AutoCodes – Buick – P0070 Buick

P0070 Buick Code - Ambient Air Temperature Sensor Circuit

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: P0070 Buick indicates Ambient Air Temperature Sensor Circuit.
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 441

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 May 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0070 Buick 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 when the ECM detects the Ambient Air Temperature Sensor is not to factory specifications.

OBDII Code P0070 Buick - Ambient Air Temperature Sensor Circuit - AutoCodes.com — P0070 Buick Code - Ambient Air Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P0070 Buick?

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 P0070 Buick?

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 P0070 Buick 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 P0070 Buick code?

Need more information on how to fix the P0070 Buick code? Get Access to Factory Service Manuals

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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 P0070 Buick Code

1. What are the common symptoms of OBDII code P0070 in a Buick related to the Ambient Air Temperature Sensor circuit?

The common symptoms include inaccurate temperature readings on the dashboard, issues with the HVAC system, and potential decreases in fuel efficiency.

2. What typically causes the OBDII code P0070 in a Buick related to the Ambient Air Temperature Sensor circuit?

The code is usually triggered by a faulty ambient air temperature sensor, damaged wiring or connectors, or a malfunction in the sensor circuit.

3. How can I diagnose the issue causing OBDII code P0070 in my Buick?

You can use a multimeter to test the ambient air temperature sensor for proper resistance readings, visually inspect the sensor and its wiring for any damage, and check for loose connections or corrosion in the circuit.

4. Can I drive my Buick with OBDII code P0070 related to the Ambient Air Temperature Sensor circuit?

While it may be possible to drive the vehicle with this code, it is not recommended as it can lead to inaccurate temperature readings and potentially affect the performance of the HVAC system.

5. How can I repair OBDII code P0070 in my Buick related to the Ambient Air Temperature Sensor circuit?

The repair usually involves replacing the faulty ambient air temperature sensor, repairing any damaged wiring or connectors, and clearing the trouble code with an OBDII scanner.

6. Are there any DIY tips for fixing OBDII code P0070 in a Buick myself?

If you have the necessary tools and experience, you can attempt to replace the ambient air temperature sensor and inspect the wiring for any visible damage. However, it's recommended to consult a professional if you're unsure.

7. Can a malfunctioning Ambient Air Temperature Sensor affect other systems in my Buick?

Yes, a malfunctioning sensor can impact the accuracy of temperature-related functions in your vehicle, such as the HVAC system, engine performance, and fuel efficiency.

8. How long does it typically take to repair OBDII code P0070 in a Buick related to the Ambient Air Temperature Sensor circuit?

The repair time can vary depending on the extent of the issue, but replacing the sensor and addressing any wiring problems usually takes around 1-2 hours.

9. Will OBDII code P0070 in my Buick reset on its own after the issue is fixed?

In some cases, the code may reset on its own after a certain number of drive cycles once the underlying issue has been resolved. However, it's recommended to use an OBDII scanner to clear the code manually.

10. Is it necessary to visit a dealership for repairs related to OBDII code P0070 in a Buick?

While you can visit a dealership for repairs, any qualified automotive technician should be able to diagnose and repair the issue related to the Ambient Air Temperature Sensor circuit in your Buick.