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.
2011 Hyundai Equus SignatureFACTORY OEM SERVICE PROCEDURE
DTC Index
DTC INDEX
| DTC | Description |
|---|---|
| DTC P0219 | Engine Overspeed Condition |
| DTC P0221 | Throttle Position Sensor 2 Signal Circuit Range/Performance |
| DTC P0222 | Throttle Position Sensor 2 Signal Circuit Low Input |
| DTC P0223 | Throttle Position Sensor 2 Signal Circuit High Input |
| DTC P0230 | Fuel Pump Primary Circuit |
| DTC P0261 | Cylinder 1 Injector Circuit Low |
| DTC P0262 | Cylinder 1 Injector Circuit High |
| DTC P0264 | Cylinder 2 Injector Circuit Low |
| DTC P0265 | Cylinder 2 Injector Circuit High |
| DTC P0267 | Cylinder 3 Injector Circuit Low |
| DTC P0268 | Cylinder 3 Injector Circuit High |
| DTC P0270 | Cylinder 4 Injector Circuit Low |
| DTC P0271 | Cylinder 4 Injector Circuit High |
| DTC P0273 | Cylinder 5 Injector Circuit Low |
| DTC P0274 | Cylinder 5 Injector Circuit High |
| DTC P0276 | Cylinder 6 Injector Circuit Low |
| DTC P0277 | Cylinder 6 Injector Circuit High |
| DTC P0279 | Cylinder 7 Injector Circuit Low |
| DTC P0280 | Cylinder 7 Injector Circuit High |
| DTC P0282 | Cylinder 8 Injector Circuit Low |
| DTC P0283 | Cylinder 8 Injector Circuit High |
| DTC P0300 | Random/Multiple Cylinder Misfire Detected |
| DTC P0301 | Cylinder 1-Misfire detected |
| DTC P0302 | Cylinder 2-Misfire detected |
| DTC P0303 | Cylinder 3-Misfire detected |
| DTC P0304 | Cylinder 4-Misfire detected |
| DTC P0305 | Cylinder 5-Misfire detected |
| DTC P0306 | Cylinder 6-Misfire detected |
| DTC P0307 | Cylinder 7 Misfire Detected |
| DTC P0308 | Cylinder 8 Misfire Detected |
| DTC P0327 | Knock Sensor 1 Circuit Low (Bank 1) |
| DTC P0328 | Knock Sensor 1 Circuit High (Bank 1) |
| DTC P032C | Knock Sensor 3 Circuit Low (Bank 1) |
| DTC P032D | Knock Sensor 3 Circuit High (Bank 1) |
| DTC P0332 | Knock Sensor 2 Circuit Low (Bank 2) |
| DTC P0333 | Knock Sensor 2 Circuit High (Bank 2) |
| DTC P0335 | Crankshaft Position Sensor 'A' Circuit |
| DTC P0336 | Crankshaft Position Sensor 'A' Circuit Range/Performance |
| DTC P033C | Knock Sensor 4 Circuit Low (Bank 2) |
| DTC P033D | Knock Sensor 4 Circuit High (Bank 2) |
| DTC P0340 | Camshaft Position Sensor 'A' Circuit (Single Sensor) |
| DTC P0341 | Camshaft Position Sensor A Circuit Range/Performance (Bank 1) |
| DTC P0345 | Camshaft Position Sensor 'A' Circuit (Bank 2) |
| DTC P0346 | Camshaft Position Sensor A Circuit Range/Performance (Bank 2) |
| DTC P0365 | Camshaft Position Sensor B Circuit Malfunction (Bank 1) |
| DTC P0366 | Camshaft Position Sensor 'B' Circuit Range/Performance (Bank 1) |
| DTC P0390 | Camshaft Position Sensor 'B' Circuit (Bank 2) |
| DTC P0391 | Camshaft Position Sensor 'B' Circuit Range/Performance (Bank 2) |
| DTC P0420 | Catalyst System Efficiency below Threshold (Bank 1) |
| DTC P0430 | Catalyst System Efficiency Below Threshold (Bank 2) |
| DTC P0442 | Evaporative Emission System-Leak detected (small leak) |
| DTC P0444 | Evaporative Emission System-Purge Control Valve Circuit Open |
| DTC P0447 | Evaporative Emission System - Vent Control Circuit Open |
| DTC P0448 | Evaporative Emission System - Vent Control Circuit Shorted |
| DTC P0449 | Evaporative Emission System-Vent Valve/Solenoid Circuit |
| DTC P0450 | Evaporative Emission System Pressure Sensor/Switch |
| DTC P0451 | Evaporative Emission System-Pressure Sensor Range/Performance |
| DTC P0452 | Evaporative Emission System-Pressure Sensor Low Input |
| DTC P0453 | Evaporative Emission System-Pressure Sensor High Input |
| DTC P0455 | Evaporative Emission System-Leak detected (Large leak) |
| DTC P0456 | Evaporative Emission System-Leak detected (very small leak) |
| DTC P0457 | Evaporative Emission System-Leak detected (tank cap loose/off) |
| DTC P0458 | Evaporative Emission System Purge Control Valve Circuit Low |
| DTC P0459 | Evaporative Emission System Purge Control Valve Circuit High |
Factory Service Tools
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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.