DTC P0455 — EVAP Emission Control System Leak Detected (Large Leak)
P0455 indicates: EVAP Emission Control System Leak Detected (Large Leak).
Diagnostic summary
P0455
What it means
EVAP Emission Control System Leak Detected (Large Leak)
Can you drive?
⚠️ Drive with caution
Urgency
Medium 5/10
Typical price
$20 – $350
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Updated May 7, 2026 Seen on Powertrain
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ℹ️ What does it mean?
EVAP Emission Control System Leak Detected (Large Leak)
🔍 Symptoms
- • Check Engine Light on
- • Reduced engine performance
- • Increased fuel consumption
- • Unusual engine behavior
⚠️ Possible Causes
- ⚠ Missing gas cap
- ⚠ Major EVAP hose crack
- ⚠ Purge valve stuck open
- ⚠ Canister damage
🚗 Can I drive with this code?
Drive with caution
Drive with caution. Schedule a repair soon.
🔧 How to Diagnose
- 1 Read DTCs with OBD-II scanner
- 2 Check freeze frame data
- 3 Inspect related components
- 4 Clear codes and test drive
🛠️ How to Fix
- 1 Replace gas cap
- 2 Replace damaged hose
- 3 Replace purge valve
- 4 Inspect canister
💰 Estimated Repair Cost
Repair cost by car / region
Early rough estimate. Accuracy improves as more real repair stories are added.
DIY / parts$7 – $228
Mechanic / labor$9 – $263
Repair range$20 – $350
❓ FAQ
What does P0455 mean?
EVAP Emission Control System Leak Detected (Large Leak)
How serious is P0455?
Severity: medium. Drive with caution. Schedule a repair soon.
How much does it cost to fix P0455?
Estimated repair cost: $20–$350 depending on vehicle and region.
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