Hyundai/Kia Rail Pressure Sensor Change
Supported coding features by HiCOM diagnostic tool https://www.obdtester.com/hicom
Rail Pressure Sensor Replacement
What it does
- Resets ECU adaptation for the new fuel rail pressure sensor
- Ensures accurate measurement of fuel rail pressure
- Restores correct fuel injection control
When it is required
- After replacing the rail pressure sensor
- When fuel pressure–related fault codes are present
- After high-pressure fuel system repairs
- When engine performance is affected by incorrect pressure readings
Conditions that must be met
- New sensor correctly installed and connected
- Fuel system leak-free
- No active fuel pressure or injector fault codes
- Ignition ON, engine OFF (unless instructed)
- Stable battery voltage
What happens during the procedure
- ECU clears old sensor offset and adaptation values
- Reads baseline rail pressure
- Stores new reference for:
- Injection quantity control
- Pressure regulation
- Engine load calculation
If procedure is not performed
- Incorrect fuel delivery
- Hard starting or rough running
- Increased emissions
- Fault codes may remain active
After replacement
- Verify rail pressure in live data
- Start engine and check stability
- Perform a short test drive
- Confirm no fuel pressure warnings remain