p0455
Moderate
Cadillac · SUVs
Evaporative Emission Control System Leak Detected (Gross Leak)
Quick Answer
Error code P0455 on your Cadillac SUVs means: Evaporative Emission Control System Leak Detected (Gross Leak). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Scan vehicle and note code
2
Visually inspect for fuel odor or leaks
3
Check fuel tank and hoses
4
Replace fuel cap or repair leaks
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
Evap hoses
Fuel tank repair kit
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