P1110 - FAULT CODE - OBD2

P1110 NISSAN: INTAKE VALVE TIMING CONTROL BANK 1

The valve timing system provides continuous hydraulic control of the cam phases. It takes into account the fixed operating angle of the intake valve. The ECM (Engine Control Module) provides signals of the camshaft position, crankshaft position, engine temperature, and speed. Then, it gives the on/off pulse service signals to the intake valve timing control solenoid required by the driving conditions. In this way, the engine torque is increased at different engine speeds by controlling the timing of the intake valve opening and closing.

The intake valve timing control solenoid adjusts the amount of oil and the direction of the synchronization unit. It can decide whether to send or stop the oil flow. The pulse width determines the valve angle. If it is longer, the width is advanced. On the other hand, if it is shorter, the angle is delayed. When the on and off pulse widths are equal, the solenoid stops the flow of oil pressure. Thus, it seeks to set the valve angle to the control position.

The diagnostic code P1110 OBDII is a manufacturer-specific code. In the case of Nissan, it indicates that the ECM detects a wrong operation in the intake valve timing solenoid for bank 1.

• Check Engine light ON.
• Loss or lack of engine power.
• Irregularities when the engine is idle.

Reasons for setting the P1110 OBD2 fault code on a Nissan vehicle :

• The valve timing control solenoid wiring harness may be shorted or open.
• The intake valve timing control solenoid may be faulty.
• The CKP (Crankshaft Position Sensor) may be damaged.
• The camshaft position sensor may be defective.

Steps to fix the DTC P1110 OBDII code on your Nissan vehicle:

• Consult the Technical Service Bulletins. These bulletins contain specific data and steps directly from the manufacturer, they are useful.
• Before performing any repairs, scan the vehicle and check for other stored fault codes. If they are related to the CKP or CMP Sensor, diagnose them first.
• Check the condition of all the wires and connectors leading to the intake valve control solenoid. If they show any inconsistencies that cause a short circuit, make the necessary repairs.
• Check the condition of the timing valve solenoid. Follow the diagnostic steps for the timing valve solenoid to verify that the electrical values match those specified. Repair or replace if necessary.