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P0449 is a diagnostic trouble code (DTC) for "Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
P0449 is a general OBD2 diagnostic trouble code indicating an issue with the EVAP vent control circuit. This code may be seen with other EVAP system codes
The P0449 DTC means that the evaporative emission control system vent valve or solenoid has a malfunction. The ECU detects this fault and causes the Check Engine Light to be illuminated on the dashboard.
Uses a scan tool to check for any codes stored in the ECU including history or pending codes
Take note of the freeze frame data associated with the codes this is the conditions the vehicle was under when the malfunction set the Check Engine Light
Clears all of the codes
Takes the vehicle on a road test to confirm any symptoms that are present
Performs a visual inspection of the wiring harness and the vent valve looking for any damage
Uses an advanced scan tool to operate the EVAP functions and enables the vent valve to function, checking for proper operation
Checks for continuity between the vent wiring and ECU
Perform a test on the ECU
Mistakes can be made with any code when steps are not followed or aren’t completed at all. All components must be tested for proper operation thoroughly before they are replaced otherwise perfectly working parts may be replaced unnecessarily.
P0449 is an emissions control code and will cause the vehicle to fail OBD2 based emissions. Other than failing the emissions the fuel odor may bother some drivers. This code should not prevent normal vehicle operation but should still be repaired ASAP.
Advanced level scans are extremely helpful when diagnosing EVAP system codes. These scan tools allow technicians to use the vehicle's EVAP self test procedures and let the user command on and off EVAP valves and solenoids. WIthout an advanced level scan tool these procedures can not be performed and diagnosis becomes much more difficult.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.