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Diagnostic Trouble Code: 034
Diagnostic Trouble Code Name: Absence of Immobilizer Antennae/Link Error
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:
EVAP System Small Leak
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTCP0442
Circuit / System Description
The evaporative emission (EVAP) small leak test applies vacuum to the EVAP system and monitors vacuum decay. The control module monitors the fuel tank pressure sensor signal to determine the vacuum decay rate. At an appropriate time, the EVAP canister purge solenoid valve and the EVAP vent valve are turned ON. This allows the engine to draw vacuum on the EVAP system. After the desired vacuum level has been achieved, the EVAP purge valve is turned OFF, sealing the system. A leak is detected by monitoring for a decrease in vacuum level during a given time period. If the system detects a leak larger than a calibrated amount, DTC?P0442 will set.
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