 | Wheel Speed Sensor Rear-LH Invalid no Signal |
| DTC C1209 | Wheel Speed Sensor Rear-RH Open Short |
| DTC C1210 | Wheel Speed Sensor Rear-RH Range Performance Intermittent |
| DTC C1211 | Wheel Speed Sensor Rear-RH Invalid no Signal |
| DTC C1235 | Primary Pressure Sensor-Electrical |
| DTC C1237 | Primary Pressure Sensor-Signal |
| DTC C1260 | Steering Angle Sensor Circuit-Signal |
| DTC C1261 | Steering Angle Sensor Not Calibrated |
| DTC C1274 | Longitudinal G Sensor-Electrical |
| DTC C1275 | Longitudinal G Sensor Range Performance error |
| DTC C1282 | Yaw Rate & Lateral G Sensor-Electrical |
| DTC C1283 | Yaw Rate & Lateral G Sensor-Signal |
| DTC C1353 | Pressure sensor_Wh1_electrical |
| DTC C1354 | Pressure sensor_Wh1_other |
| DTC C1355 | Pressure sensor_Wh2_electrical |
| DTC C1356 | Pressure sensor_Wh2_other |
| DTC C1357 | SCC or DBF deceleration plausibility error |
| DTC C1358 | AVH not Available due to EPB in Emergency Release |
| DTC C1359 | SCC Control Unit Error |
| DTC C1503 | TCS ESC (ESP) Switch error |
| DTC C1513 | Brake switch error |
| DTC C1604 | ECU Hardware Error |
| DTC C1605 | CAN Hardware error |
| DTC C1611 | CAN Time-out ECM |
| DTC C1612 | CAN Time-out TCM |
| DTC C1613 | CAN signal error ECM (Check ECM) |
| DTC C1616 | CAN Communication Bus Off |
| DTC C1623 | CAN Time-out Steering Angle Sensor |
| DTC C1626 | Implausible Control |
| DTC C1638 | CAN time-out SCC |
| DTC C1648 | CAN signal error ECM for SCC (Check ECM) |
| DTC C1649 | CAN time-out ECM for SCC |
| DTC C1650 | CAN signal error SCC |
| DTC C1651 | CAN time-out EPB |
| DTC C1652 | CAN signal error EPB |
| DTC C1653 | CAN time-out Cluster for SCC |
| DTC C1654 | CAN time-out Cluster for EPB |
| DTC C1655 | CAN signal error TCM for AVH (Check TCM) |
| DTC C1664 | CAN signal error SCC for VSM |
| DTC C1702 | Variant Coding Error |
| DTC C2112 | Valve Relay Error |
| DTC C2227 | Excessive Temperature Of Brake Disc |
| DTC C2228 | CAN signal error TCM for SCC |
| DTC C2308 | Front-LH Valve error (Inlet Valve) |
| DTC C2312 | Front-LH Valve error (Outlet Valve) |
| DTC C2316 | Front-RH Valve error (Inlet Valve) |
| DTC C2320 | Front-RH Valve error (Outlet Valve) |
| DTC C2324 | Rear-LH Valve error (Inlet Valve) |
| DTC C2328 | Rear-LH Valve error (Outlet Valve) |
| DTC C2332 | Rear-RH Valve error (Inlet Valve) |
| DTC C2336 | Rear-RH Valve error (Outlet Valve) |
| DTC C2366 | TC Valve Primary (USV1) Error |
| DTC C2370 | TC Valve Secondary (USV2) Error |
| DTC C2372 | Electronic Shuttle Valve Primary (HSV1) Error |
| DTC C2374 | Electronic Shuttle Valve Secondary (HSV2) Error |
| DTC C2380 | ABS TCS ESP valve error |
| DTC C2402 | Motor Failure |
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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