Addressing the P1D73 code in a Dodge Dart is critical for maintaining peak performance. This diagnostic trouble code refers to the operation of the active grille air shutter. How to fix the P1D73 Dodge Dart code?
You can resolve this issue by performing diagnostic scan, visual inspection, checking wiring and connectors, testing sensors, verifying mechanical operation, software calibration, and clearing codes.
We will assist you in inspecting the active grille air shutter mechanism, checking for wiring problems, and utilizing diagnostic tools. You can repair the system with confidence if you understand the complexities of this error code and follow the recommended procedures. It ensures that your vehicle runs at peak performance and efficiency.

What is the P1D73 Dodge Dart Code?
In a Dodge Dart, the P1D73 code indicates a problem with the active grille air shutter performance. The active grille air shutter is a component that regulates airflow into the engine compartment of a vehicle. By adjusting the grille openings based on driving conditions, it improves aerodynamics and fuel efficiency.
The P1D73 diagnostic trouble code is triggered when the Powertrain Control Module (PCM) detects a deviation from the expected performance of the active grille air shutter.
To increase fuel economy and aerodynamics, this system is in charge of shutting off the front grille opening when the engine is not running. The shutter’s improper operation may result in reduced performance and fuel efficiency. A dirty or obstructed shutter could be the only thing causing the issue in some situations, but it could also be a sign of a more serious electrical system problem.

4 Reasons Cause P1D73 Dodge Dart Code
When an issue with the active grille air shutter performance is identified, the Dodge Dart P1D73 code is activated. The P1D73 code can be activated by a number of things, and common causes include mechanical problems, wiring issues, sensor malfunctions, and software problems.
Mechanical Issues
Issues with the active grille air shutter’s mechanical parts, like a jammed or broken shutter mechanism.
Electrical or Wiring Problems
The P1D73 error code may indicate faulty wiring, connections, or electrical parts related to the active grille air shutter system.
Sensor Malfunction
The sensors in charge of monitoring the active grille air shutter may fail, resulting in incorrect data being sent to the PCM.
Software or Calibration Issues
Problems with the software or the PCM’s calibration can lead to inaccurate assessments of the performance of the active grille air shutter.
How to Fix the P1D73 Dodge Dart Code?
Diagnostic scanning, visual inspection, wiring and connector inspection, sensor testing, mechanical operation verification, software calibration, and code clearing are all viable solutions for this issue.
Diagnostic Scan
Let’s conduct a diagnostic scan with an OBD-II scanner to find out more about the P1D73 code. This will help with targeted troubleshooting by providing information about the nature of the fault.
Visual Inspection
Visually inspect the components of the active grille air shutter. Look for any obvious indications of obstruction, damage, or misalignment in the area. Check that there are no obstacles in the way of the shutter mechanism’s free motion.
Check Wiring and Connectors
Inspect the cables and connections connected to the active grille air shutter system. Make sure to inspect for corrosion, broken wires, and loose connections. As necessary, fix or swap out any damaged parts.
Test Sensors
In order to track its effectiveness, the active grille air shutter system uses sensors. Check the functionality of these sensors. Consider purchasing a new sensor if one is discovered to be defective.
Verify Mechanical Operation
Make sure the air shutter on the active grille opens and closes as it should. Take care of any mechanical issues that may be causing the shutter to become stuck. If necessary, lubricate moving parts or swap out malfunctioning components.
Software Calibration
Look for any software updates that are available or PCM calibration problems. Update the PCM software to the most recent version supplied by the manufacturer, if applicable.
Clear Codes
Utilizing the OBD-II scanner, clear the P1D73 code after resolving the issues found. The computer system in the car will be reset as a result. Test drive the vehicle to make sure the problem has been fixed.
Professional Assistance
If the issue continues seek expert assistance from a certified mechanic or the Dodge dealership. They possess the knowledge and resources necessary to carry out more thorough diagnostics and handle challenging problems.