Code 449

Tiny
PMASPKS
  • MEMBER
  • 2004 CADILLAC DEVILLE
  • V8
I have a code 449. What is this? Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
Monday, November 29th, 2010 AT 12:30 AM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
It can relate to a faulty vent solenoid valve back near the tank, a control circuit fault, or even a control module. To test it efficiently, a scan tool would be best, one that has capability to control the solenoid. A simple test light in place of the solenoid will tell you if the circuit is capable of being controlled, and also test the solenoid for operation.
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Wednesday, December 1st, 2010 AT 6:08 AM

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