P0071 Code - Ambient Air Temperature Sensor Performance

Quick Answer

The P0071 code indicates an issue with the Ambient Air Temperature (AAT) sensor's performance. Common causes include Faulty Ambient Air Temperature sensor, Damaged wiring or connectors leading to the sensor, Corrosion or debris affecting the sensor's performance. 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

P0071 indicates Ambient Air Temperature Sensor Performance.

Common causes

Common causes include Faulty Ambient Air Temperature sensor, Damaged wiring or connectors leading to the sensor, Corrosion or debris affecting the sensor's performance.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
• Comments
• Add Comment

Common Causes of P0071

Symptoms of P0071

How to Fix P0071

Cost to Fix P0071

Need more information about the P0071 code?

Need more information on how to fix the P0071 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0071 code diagnosed by a professional: Find a repair shop in your area

Code P0071 Information for Specific Makes

• P0071 Audi — Ambient Air Temperature Sensor Circuit Range/Performance Fault
• P0071 BMW — Ambient Sensor Rationality Check
• P0071 Buick — Ambient Air Temperature Sensor Performance
• P0071 Cadillac — Ambient Air Temperature Sensor Performance
• P0071 Chevrolet — Ambient Air Temperature Sensor Performance
• P0071 Chrysler — Ambient Air Temperature Sensor Performance
• P0071 Dodge — Ambient Air Temperature Sensor Performance
• P0071 Ford — Ambient Air Temperature Sensor Circuit 'A' Range/Performance
• P0071 GMC — Ambient Air Temperature Sensor Performance
• P0071 Hyundai — Ambient Air Temperature Sensor Performance
• P0071 Jeep — Ambient Air Temperature Sensor Performance
• P0071 Kia — Ambient Air Temperature Sensor Performance
• P0071 Land Rover — Ambient Air Temperature Sensor Range/Performance
• P0071 Lincoln — Ambient Air Temperature Sensor Circuit 'A' Range/Performance
• P0071 Mercedes-Benz — Ambient Air Temperature Sensor Range/Performance
• P0071 MINI — Ambient Sensor Rationality Check
• P0071 Mitsubishi — Ambient Air Temperature Sensor Performance
• P0071 Volkswagen — Ambient Air Temperature Sensor Circuit Range/Performance Fault
• P0071 Volvo — Ambient Air Temperature Sensor Performance

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 P0071 Code

1. What are the common symptoms of OBDII code P0071 (Ambient Air Temperature Sensor Performance)?

- Common symptoms include inaccurate temperature readings on the dashboard, poor fuel efficiency, and potential impact on the air conditioning system.

2. What are the possible causes of OBDII code P0071?

- The code P0071 is often caused by a faulty ambient air temperature sensor, damaged wiring or connectors, or issues with the sensor's circuit.

3. How can I diagnose the issue related to OBDII code P0071?

- Diagnose the issue by checking the sensor's wiring and connectors for damage, testing the sensor's resistance, and verifying the sensor's temperature readings against actual ambient temperature.

4. How can I repair OBDII code P0071?

- Repair options may include replacing the ambient air temperature sensor, repairing damaged wiring or connectors, or resetting the error code after verifying proper sensor function.

5. Can I drive my vehicle with OBDII code P0071?

- It is generally safe to drive with code P0071, but it is important to address the issue promptly to prevent potential fuel efficiency problems or damage to other components.

6. Will OBDII code P0071 cause my check engine light to illuminate?

- Yes, code P0071 typically triggers the check engine light to alert the driver of a potential issue with the ambient air temperature sensor.

7. How do I reset OBDII code P0071 after making repairs?

- Use an OBDII scanner to clear the error code and reset the check engine light after addressing the underlying issue with the ambient air temperature sensor.

8. Can extreme weather conditions affect the performance of the ambient air temperature sensor?

- Yes, extreme heat or cold can impact the accuracy and performance of the ambient air temperature sensor, potentially leading to the triggering of code P0071.

9. What should I do if I suspect a problem with my ambient air temperature sensor but do not see OBDII code P0071?

- If you suspect an issue with the sensor but the code has not appeared, it is recommended to perform a thorough inspection and testing of the sensor to prevent potential future problems.

10. Is it possible to clean the ambient air temperature sensor to resolve issues related to OBDII code P0071?

- Cleaning the sensor may temporarily improve its performance, but if the code persists, it is advisable to replace the sensor to ensure accurate readings and prevent further issues.