Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks too much air is going into the engine. It's like when you try to blow up a balloon and let in too much air at once.
The engine control module (ECM) detects that the amount of air flowing through the throttle body is higher than expected.
P2173 indicates that the throttle actuator control system has detected an air flow rate that exceeds the expected limits. This could be due to a malfunctioning throttle body, a vacuum leak, or issues with the mass air flow sensor.
• Check engine light on
• Poor engine performance
• Rough idling
• Faulty throttle body
• Vacuum leak
• Defective mass air flow sensor
Throttle Body: A component that controls the amount of air entering the engine.
Mass Air Flow Sensor: A sensor that measures the amount of air entering the engine.
• Check for vacuum leaks in the intake system.
• Inspect the throttle body for proper operation.
• Test the mass air flow sensor for faults.
• Repair any vacuum leaks found.
• Clean or replace the throttle body if necessary.
• Replace the mass air flow sensor if it is faulty.
• OBD-II scanner
• Vacuum gauge
• Multimeter
$100 - $500
Moderate
• Dodge Charger
• Chrysler 300
• Jeep Grand Cherokee
• Regularly clean the throttle body.
• Inspect and replace air filters as needed.
• Check for and repair vacuum leaks promptly.
Engine Performance
• Avoid driving aggressively until the issue is resolved.
• Get the vehicle inspected by a professional mechanic.
Repairs may be covered under the vehicle's powertrain warranty if applicable.
This code has been associated with throttle body and air intake issues in various vehicle models.
Moderate – Addressing this issue promptly can prevent further engine performance problems.
Driving with a malfunctioning throttle system can lead to unsafe driving conditions.
• Engine at operating temperature
• Vehicle in park or neutral
The throttle body is located between the air filter and the intake manifold.
Q: Can I drive with a P2173 code?
A: It's not recommended to drive for long periods with this code as it can affect engine performance.
Q: What happens if I ignore a P2173 code?
A: Ignoring this code can lead to poor fuel economy and potential damage to the engine.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.