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2000 Pontiac Firebird DTC P0440 & DTC P0506

Tiny
DMARNES
  • MEMBER
  • 2000 PONTIAC FIREBIRD
  • V8
  • 2WD
  • MANUAL
  • 25,000 MILES
When the "Service Engine Light" goes on a put a reading coding machine into the car's computer and generated the following two codes:

P0440 & P0506

Can you help me as to how can I fix the problems for these two codes with a local mechanics. Thanks you very much in advance

david
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Monday, September 7th, 2009 AT 1:57 PM

1 Reply

Tiny
BRIAN 1
  • MECHANIC
  • 1,030 POSTS
P0506 is idle speed to low, try cleaning the throttle body first, see if that works, if not might have a problem with the IAC valve, p0440 is EVAP system, check the following first, A loose, incorrect, defective or missing fuel tank cap.

"Â Disconnected, improperly routed, kinked or damaged EVAP system purge lines.

"Â A damaged EVAP system component.

"Â A loose, missing, or damaged service port dust cap and/or schrader valve. If this test ok then use a scan tool to command the vent and purge solenoid on/off to see if it works, if not have the evap sys smoked for any leaks.
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Monday, September 7th, 2009 AT 2:04 PM

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