B0158:02 Code - Ambient Air Temperature Sensor Circuit Short to Ground
Quick Answer
The B0158:02 diagnostic trouble code indicates that there is a short to ground in the ambient air temperature sensor circuit. Common causes include Damaged ambient air temperature sensor, Corrosion or loose connection in the sensor circuit, Faulty wiring harness. 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
- B0158:02 indicates Ambient Air Temperature Sensor Circuit Short to Ground.
- Common causes
- Common causes include Damaged ambient air temperature sensor, Corrosion or loose connection in the sensor circuit, Faulty wiring harness.
- 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 B0158:02 Description
The B0158:02 diagnostic trouble code indicates that there is a short to ground in the ambient air temperature sensor circuit. The ambient air temperature sensor is responsible for measuring the outside air temperature and sending this information to the vehicle's engine control module (ECM). This data is crucial for the ECM to adjust various engine parameters, such as fuel mixture, ignition timing, and emissions control, based on the current ambient conditions.
Common Causes of B0158:02
- Damaged ambient air temperature sensor
- Corrosion or loose connection in the sensor circuit
- Faulty wiring harness
- Issues with the ECM
- Environmental factors such as water intrusion or debris obstructing the sensor
Symptoms of B0158:02
- Check engine light illuminated
- Inaccurate outside temperature readings displayed on the vehicle's dashboard
- Poor fuel efficiency
- Rough idling or hesitation during acceleration
- Engine stalling
How to Fix B0158:02
- Begin by locating the ambient air temperature sensor, typically located behind the front grille or bumper.
- Inspect the sensor and its wiring harness for any signs of damage, corrosion, or loose connections.
- Test the sensor using a multimeter to verify if it is functioning correctly.
- If the sensor is faulty, replace it with a new one and ensure proper installation.
- Clear the diagnostic trouble codes using a scan tool and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix B0158:02
The cost estimate for repairing a short to ground in the ambient air temperature sensor circuit can vary depending on the specific vehicle make and model, as well as the location and labor rates of the auto repair shop. On average, the parts for this repair may range from $50 to $150, while the labor cost could be between $100 to $200. It is advisable to contact local auto repair shops for a more accurate estimate based on the individual circumstances.
Tech Notes for B0158:02
B0158:05 Ambient Air Temperature Sensor Circuit High Voltage/Open
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