AutoCodes – Hyundai – P0071 Hyundai

P0071 Hyundai Code - Ambient Air Temperature Sensor Performance

Quick Answer

The Engine Control Module (ECM) monitors the ambient air temperature sensor with a low reference circuit and signal circuit. Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection. 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 Hyundai indicates Ambient Air Temperature Sensor Performance.
Common causes: Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection.
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 Popularity 1,635

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 17, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0071 Hyundai Description

The Engine Control Module (ECM) monitors the ambient air temperature sensor with a low reference circuit and signal circuit. The ECM monitors the voltage drop across the sensor, which is inversely proportional to temperature. When the ambient air temperature is cold, the resistance of the sensor is high. When the ambient air temperature is warm, the resistance of the sensors is low. The engine control module converts the voltage value to a temperature value and sends the value to the Display Module via serial data. The Display Module displays the temperature. The Diagnostic Trouble Code (DTC) will be set if the ECM detects that during the first 20s of run time after the 1 hour soaking period, the difference between the outside air temperature and the engine intake air temperature is greater than 30°C (86°F).

OBDII Code P0071 Hyundai - Ambient Air Temperature Sensor Performance - AutoCodes.com — P0071 Hyundai Code - Ambient Air Temperature Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P0071 Hyundai?

Faulty Ambient Air Temperature Sensor
Ambient Air Temperature Sensor harness is open or shorted
Ambient Air Temperature Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0071 Hyundai?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0071 Hyundai code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0071 Hyundai code?

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Information for Specific Hyundai Models

P0071 2011 Hyundai Sonata — 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 Hyundai Code

1. What are common symptoms of OBDII code P0071 in a Hyundai related to the Ambient Air Temperature Sensor Performance?

Symptoms may include inaccurate temperature readings on the dashboard, poor fuel efficiency, and potential issues with the vehicle's air conditioning system.

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

The code P0071 typically indicates a problem with the ambient air temperature sensor, which may be caused by a faulty sensor, wiring issues, or a poor connection.

3. How can I diagnose the Ambient Air Temperature Sensor issue causing OBDII code P0071 in my Hyundai?

You can use a multimeter to test the sensor's resistance, check for any visible damage to the sensor or wiring, and ensure the sensor is receiving power and ground properly.

4. Can a dirty or obstructed Ambient Air Temperature Sensor trigger OBDII code P0071 in a Hyundai?

Yes, dirt, debris, or physical damage to the sensor can affect its performance and trigger the OBDII code P0071.

5. How can I repair the Ambient Air Temperature Sensor issue associated with OBDII code P0071 in my Hyundai?

Repairing the issue may involve replacing the ambient air temperature sensor, repairing or replacing damaged wiring, or ensuring a secure connection.

6. Can driving with OBDII code P0071 in a Hyundai cause any further damage to the vehicle?

Continuing to drive with the code P0071 may lead to poor engine performance, reduced fuel efficiency, and potential issues with the vehicle's emissions system over time.

7. Is it safe to ignore OBDII code P0071 related to the Ambient Air Temperature Sensor in a Hyundai?

It is not recommended to ignore the code, as addressing the underlying issue promptly can prevent further damage and ensure optimal vehicle performance.

8. Can extreme weather conditions impact the performance of the Ambient Air Temperature Sensor in a Hyundai?

Extreme temperatures, such as excessive heat or cold, can affect the sensor's readings and potentially trigger OBDII code P0071 in a Hyundai.

9. Will resetting the OBDII codes clear OBDII code P0071 related to the Ambient Air Temperature Sensor in a Hyundai?

Resetting the codes may temporarily clear the warning light, but if the underlying issue with the ambient air temperature sensor is not addressed, the code is likely to reappear.

10. How much does it typically cost to repair the Ambient Air Temperature Sensor issue causing OBDII code P0071 in a Hyundai?

The cost of repairs can vary depending on the extent of the issue and whether you choose to replace the sensor yourself or have it serviced by a mechanic. Costs may range from $50 to $200.