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Diagnostic Trouble Code: 021
Diagnostic Trouble Code Name: Rear Defrost Request Switch Circuit
Vehicle Make: Chevrolet
Vehicle Model: Tosca (V250)
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:
Barometric Pressure Sensor Circuit
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P2226, P2228, or P2229
Circuit / System Description
The BARO sensor is integrated within the engine control module (ECM). The barometric pressure (BARO) sensor responds to changes in altitude and atmospheric conditions. The BARO sensor provides the ECM an indication of barometric pressure. The BARO sensor provides a voltage signal to the ECM relative to the atmospheric pressure changes. The ECM monitors the BARO sensor signal for a voltage outside of the normal range.
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