P1111 INFINITI Possible Causes
- Faulty intake valve timing control solenoid valve, bank 1
- Bank 1 intake valve timing control solenoid harness is open or shorted
- Poor electrical connection in bank 1 intake valve timing control solenoid circuit
How to Fix P1111 INFINITI Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
What Does It Mean?
Since the intake valve timing control solenoid uses oil flow to control timing, dirty oil can cause the valve to stick open or closed. Before replacing the valve, change the engine oil and filter and reset the engine code. If the code returns, you can remove the intake valve timing control solenoid and clean it with brake cleaner.
Possible Symptoms
Engine light on (or service engine soon warning light)
Possible engine power loss
Possible rough engine idle
P1111 INFINITI Meaning
The intake valve timing control solenoid is activated by pulse on/off signals (duty ratio) from the engine control module (ECM). The intake valve timing control solenoid changes the amount of oil and direction of flow through the intake valve timing control unit or stops oil flow.
Longer pulse width advances the valve angle. Shorter pulse width retards the valve angle.
When ON and OFF pulse widths become equal, the solenoid stops oil pressure flow to lock the intake valve angle at the control position.
Diagnostic trouble code (DTC) is set when incorrect voltage is sent to ECM through the intake valve timing control solenoid.