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Diagnostic Trouble Code: B0012
Diagnostic Trouble Code Name: Driver Frontal Deployment Loop Stage 1
Vehicle Make: Chevrolet
Vehicle Model: Caprice (VE)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Outside Air Quality Sensor Circuit
Possible Sensor Faults
Heater and Blower and Air Conditioning Control Module
Possible Related Diagnostic Trouble Codes
DTC B3843
Circuit / System Description
The HVAC control module detects exhaust gas by an air quality sensor. The air quality sensor is a 3-wire sensor with an ignition voltage circuit, a ground circuit and a signal circuit.
The information is pulse width modulation (PWM) signal generated on the output pin.
The HVAC control module evaluates the information of the air quality sensor and closes the recirculation flap while in the automatic mode, as soon as the concentration of pollutants exceeds a preset value.
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