B0158 GMC Code - Ambient Air Temperature Sensor Circuit
Quick Answer
The B0158 GMC code indicates a problem with the ambient air temperature sensor circuit in the vehicle. Common causes include Damaged ambient air temperature sensor, Faulty wiring or connections in the sensor circuit, Corrosion or debris affecting 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
- B0158 GMC indicates Ambient Air Temperature Sensor Circuit.
- Common causes
- Common causes include Damaged ambient air temperature sensor, Faulty wiring or connections in the sensor circuit, Corrosion or debris affecting 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.
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Code B0158 GMC Description
The B0158 GMC code indicates a problem with the ambient air temperature sensor circuit in the vehicle. The ambient air temperature sensor is responsible for measuring the outside air temperature and sending this information to the vehicle's engine control module. This data is crucial for various systems in the vehicle, such as the HVAC system, engine performance, and fuel efficiency. When this sensor circuit fails, it can lead to inaccurate temperature readings, affecting the vehicle's overall performance.
Common Causes of B0158 GMC
- Damaged ambient air temperature sensor
- Faulty wiring or connections in the sensor circuit
- Corrosion or debris affecting the sensor
- Electrical issues in the sensor circuit
- Engine control module malfunction
Symptoms of B0158 GMC
- Incorrect temperature readings on the dashboard display
- Inconsistent HVAC system operation
- Poor fuel efficiency
- Engine performance issues
- Check Engine Light illuminated
How to Fix B0158 GMC
- Begin by locating the ambient air temperature sensor, usually located behind the front grille or bumper.
- Inspect the sensor and its wiring for any visible damage or corrosion.
- Test the sensor using a multimeter to check for proper resistance values.
- If the sensor is faulty, replace it with a new OEM sensor.
- Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.
Cost to Fix B0158 GMC
The cost of repairing the ambient air temperature sensor circuit can vary depending on the make and model of the vehicle, as well as the location and labor rates of the auto repair shop. On average, the parts for this repair may cost between $50 and $100, while labor costs can range from $100 to $200. Overall, the total repair cost could fall between $150 and $300. It's important to consult with a professional mechanic to get an accurate estimate for your specific vehicle.
Tech Notes for B0158 GMC
B0158:05 Ambient Air Temperature Sensor Circuit High Voltage/Open
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Information for Specific GMC Models
- B0158 2014 GMC Sierra — Ambient Air Temperature Sensor Circuit
- B0158 2015 GMC Sierra — Ambient Air Temperature Sensor Circuit
- B0158 2016 GMC Sierra — Ambient Air Temperature Sensor Circuit
- B0158 2017 GMC Sierra — Ambient Air Temperature Sensor Circuit
- B0158 2018 GMC Sierra — Ambient Air Temperature Sensor Circuit
Frequently Asked Questions about B0158 GMC Code
1. What does the OBDII code B0158 indicate on a GMC vehicle?
Code B0158 indicates a fault in the Ambient Air Temperature Sensor Circuit, suggesting that the sensor or circuit is not performing within the expected parameters.
2. What are the common symptoms of code B0158 in a GMC?
Symptoms may include incorrect outside temperature readings displayed on the dash, possible effects on the HVAC system's efficiency, and sometimes issues with automatic climate control.
3. What causes the OBDII code B0158 to appear on a GMC?
Common causes include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or a problem with the control module receiving the sensor's data.
4. How do I fix the B0158 code on a GMC?
Fixing this code involves inspecting and potentially replacing the ambient air temperature sensor, repairing any damaged wires or connectors, and ensuring the control module is functioning correctly.
5. Where is the ambient air temperature sensor located in a GMC vehicle?
The ambient air temperature sensor is typically located in front of the radiator or behind the front grille, to accurately gauge the temperature of the air entering the engine and cabin.
6. Can I drive my GMC with the B0158 code active?
While you can drive your vehicle, the inaccurate temperature readings may affect the performance of the HVAC system, leading to discomfort or less optimal climate control.
7. Will the B0158 code clear itself once the issue is fixed, or do I need to reset something?
After repairing the issue, the code should clear after a few driving cycles. However, manually clearing the code with an OBDII scanner is often quicker and ensures the repair was successful.
8. What tools are needed to diagnose and repair the B0158 code on a GMC?
Diagnosis and repair commonly require a multimeter for checking electrical continuity, an OBDII scanner to read and clear codes, and basic hand tools to access the sensor.
9. How does the ambient air temperature sensor affect my GMC’s performance?
The sensor primarily affects the HVAC system's operation but can also influence engine management systems, such as fuel mixture and emissions control, under certain conditions.
10. What should I check first if I get a B0158 code on my GMC?
First, check the condition of the ambient air temperature sensor itself and its wiring. Look for any signs of damage, corrosion, or disconnections that could be causing the issue.
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