AutoCodes – Buick – B0158 Buick

B0158 Buick Code - Ambient Air Temperature Sensor Circuit

Quick Answer

The Ambient Air Temperature Sensor is located behind the grille. 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: B0158 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: 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 2,900

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 Nov 07, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0158 Buick Description

The Ambient Air Temperature Sensor is located behind the grille. The instrument cluster monitors the ambient air temperature sensor with a low reference circuit and signal circuit. The instrument cluster 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 instrument cluster converts the voltage value to a temperature value and displays the temperature.

OBDII Code B0158 Buick - Ambient Air Temperature Sensor Circuit - AutoCodes.com — B0158 Buick Code - Ambient Air Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC B0158 Buick?

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

How to Fix the DTC B0158 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 does this mean?

Code Tech Notes

B0158:02 Ambient Air Temperature Sensor Circuit Short to Ground
B0158:05 Ambient Air Temperature Sensor Circuit High Voltage/Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0158 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.

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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 B0158 Buick Code

1. What are the common symptoms of OBDII code B0158 in a Buick related to the Ambient Air Temperature Sensor Circuit?

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

2. What are the possible causes of OBDII code B0158 in a Buick?

- The code B0158 in a Buick is often triggered by a faulty ambient air temperature sensor, damaged wiring or connectors in the circuit, or a failed climate control module.

3. How can I diagnose the Ambient Air Temperature Sensor Circuit issue in my Buick?

- Diagnosing the issue involves checking the sensor's wiring and connectors for any signs of damage, testing the sensor's resistance with a multimeter, and verifying the sensor's readings against actual ambient temperature.

4. Can I drive my Buick with OBDII code B0158 without immediate repairs?

- While driving with the code B0158 may be possible, it is advisable to address the issue promptly to avoid potential discomfort due to incorrect temperature readings and to prevent further damage to the climate control system.

5. What are some DIY repair tips for fixing OBDII code B0158 in a Buick?

- DIY repair tips include inspecting the sensor's wiring for any frays or breaks, cleaning the sensor and its surroundings to ensure accurate readings, and resetting the fault codes after making any necessary repairs.

6. How much does it cost to repair OBDII code B0158 related to the Ambient Air Temperature Sensor Circuit in a Buick?

- The cost of repairing OBDII code B0158 can vary depending on the extent of the issue, but it typically ranges from $100 to $300, including parts and labor.

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

- Yes, a faulty sensor can impact the accuracy of the climate control system, affect the performance of the air conditioning, and potentially lead to other related issues if left unaddressed.

8. Is it possible to bypass or ignore OBDII code B0158 in a Buick?

- While it may be possible to ignore the code temporarily, it is not recommended as it can lead to discomfort, inaccurate temperature control, and potentially cause further damage to the vehicle's climate control system.

9. How long does it typically take to repair OBDII code B0158 in a Buick?

- The repair time for OBDII code B0158 related to the Ambient Air Temperature Sensor Circuit in a Buick can vary, but it usually takes around 1 to 2 hours for a professional technician to diagnose and fix the issue.

10. Will resetting the OBDII codes clear OBDII code B0158 permanently?

- Resetting the OBDII codes may temporarily clear the code B0158, but if the underlying issue with the Ambient Air Temperature Sensor Circuit is not fixed, the code is likely to reappear.