2004 Pontiac Grand Prix check engine

Tiny
RICKBRUNK
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 80,000 MILES
The code is PO449. I have replaced the solenoid/valve, gas cap, it still won't clear. What else could it be?
Thursday, August 6th, 2009 AT 2:37 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Vent control circuit malfunction.

The easiest way is to have someone with a high end scanner to test all the solenoids and relays in the EVAP system. This error could also be electrical rather than mechanical.
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Saturday, August 8th, 2009 AT 9:30 AM

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