1999 Cadillac SLS p0440

1999 CADILLAC SLS
113,000 MILES • V8 • FWD • AUTOMATIC
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CGARGIS
  • MEMBER
  • 2 POSTS
okay.. so im having trouble with a GM gremlin. p0440 code for the evap system.. was wondering where i should start and what to look for...
Mar 3, 2010 at 1:32 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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FACTORYJACK
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 4,159 POSTS
Initially, it could have a loose or leaking fuel cap. Could have a faulty fuel tank pressure sensor, leaking fuel sender seal, faulty vent or purge solenoid, canister, or lines. You need to at least have scan tool capabilities.
Mar 3, 2010 at 10:07 PM
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