P2406 — EVAP System Leak Detection Pump Sense Circuit High

What Does P2406 Mean?

P2406 is a diagnostic trouble code indicating: EVAP System Leak Detection Pump Sense Circuit High. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P2406

⚠️ Check Engine Light (MIL) illuminated
⚠️ EVAP System Leak Detection Pump Sense reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ Reduced engine performance

Common Causes

🔍 Short to voltage in EVAP System Leak Detection Pump Sense wiring harness
🔍 Corroded or water-damaged EVAP System Leak Detection Pump Sense connector
🔍 Faulty EVAP System Leak Detection Pump Sense outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P2406 mean?

P2406 indicates: EVAP System Leak Detection Pump Sense Circuit High. The vehicle's computer has detected that the EVAP System Leak Detection Pump Sense is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P2406?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P2406 for extended periods may cause additional problems.

How much does it cost to fix P2406?

Repair costs for P2406 typically range from $20 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair EVAP System Leak Detection Pump Sense wiring for short to voltage
🔧 Clean or replace corroded EVAP System Leak Detection Pump Sense connector
🔧 Replace faulty EVAP System Leak Detection Pump Sense

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P2406: EVAP System Leak Detection Pump Sense Circuit High