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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSHYUNDAI2011EQUUS SIGNATUREREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM DIAGNOSIS (3 OF 3)
2011 Hyundai Equus Signature
Engine Control System Diagnosis (3 Of 3)
2011 Hyundai Equus SignatureSECTION Engine Control System Diagnosis (3 Of 3)
- Diagnostic Trouble Code Index
- DTC P0461: Fuel Level Sensor 'A' Circuit Range/Performance
- DTC P0462: Fuel Level Sensor 'A' Circuit Low Input
- DTC P0463: Fuel Level Sensor 'A' Circuit High Input
- DTC P0496: Evaporative Emission System High Purge Flow
- DTC P0497: Evaporative Emission System Low Purge Flow
- DTC P0501: Vehicle Speed Sensor 'A' Range/Performance
- DTC P0502: Vehicle Speed Sensor 'A' Circuit Low Input
- DTC P0503: Vehicle Speed Sensor A Intermittent/Erratic/High
- DTC P0504: Brake Switch 'A' 'B' Correlation
- DTC P0506: Idle Air Control System-RPM Lower than Expected
- DTC P0507: Idle Air Control System-RPM Higher than Expected
- DTC P0532: A/C Refrigerant Pressure Sensor 'A' Circuit Low Input
- DTC P0533: A/C Refrigerant Pressure Sensor 'A' Circuit High Input
- DTC P0562: System Voltage Low
- DTC P0563: System Voltage High
- DTC P0564: Cruise Control Multi-Function Input A Circuit
- DTC P0605: Internal Control Module Read Only Memory (ROM) Error
- DTC P0606: ECM/PCM Processor
- DTC P061B: Internal Control Module Torque Calculation Performance
- DTC P0625: Generator Field/F Terminal Circuit Low
- DTC P0626: Generator Field/F Terminal Circuit High
- DTC P0630: VIN Not Programmed or Incompatible-ECM/PCM
- DTC P0638: Throttle Actuator Control Range/Performance (Bank 1)
- DTC P0642: Sensor Reference Voltage 'A' Circuit Low
- DTC P0645: A/C Clutch Relay Control Circuit
- DTC P0646: A/C Clutch Relay Control Circuit Low
- DTC P0647: A/C Clutch Relay Control Circuit High
- DTC P0650: Malfunction Indicator Lamp (MIL) Control Circuit
- DTC P0652: Sensor Reference Voltage 'B' Circuit Low
- DTC P0660: Intake Manifold Tuning Valve Control Circuit/Open (Bank 1)
- DTC P0661: Intake Manifold Tuning Valve Control Circuit Low (Bank 1)
- DTC P0662: Intake Manifold Tuning Valve Control Circuit High (Bank 1)
- DTC P0698: Sensor Reference Voltage 'C' Circuit Low
- DTC P0704: Clutch Switch Input Circuit Malfunction
- DTC P2066: Fuel Level Sensor 'B' Performance
- DTC P2067: Fuel Level Sensor 'B' Circuit Low
- DTC P2068: Fuel Level Sensor 'B' Circuit High
- DTC P2096: Post Catalyst Fuel Trim System too Lean (Bank 1)
- DTC P2097: Post Catalyst Fuel Trim System too Rich (Bank 1)
- DTC P2098: Post Catalyst Fuel Trim System Too Lean (Bank 2)
- DTC P2099: Post Catalyst Fuel Trim System Too Rich (Bank 2)
- DTC P2101: Throttle Actuator Control Motor Circuit Range/Performance
- DTC P2106: Limp Home Mode - Force Limited Power
- DTC P2122: Accelerator Position Sensor 1 Signal Circuit Low Input
- DTC P2123: Accelerator Position Sensor 1 Signal Circuit High Input
- DTC P2127: Accelerator Position Sensor 2 Signal Circuit Low Input
- DTC P2128: Accelerator Position Sensor 2 Signal Circuit-High Input
- DTC P2138: Accelerator Position Sensor 1 & 2 Signal Voltage Correlation
- DTC P2187: System too Lean at Idle (←Additive) (Bank 1)
- DTC P2188: System too Rich at Idle (Bank 1)
- DTC P2189: System Too Lean at Idle (←Additive) (Bank 2)
- DTC P2190: System too Rich at Idle (Bank 2)
- DTC P2191: System too Lean at Higher Load (Multiple) (Bank 1)
- DTC P2192: System too Rich at Higher Load (Bank 1)
- DTC P2193: System Too Lean at Higher Load (←Multiple) (Bank 2)
- DTC P2194: System Too Rich at Higher Load (Bank 2)
- DTC P2270: O2 Sensor Stuck Lean - Bank1 Sensor 2
- DTC P2271: O2 Sensor Stuck Rich - Bank1 Sensor 2
- DTC P2272: O2 Sensor Stuck Lean - Bank2 Sensor 2
- DTC P2273: O2 Sensor Stuck Rich - Bank2 Sensor 2
- DTC P2502: Charging System Voltage
- DTC P2610: ECM/PCM-Engine Off Timer Performance
- DTC U0001: High Speed CAN Communication Bus off
- DTC U0101: Lost Communication With TCM
- DTC U1111: Battery Sensor fault detected by ECU
- DTC U1112: LIN Communication Error
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.