P1111 NISSAN Possible Causes
- Faulty intake valve timing control solenoid valve, bank 1
- Intake valve timing control solenoid valve harness for bank 1 is open or shorted
- Poor electrical connection in the intake valve timing control solenoid valve circuit, bank 1
How to Fix P1111 NISSAN 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 valve 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/lack of power
Possible rough engine idle
P1111 NISSAN Meaning
The intake valve timing control solenoid valve is activated by on/off pulse signals (duty ratio) from the engine control module (ECM). The intake valve timing control solenoid valve changes the amount of oil and direction of flow through the intake valve timing control unit or stops the oil flow.
Longer pulse width advances the valve angle. Shorter pulse width retards the valve angle.
When the ON and OFF pulse widths become equal, the solenoid valve stops the oil pressure flow to lock the intake valve angle at the control position.
The diagnostic trouble code (DTC) is set when incorrect voltage is sent to the ECM through the intake valve timing control solenoid valve.