p0496
Moderate
Cadillac · SUVs
Evaporative Emission Control System High Purge Flow
Quick Answer
Error code P0496 on your Cadillac SUVs means: Evaporative Emission Control System High Purge Flow. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
  1. Faulty purge control solenoid
  2. Leaking fuel tank filler cap
  3. Charcoal canister purge hose leak
  4. Engine vacuum leak
How to Fix It
1
Diagnose with OBD2 scanner
2
Check fuel tank filler cap seal
3
Inspect purge hoses for damage
4
Test purge solenoid with multimeter
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Fuel cap
Purge solenoid
Hoses and clamps
Related Error Codes
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