p0496
Moderate
Cadillac · Sedans
Evaporative Emission Control System High Purge Flow
Quick Answer
Error code P0496 on your Cadillac Sedans means: Evaporative Emission Control System High Purge Flow. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect purge control valve for proper operation
2
Check vacuum supply to valve
3
Test purge flow rate with smoke test
4
Verify canister condition
5
Reprogram or replace purge control valve
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
Purge control valve
Vacuum hose
Carbon canister
Flow meter
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