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P0073 RAM Code - Ambient Air Temperature Sensor Circuit High

Quick Answer

The P0073 diagnostic trouble code (DTC) refers to an issue with the Ambient Air Temperature (AAT) sensor circuit being too high. Common causes include Faulty Ambient Air Temperature sensor, Wiring or connector issues in the AAT sensor circuit, Corrosion or damage to the sensor or wiring. 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 RAM indicates Ambient Air Temperature Sensor Circuit High.
Common causes
Common causes include Faulty Ambient Air Temperature sensor, Wiring or connector issues in the AAT sensor circuit, Corrosion or damage to the sensor or wiring.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0073 RAM Description

The P0073 diagnostic trouble code (DTC) refers to an issue with the Ambient Air Temperature (AAT) sensor circuit being too high. The AAT sensor is responsible for measuring the outside air temperature and sending this information to the Engine Control Module (ECM) to adjust various engine parameters for optimal performance. When the AAT sensor circuit reads a higher than normal voltage, it indicates a fault in the system.

OBDII Code P0073 RAM - Ambient Air Temperature Sensor Circuit High
P0073 RAM Code - Ambient Air Temperature Sensor Circuit High

Common Causes of P0073 RAM

  1. Faulty Ambient Air Temperature sensor
  2. Wiring or connector issues in the AAT sensor circuit
  3. Corrosion or damage to the sensor or wiring
  4. ECM software or hardware issues
  5. Ambient air temperature sensor circuit short to power

Symptoms of P0073 RAM

  1. Check Engine Light illuminated
  2. Inaccurate temperature readings on the vehicle's display
  3. Poor fuel efficiency
  4. Engine running rough or stalling
  5. Difficulty starting the engine in extreme temperatures

How to Fix P0073 RAM

  1. Begin by accessing the Ambient Air Temperature sensor, typically located in the front bumper or grille area.
  2. Inspect the sensor and wiring for any visible damage, corrosion, or loose connections.
  3. Test the sensor's resistance and voltage output using a multimeter to determine if it is functioning within specifications.
  4. If the sensor is faulty, replace it with a new OEM or high-quality aftermarket unit.
  5. Clear the DTC codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0073 RAM

The cost of repairing a P0073 code can vary depending on the specific cause of the issue and the labor rates in your area. Typically, the price for a new Ambient Air Temperature sensor ranges from $50 to $150, depending on the vehicle make and model. Labor costs can add an additional $80 to $150 per hour. In total, you can expect to pay between $150 and $300 for parts and labor to address the Ambient Air Temperature Sensor Circuit High issue. It's advisable to contact local auto repair shops for a more accurate estimate based on your vehicle's specifications.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0073 RAM Code

1. What are the common symptoms of OBDII code P0073 RAM (Ambient Air Temperature Sensor Circuit High)?

The common symptoms of P0073 include incorrect temperature readings on the vehicle's display, issues with the climate control system, and potential illumination of the Check Engine Light.

2. What can cause OBDII code P0073 RAM to trigger?

The code P0073 RAM is typically triggered by a faulty ambient air temperature sensor, damaged wiring or connectors related to the sensor, or issues with the sensor circuit.

3. How can I diagnose the cause of OBDII code P0073 RAM?

To diagnose the cause of P0073, you can use a multimeter to test the ambient air temperature sensor, check the wiring and connectors for any damage, and inspect the sensor circuit for any faults.

4. Is it safe to drive with OBDII code P0073 RAM active?

It is generally safe to drive with code P0073, but it is recommended to address the issue promptly to avoid any potential problems with the vehicle's climate control system or other related systems.

5. How can I repair OBDII code P0073 RAM?

To repair P0073, you may need to replace the ambient air temperature sensor, repair any damaged wiring or connectors, or reset the fault code using an OBDII scanner after addressing the underlying issue.

6. Can a faulty ambient air temperature sensor cause poor fuel efficiency?

Yes, a faulty ambient air temperature sensor can cause poor fuel efficiency as it may lead to incorrect fuel mixture calculations by the engine control unit based on inaccurate temperature readings.

7. Will resetting the fault code for P0073 RAM solve the issue?

Resetting the fault code for P0073 may temporarily turn off the Check Engine Light, but if the underlying issue such as a faulty sensor or wiring is not addressed, the code is likely to reoccur.

8. How much does it typically cost to repair OBDII code P0073 RAM?

The cost of repairing P0073 can vary depending on the cause of the issue, but it may involve expenses for a new ambient air temperature sensor, replacement wiring or connectors, and labor fees if done by a professional mechanic.

9. Can extreme weather conditions affect the ambient air temperature sensor and trigger OBDII code P0073 RAM?

Extreme weather conditions such as extreme heat or cold can potentially affect the ambient air temperature sensor and lead to erroneous readings, which may trigger code P0073.

10. Can I replace the ambient air temperature sensor myself to fix OBDII code P0073 RAM?

Replacing the ambient air temperature sensor can be a DIY task for those with mechanical knowledge and experience. However, if you are unsure, it is recommended to seek assistance from a qualified mechanic to ensure proper installation and resolution of the issue.

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