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P0449 Diagnostic for 2011 Cadillac SRX: How to Fix Evaporative Emission System Fault

Model: 2011 Cadillac SRX Fault Code: P0449 Posted: 2014-04-26 10:06

My 2011 Cadillac SRX is displaying the P0449 diagnostic trouble code. I'm looking for a step-by-step guide to diagnose and resolve this issue related to the evaporative emission system. The code indicates a problem with the purge valve circuit, so I'd like to know how to check the vent valve's 12V power supply at the KOEO pink wire and verify proper wiring connections.

Related fault codes
P0449
Comments (1)
Anonymous 2014-04-26 12:04

Check the vent valve for 12V power at the KOEO pink wire. Disconnect the connector and test if the switching wire (unknown color) is properly grounded when the engine is off to confirm circuit integrity.