AutoCodes – Generic – B0161

B0161 Code - Ambient Air Temperature Sensor Low

Quick Answer

The Driver Information Center (DIC) applies 5 volts to the ambient air temperature sensor. 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 Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0161 indicates Ambient Air Temperature Sensor Low.
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: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,600

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0161 Description

The Driver Information Center (DIC) applies 5 volts to the ambient air temperature sensor. The ambient air temperature sensor is a thermistor which varies in resistance as the temperature changes. As the resistance of the ambient air temperature sensor increases, the DIC senses a larger voltage drop across the sensor, indicating a lower temperature. As the resistance of the ambient air temperature sensor decreases, the DIC senses a smaller voltage drop across the sensor, indicating a higher temperature.

OBDII Code B0161 - Ambient Air Temperature Sensor Low - AutoCodes.com — B0161 Code - Ambient Air Temperature Sensor Low

What does this mean?

What are the Possible Causes of the DTC B0161?

Faulty Ambient Air Temperature Sensor
Ambient Air Temperature Sensor harness is open or shorted
Ambient Air Temperature Sensor circuit poor electrical connection

How to Fix the DTC B0161?

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 B0161 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 B0161 code?

Need more information on how to fix the B0161 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0161 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0161 Buick — Ambient Air Temperature Sensor Low
B0161 Cadillac — Ambient Air Temperature Sensor Low
B0161 Chevrolet — Ambient Air Temperature Sensor Low
B0161 GMC — Ambient Air Temperature Sensor Low
B0161 Pontiac — Ambient Air Temperature Sensor Low
B0161 Saturn — Ambient Air Temperature Sensor Low

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 B0161 Code

1. What are the common symptoms of OBDII code B0161 Ambient Air Temperature Sensor Low?

- Common symptoms include inaccurate temperature readings on the vehicle's display, issues with climate control system, and potential impact on engine performance.

2. What can cause the Ambient Air Temperature Sensor Low code to trigger?

- The code B0161 may be triggered by a malfunctioning ambient air temperature sensor, damaged wiring or connectors, or issues with the sensor's circuit.

3. How does the ambient air temperature sensor affect the vehicle's operation?

- The ambient air temperature sensor provides crucial data for the climate control system, engine performance, and other vehicle functions that rely on external temperature information.

4. What are some DIY repair tips for fixing the Ambient Air Temperature Sensor Low issue?

- DIY repair tips may include visually inspecting the sensor and its connections for damage, checking the wiring for any breaks or corrosion, and replacing the sensor if necessary.

5. Can driving with the B0161 code cause any long-term damage to the vehicle?

- Driving with the Ambient Air Temperature Sensor Low code should not cause immediate harm to the vehicle, but it may impact certain systems that rely on accurate temperature readings.

6. How can I reset the OBDII code B0161 after fixing the issue?

- The code B0161 can be cleared using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to reset the system.

7. Is it safe to continue driving with the Ambient Air Temperature Sensor Low code illuminated?

- It is generally safe to drive with the code illuminated, but it is recommended to address the underlying issue promptly to ensure accurate temperature readings and proper vehicle operation.

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

- Extreme heat or cold can potentially affect the ambient air temperature sensor's performance, leading to inaccurate readings and triggering the B0161 code.

9. How much does it typically cost to replace the ambient air temperature sensor?

- The cost of replacing the ambient air temperature sensor can vary depending on the make and model of the vehicle, but it generally ranges from $50 to $150 for the part, excluding labor costs.

10. Are there any recalls or technical service bulletins related to the B0161 Ambient Air Temperature Sensor Low code?

- It is recommended to check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to the B0161 code to address potential known issues or updates.