P1233 - FAULT CODE - OBD2

P1233 INFINITI, NISSAN: ELECTRIC THROTTLE CONTROL PERFORMANCE BANK 2

The Electric Throttle Control (ETC) is an electrical system used in automobiles, whose function is to electronically connect the accelerator pedal to the accelerator. This system replaces the mechanical coupling used in many applications.

Generally, an ETC system consists of an Accelerator Pedal Module (equipped with two or more independent sensors), a throttle valve that is opened and closed by an electric motor, often referred to as an electric throttle body, and the ECM (Engine Control Module). The ECM through software can determine the required throttle position, using calculations from the data measured by the sensors. The electric motor, on the other hand, is used to open the throttle valve to the desired angle through a closed-loop control algorithm within the ECM.

When the DTC P1233 OBDII code is set on Nissan and Infiniti vehicles, it is due to the electric throttle control function not working properly.

• Check Engine lamp illuminates.
• Limited throttle response.

The reasons for the P1233 OBD2 fault code being stored are:

• The Electric Throttle Control actuator harness may have been damaged.
• The Electric Throttle Control actuator circuit could be shorted or opened.
• The ETC actuator could be faulty.

The steps to follow to correct the P1233 OBDII diagnostic code are:

• Consult the Technical Service Bulletins.
• Use a scanner to obtain all the DTCs stored in the ECM If you get codes that refer to electronic throttle system problems, perform the respective diagnosis of these.
• Check the cables related to the ETC actuator and verify that they do not present common deficiencies due to corrosion or wear. If such conditions are discovered, make the appropriate repairs or changes.
• Measure the voltages of the Electric Throttle Control actuator circuit and check this circuit for shorts. If you discover deficiencies that cause such a condition, make the appropriate corrections.
• Verify the integrity of the ETC actuator, taking into consideration the manufacturer's recommended diagnostic steps. If you determine that the actuator is damaged, consider replacing it.