Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car has a special flap in the front that helps control air going into the engine. This flap is stuck and can't move like it should.
The active grille air shutter system helps control airflow to the engine for better efficiency and temperature control. Code P2C73 indicates that the shutter is stuck in the open position.
The Active Grille Air Shutter is a system designed to optimize aerodynamics and engine temperature by controlling airflow through the grille. The P2C73 code signals that Shutter C is stuck in the open position, possibly due to a mechanical failure, electrical issue, or obstruction.
• Check Engine Light is on
• Reduced fuel efficiency
• Possible overheating in extreme conditions
• Mechanical obstruction or debris
• Faulty shutter motor
• Electrical wiring issue
Grille: The front part of a vehicle that allows air to enter.
Shutter: A device that opens and closes to control airflow.
• Visually inspect the grille shutter for obstructions.
• Check the electrical connections to the shutter motor.
• Use a scan tool to test the shutter motor operation.
• Remove any obstructions from the grille shutter.
• Repair or replace damaged wiring.
• Replace the shutter motor if faulty.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram 1500
• Regularly clean the grille area to prevent debris buildup.
• Perform routine vehicle inspections.
• Ensure proper maintenance of electrical systems.
Sensor Issue
• Avoid driving in extreme temperatures until fixed.
• Monitor fuel efficiency for changes.
• Have the vehicle inspected by a professional.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has become more common as vehicles have adopted active grille shutters for improved aerodynamics and fuel efficiency.
Moderate – While not immediately critical, it can affect fuel efficiency and engine cooling.
Ignoring this issue may lead to reduced vehicle performance and potential emissions violations.
• Vehicle at operating temperature
• Engine running and vehicle stationary
The active grille air shutter is located at the front of the vehicle, behind the grille.
Q: Can I drive with a P2C73 code?
A: Yes, but it's best to get it fixed soon to avoid potential efficiency and cooling issues.
Q: How does the grille shutter affect my car?
A: It helps control airflow for better fuel efficiency and engine temperature management.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.