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Engine-Codes – Generic – B0159

B0159 Code - Ambient Air Temperature Sensor Circuit Range/Performance

Quick Answer

The B0159 diagnostic trouble code (DTC) refers to the Ambient Air Temperature Sensor Circuit Range/Performance. Common causes include Faulty ambient air temperature sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to the sensor. 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
B0159 indicates Ambient Air Temperature Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty ambient air temperature sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to the sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B0159 Description

The B0159 diagnostic trouble code (DTC) refers to the Ambient Air Temperature Sensor Circuit Range/Performance. This code indicates that there is a problem with the ambient air temperature sensor, which is responsible for monitoring the outside air temperature. The ambient air temperature sensor provides crucial data to the vehicle's engine control module (ECM) to adjust fuel delivery and ignition timing for optimal performance and efficiency.

OBDII Code B0159 - Ambient Air Temperature Sensor Circuit Range/Performance
B0159 Code - Ambient Air Temperature Sensor Circuit Range/Performance

Common Causes of B0159

  1. Faulty ambient air temperature sensor
  2. Wiring or connection issues in the sensor circuit
  3. Corrosion or damage to the sensor
  4. ECM software or hardware malfunctions
  5. Environmental factors affecting sensor operation, such as exposure to heat or moisture

Symptoms of B0159

  1. Incorrect temperature readings on the dashboard display
  2. Poor fuel efficiency
  3. Engine stalling or rough idling
  4. Inconsistent operation of the climate control system
  5. Illumination of the check engine light

How to Fix B0159

  1. Perform a visual inspection of the ambient air temperature sensor and its wiring for any visible damage or corrosion.
  2. Test the sensor's resistance using a multimeter to determine if it is within the manufacturer's specifications.
  3. Replace the ambient air temperature sensor if it is found to be faulty or out of range.
  4. Clear the DTC using a scan tool and monitor the sensor's operation to ensure accurate readings.
  5. Test drive the vehicle to verify that the issue has been resolved and that the check engine light does not reappear.

Cost to Fix B0159

The cost of repairing the Ambient Air Temperature Sensor Circuit Range/Performance issue can vary depending on the make and model of the vehicle, as well as the labor rates in your area. On average, the cost of replacing the ambient air temperature sensor and addressing any related wiring issues can range from $100 to $300. Additional costs may apply if other components need to be replaced or if further diagnostics are required. It is recommended to consult with a certified mechanic or auto repair shop for a more accurate cost estimate based on your specific vehicle and location.

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Code B0159 Information for Specific Makes

  • B0159 Buick — Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 Cadillac — Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 Chevrolet — Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 GMC — Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 Hummer — Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 Pontiac — Ambient Air Temperature Sensor Circuit Range/Performance
  • B0159 Saturn — Ambient Air Temperature Sensor Circuit Range/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 B0159 Code

1. What are the common symptoms of OBDII code B0159 (Ambient Air Temperature Sensor Circuit Range/Performance)?

The common symptoms include inaccurate temperature readings on the vehicle's display, issues with the climate control system, and potential effects on fuel efficiency.

2. What are the possible causes of OBDII code B0159?

Possible causes of this code include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's calibration.

3. How can I diagnose the root cause of OBDII code B0159?

Diagnosing the issue involves using a multimeter to test the ambient air temperature sensor's resistance, checking the sensor's wiring for continuity and damage, and verifying the sensor's calibration against known temperature values.

4. Can I drive my vehicle with OBDII code B0159?

While the vehicle may still be drivable with this code, it is recommended to address the issue promptly to prevent potential impacts on the vehicle's performance and fuel efficiency.

5. How can I repair OBDII code B0159?

Repair options include replacing the ambient air temperature sensor, repairing or replacing damaged wiring or connectors, and recalibrating the sensor as per manufacturer specifications.

6. Will resetting the OBDII code B0159 resolve the issue?

Resetting the code may temporarily clear the error from the system, but if the root cause is not addressed, the code is likely to reappear. It is essential to diagnose and repair the underlying problem.

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

Yes, extreme temperatures or exposure to moisture can impact the sensor's accuracy and performance, potentially leading to the triggering of OBDII code B0159.

8. How do I locate the ambient air temperature sensor in my vehicle?

The sensor is typically located behind the front grille, in the front bumper, or near the radiator. Refer to your vehicle's service manual for specific location details.

9. Are there any DIY tips for troubleshooting OBDII code B0159?

DIY troubleshooting tips include visually inspecting the sensor and its wiring for damage, checking for loose connections, and ensuring the sensor is not obstructed by debris.

10. Will OBDII code B0159 cause my check engine light to illuminate?

Yes, OBDII code B0159 is likely to trigger the check engine light to illuminate on the vehicle's dashboard, indicating a potential issue with the ambient air temperature sensor circuit.

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