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HD21 - Check Evaporative Emission System



The Misfire Monitor can be influenced by Evaporative Emission System. The next four Pinpoint Test Steps will evaluate the Evaporative Emission System.

- Check the carbon canister for fuel saturation.

- Is there an excess amount of liquid fuel present in the canister?

YES -- REPLACE carbon canister. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- GO to HD22. CHECK fuel tank vent system. HD22 - Pressure Test Evaporative System
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