P1105 — Fuel Pressure Regulator / Solenoid Control
CAUTIONIs it safe to drive? Drive gently and get it looked at soon — it can worsen or fail inspection.
What P1105 means
This is a manufacturer-specific code — its meaning depends on the vehicle’s make (see below).
What P1105 means on specific makes
Mitsubishi CAUTION
Fault in the fuel pressure regulator control solenoid circuit (the duty-cycle solenoid that manages fuel-rail pressure on certain Mitsubishi systems). Can cause rich/lean and driveability issues. Note: some refs tie P1105 to a barometric/MAP-related solenoid — confirm by model.
- Failed fuel pressure regulator solenoid ($60-200)
- Connector/wiring fault
- Vacuum reference leak
Check first: Test the solenoid and its vacuum reference; watch fuel pressure and trims. Verify the exact function against the model's service info.
Source: troublecodes.net/mitsu, ricksfreeautorepairadvice.com/mitsubishi-obd2-codes