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.
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HOMESERVICE MANUALSHYUNDAI2014SONATA HYBRID BASEREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXCONTROL SYSTEM DTCS - HEV
2014 Hyundai Sonata Hybrid Base
Control System DTCS - HEV
2014 Hyundai Sonata Hybrid BaseSECTION Control System DTCS - HEV
CONTROL SYSTEM COMMUNICATION - HEV - DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC P0504 | Brake Switch 'A' 'B' Correlation |
| DTC P0841 | Transmission Fluid Pressure Sensor Switch A Circuit Range Performance |
| DTC P0842 | Transmission Fluid Pressure Sensor Switch 'A' Circuit Low |
| DTC P0843 | Transmission Fluid Pressure Sensor Switch 'A' Circuit High |
| DTC P0A0F | Engine Failed To Start |
| DTC P1610 | Non-Immobilizer-EMS Connected to an Immobilizer |
| DTC P1679 | Immobilizer-EMS Data Fail (Data frame, CS, Message error) |
| DTC P1696 | Immobilizer-Authentication Fail |
| DTC P1744 | Transmission Engine Clutch System Performance |
| DTC P1A77 | Check Generator Belt |
| DTC P1A86 | Inappropriate And Low SOC |
| DTC U0001 | High Speed CAN Communication Bus (C-CAN) |
| DTC U0100 | Lost Communication With ECM PCM 'A' (C-CAN) |
| DTC U0101 | Lost Communication with TCM (C-CAN) |
| DTC U0110 | Lost Communication With Drive Motor Control Module (C-CAN) |
| DTC U0111 | Lost Communication With Battery Energy Control Module 'A' (C-CAN) |
| DTC U0122 | Lost Communication With Vehicle Dynamics Control Module |
| DTC U0129 | Lost Communication With Brake System Control Module |
| DTC U0155 | Lost Communication With Instrument Panel Cluster (IPC) Control Module |
| DTC U0164 | Lost Communication with HVAC Control Module |
| DTC U0298 | Lost Communication with DC to DC Converter Control Module |
| DTC U1001 | High Speed CAN Communication Bus (H-CAN) |
| DTC U1002 | Lost Communication with ECM (H-CAN) |
| DTC U1003 | Lost Communication with TCM (H-CAN) |
| DTC U1005 | Lost Communication with Drive Motor Control Module (H-CAN) |
| DTC U1006 | Lost Communication with Battery Energy Control Module 'A' (H-CAN) |
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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.