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
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FACTORYJACK
  • ✓ASE Certified Mechanic
  • 4,159 POSTS
  • ASE Certified Mechanic
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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