P0073 Mitsubishi Code - Ambient Air Temperature Sensor Circuit High
Quick Answer
The P0073 diagnostic trouble code (DTC) for Mitsubishi vehicles indicates an issue with the Ambient Air Temperature (AAT) sensor circuit being too high. Common causes include Faulty Ambient Air Temperature Sensor: The sensor itself may be malfunctioning, providing incorrect readings to the ECM, Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors associated with the AAT sensor circuit can cause high voltage signals, ECM Malfunction: Issues with the engine control module can also lead to incorrect readings from the AAT sensor circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0073 Mitsubishi indicates Ambient Air Temperature Sensor Circuit High.
- Common causes
- Common causes include Faulty Ambient Air Temperature Sensor: The sensor itself may be malfunctioning, providing incorrect readings to the ECM, Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors associated with the AAT sensor circuit can cause high voltage signals, ECM Malfunction: Issues with the engine control module can also lead to incorrect readings from the AAT sensor circuit.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0073 Mitsubishi Description
The P0073 diagnostic trouble code (DTC) for Mitsubishi vehicles indicates an issue with the Ambient Air Temperature (AAT) sensor circuit being too high. The AAT sensor is responsible for measuring the temperature of the air outside the vehicle and sending this information to the engine control module (ECM). This data is used by the ECM to adjust fuel delivery and ignition timing for optimal performance and efficiency. When the AAT sensor circuit reports a high voltage signal, the ECM interprets this as a temperature reading that is abnormally high.
Common Causes of P0073 Mitsubishi
- Faulty Ambient Air Temperature Sensor: The sensor itself may be malfunctioning, providing incorrect readings to the ECM.
- Damaged Wiring or Connectors: Corrosion, fraying, or damage to the wiring or connectors associated with the AAT sensor circuit can cause high voltage signals.
- ECM Malfunction: Issues with the engine control module can also lead to incorrect readings from the AAT sensor circuit.
- Environmental Factors: Extreme temperatures or exposure to moisture can also impact the AAT sensor's performance.
Symptoms of P0073 Mitsubishi
- Check Engine Light: The most common symptom associated with this code is the illumination of the Check Engine Light on the vehicle's dashboard.
- Inaccurate Outside Temperature Display: The vehicle's temperature display may show an incorrect or fluctuating outside temperature.
- Reduced Fuel Efficiency: The ECM may adjust fuel delivery based on the incorrect temperature reading, leading to decreased fuel efficiency.
- Engine Performance Issues: The engine may run rough, hesitate, or lack power due to incorrect adjustments made by the ECM.
How to Fix P0073 Mitsubishi
- Diagnose the Issue: Use an OBD-II scanner to retrieve the specific DTC and verify the AAT sensor circuit high voltage condition.
- Inspect Wiring and Connectors: Check the wiring and connectors for any damage, corrosion, or loose connections. Repair or replace as needed.
- Test AAT Sensor: Test the AAT sensor's resistance and voltage output to determine if it is functioning correctly. Replace if necessary.
- Clear Codes: After making the necessary repairs, clear the DTC from the ECM's memory and recheck for any recurring issues.
- Test Drive: Take the vehicle for a test drive to ensure the AAT sensor is providing accurate readings and that the engine is operating correctly.
Cost to Fix P0073 Mitsubishi
The cost of repairing a P0073 code for a Mitsubishi vehicle can vary depending on the specific cause of the issue and the labor rates in your area. In general, the cost of parts for an AAT sensor replacement can range from $50 to $100, while labor costs can range from $100 to $200. Additional costs may be incurred if wiring or connectors need to be replaced. It's important to consult with a qualified mechanic to get an accurate estimate for your specific vehicle. Labor rates at auto repair shops can vary between $80 and $150 per hour, so it's recommended to check local rates for a more precise estimate.
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Frequently Asked Questions about P0073 Mitsubishi Code
1. What does the OBDII code P0073 mean on a Mitsubishi?
P0073 indicates an issue with the Ambient Air Temperature Sensor Circuit, specifically that the voltage is higher than expected.
2. What are the common symptoms of a P0073 code?
Symptoms may include incorrect ambient temperature readings, failure of the air conditioning system to work properly, and the Check Engine Light being illuminated.
3. What causes a P0073 code on a Mitsubishi?
Common causes include a faulty ambient air temperature sensor, damaged or corroded wiring, poor electrical connections, or issues with the vehicle's PCM.
4. Can I drive my Mitsubishi with a P0073 code?
While the vehicle may still be drivable, it’s recommended to address the issue promptly as it can affect climate control and engine performance.
5. How do you fix a P0073 code on a Mitsubishi?
Repairs may involve replacing the ambient air temperature sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or resetting the PCM.
6. Where is the ambient air temperature sensor located on a Mitsubishi?
The ambient air temperature sensor is typically located near the front of the vehicle, often behind the grille or near the radiator.
7. How much does it cost to fix a P0073 code?
Repair costs can vary but generally range from $50 to $150 for sensor replacement, plus additional labor costs if wiring repairs are needed.
8. Can a faulty ambient air temperature sensor affect fuel efficiency?
Yes, inaccurate temperature readings can impact engine performance and climate control, potentially leading to reduced fuel efficiency.
9. How do you test an ambient air temperature sensor for a P0073 code?
You can test the sensor using a multimeter to check for proper resistance values based on the ambient temperature.
10. Will clearing the P0073 code fix the problem permanently?
Clearing the code will reset the Check Engine Light, but the underlying issue must be resolved to prevent the code from returning.
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