P1110 INFINITI Possible Causes
- Faulty intake valve timing control solenoid valve
- Intake valve timing control solenoid valve harness is open or shorted
- Intake valve timing control solenoid valve may be faulty
- Crankshaft position sensor (POS) may be faulty
- Camshaft position sensor
How to Fix P1110 INFINITI Code?
Start by checking the “possible causes” listed above. Visually inspect the related 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.
When Is the Code Detected?
When there is a discrepancy between the target angle and the phase control angle degree, the valve will stop functioning and the Engine Control Module (ECM) will trigger the P1110 code.
Possible Symptoms
Check Engine Light illuminated (or Service Engine Soon warning light)
Possible engine misfire/loss of power
Possible rough engine idle
P1110 INFINITI Meaning
This mechanism hydraulically controls the cam phases continuously with the fixed operating angle of the intake valve.
The Engine Control Module (ECM) receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant temperature. Then the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid valve according to driving conditions. This controls the intake valve closing/opening timing to increase engine torque in the low/mid speed range and output in the high speed range.
The intake valve timing control solenoid valve changes the oil amount and flow direction 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 ON and OFF pulse widths become equal, the solenoid valve stops the oil pressure flow to fix the intake valve angle at the control position.