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Engine-Codes – Generic – P0070

P0070 Code - Ambient Air Temperature Sensor Circuit

Quick Answer

The P0070 diagnostic trouble code (DTC) refers to an issue with the Ambient Air Temperature (AAT) Sensor Circuit. Common causes include Faulty Ambient Air Temperature sensor, Wiring or connector issues in the AAT sensor circuit, Corrosion or damage to the sensor or its 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
P0070 indicates Ambient Air Temperature Sensor Circuit.
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 its 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 P0070 Description

The P0070 diagnostic trouble code (DTC) refers to an issue with the Ambient Air Temperature (AAT) Sensor Circuit. The AAT sensor is responsible for measuring the temperature of the air surrounding the vehicle. This information is crucial for the engine control module (ECM) to adjust fuel delivery, ignition timing, and other parameters to optimize performance, fuel efficiency, and emissions.

OBDII Code P0070 - Ambient Air Temperature Sensor Circuit
P0070 Code - Ambient Air Temperature Sensor Circuit

Common Causes of P0070

  1. Faulty Ambient Air Temperature sensor.
  2. Wiring or connector issues in the AAT sensor circuit.
  3. Corrosion or damage to the sensor or its wiring.
  4. ECM software or hardware problems.
  5. Environmental factors such as extreme temperatures affecting sensor performance.

Symptoms of P0070

  1. Check Engine Light illuminated on the dashboard.
  2. Inaccurate temperature readings displayed on the vehicle's information display.
  3. Engine running rough or misfiring.
  4. Decreased fuel efficiency.
  5. Increased emissions output.

How to Fix P0070

  1. Begin by locating the Ambient Air Temperature sensor, typically mounted on the front bumper or near the grille.
  2. Inspect the sensor and its wiring for any visible damage, corrosion, or loose connections.
  3. Test the sensor using a multimeter to check for proper resistance values.
  4. If the sensor is faulty, replace it with a new one following manufacturer's guidelines.
  5. Clear the DTC codes using an OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0070

The cost of repairing the Ambient Air Temperature sensor circuit can vary depending on the cause of the issue and the vehicle's make and model. In general, replacing the AAT sensor itself can range from $50 to $150, while labor costs may add an additional $50 to $100. Overall, the total repair cost for addressing the P0070 code typically falls between $100 and $250. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your specific vehicle and location.

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Code P0070 Information for Specific Makes

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.

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