DTC P0442 — EVAP Emission Control System Leak Detected (Small Leak)
P0442 indicates: EVAP Emission Control System Leak Detected (Small Leak).
Diagnostic summary
P0442
What it means
EVAP Emission Control System Leak Detected (Small Leak)
Can you drive?
✅ Safe to drive
Urgency
Low 3/10
Typical price
$20 – $300
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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 (Small Leak)
🔍 Symptoms
- • Check Engine Light on
- • Reduced engine performance
- • Increased fuel consumption
- • Unusual engine behavior
⚠️ Possible Causes
- ⚠ Loose gas cap
- ⚠ Cracked EVAP hose
- ⚠ Faulty purge valve
- ⚠ Filler neck issue
🚗 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 or replace gas cap
- 2 Replace EVAP hose
- 3 Replace purge valve
💰 Estimated Repair Cost
Repair cost by car / region
Early rough estimate. Accuracy improves as more real repair stories are added.
DIY / parts$7 – $195
Mechanic / labor$9 – $225
Repair range$20 – $300
❓ FAQ
What does P0442 mean?
EVAP Emission Control System Leak Detected (Small Leak)
How serious is P0442?
Severity: low. Generally safe to drive. Fix at your convenience.
How much does it cost to fix P0442?
Estimated repair cost: $20–$300 depending on vehicle and region.
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