EVAP Service Bay Test

WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, 2003 Chevrolet Monte Carlo, and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The EVAP Service Bay Test is accessed with a scan tool, and allows EVAP diagnostic tests to be run at a higher Engine Coolant Temperature (ECT) than is allowed during normal testing. The EVAP Service Bay Test allows all of the above tests to be run without road testing the vehicle. When the EVAP Service Bay Test is run, the scan tool will indicate the test passed, or which specific Diagnostic Trouble Code (DTC) has failed. If a EVAP Service Bay Test fails, no DTCs will be recorded in the PCM Freeze Frame/Failure Records. They will only be displayed on the scan tool. The EVAP Service Bay Test is useful in determining if a fault is present, and for verifying a repair. Using a scan tool, select the Service Bay Test from the special functions menu, and follow the on-screen directions.