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Diagnostic Trouble Code: B0021
Diagnostic Trouble Code Name: Passenger Side Deployment Loop
Vehicle Make: Chevrolet
Vehicle Model: Camaro (Fifth Generation)
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:
Fuel Pressure Regulator Control Circuit
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P0090, P0091, or P0092
Circuit / System Description
High pressure fuel is regulated by the fuel rail pressure (FRP) regulator, which is a part of the high pressure fuel pump. The FRP regulator is a solenoid valve. The ECM provides battery voltage on the FRP regulator high circuit and ground on the FRP regulator low circuit. Both circuits are controlled through output drivers within the ECM. When deactivated, both drivers are disabled. When activated, the FRP regulator low circuit driver connects the low circuit to ground and the FRP regulator high circuit driver pulse-width modulates (PWM) the high circuit. The ECM monitors the voltage on the circuits to detect a failure.
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