DTC P0457 — EVAP Emission Control System Leak Detected (Fuel Cap Loose/Off)
P0457 indicates: EVAP Emission Control System Leak Detected (Fuel Cap Loose/Off).
Diagnostic summary
P0457
What it means
EVAP Emission Control System Leak Detected (Fuel Cap Loose/Off)
Can you drive?
✅ Safe to drive
Urgency
Low 3/10
Typical price
$5 – $50
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Updated Jun 12, 2026 Seen on Powertrain
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ℹ️ What does it mean?
EVAP Emission Control System Leak Detected (Fuel Cap Loose/Off)
🔍 Symptoms
- • Check Engine Light on
- • Reduced engine performance
- • Increased fuel consumption
- • Unusual engine behavior
⚠️ Possible Causes
- ⚠ Loose fuel cap
- ⚠ Damaged gas cap seal
- ⚠ Missing gas cap
🚗 Can I drive with this code?
Safe to drive
Generally safe to drive. Fix at your convenience.
🔧 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 Tighten gas cap
- 2 Replace gas cap seal
- 3 Replace gas cap
💰 Estimated Repair Cost
Repair cost by car / region
Early rough estimate. Accuracy improves as more real repair stories are added.
DIY / parts$2 – $33
Mechanic / labor$2 – $38
Repair range$5 – $50
❓ FAQ
What does P0457 mean?
EVAP Emission Control System Leak Detected (Fuel Cap Loose/Off)
How serious is P0457?
Severity: low. Generally safe to drive. Fix at your convenience.
How much does it cost to fix P0457?
Estimated repair cost: $5–$50 depending on vehicle and region.
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