Description:

This fault code is registered when the air throttle actuator fails to calibrate correctly, potentially due to issues within the actuator mechanism, incorrect calibration procedures, or faulty control software. Proper calibration is essential for accurate throttle control, which directly influences engine performance and emissions.

Reaction:

The ECU may restrict engine performance or revert to a default throttle setting to prevent erratic engine behavior due to improper actuator calibration.

Recommendations:

• Verify Actuator Functionality: Ensure the actuator is mechanically capable of achieving full range of motion.
• Perform Calibration Procedure: Utilize specific diagnostic tools to recalibrate the actuator according to the manufacturer’s guidelines.
• Inspect for Mechanical Obstructions: Check for any physical obstructions or wear that might prevent proper actuator movement.
• Reset ECU and Test System: After successful calibration, reset the ECU to clear the fault and conduct tests to ensure the actuator operates smoothly across all engine conditions.
• Consult Technical Manual: If calibration issues persist, refer to the relevant CTM for detailed troubleshooting steps.

Note:

Regular calibration of the air throttle actuator is crucial for maintaining optimal engine control and preventing issues related to air intake and emissions.