What Does P2400 Mean?
The PCM has detected an open circuit or electrical problem in the EVAP leak detection pump control circuit. The pump is unable to be commanded on/off properly to perform leak testing.
Common Causes
40%
Failed leak detection pump motor or internal circuit
30%
Open or damaged wiring between PCM and leak detection pump
20%
Corroded or loose connector at leak detection pump
10%
Blown fuse or failed relay in pump power circuit
Diagnostic Steps
1
Step 1: Locate leak detection pump (typically near fuel tank or engine bay) and inspect connector for corrosion or damage
2
Step 2: Check fuses and relays related to EVAP system and leak detection pump
3
Step 3: Disconnect pump connector and check for voltage at power supply wire with key on (should have battery voltage)
4
Step 4: Check continuity in control circuit wiring between PCM and pump connector
5
Step 5: Test pump operation by applying battery voltage directly to pump terminals
Estimated Repair Cost
$200 - $600
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or electrical problem in the EVAP leak detection pump control circuit. The pump is unable to be commanded on/off properly to perform leak testing.
The most common cause of P2400 (Evaporative Emission System Leak Detection Pump Control Circuit/Open) is: Failed leak detection pump motor or internal circuit
Typical repair costs for P2400 range from $200 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
No immediate safety concern. Vehicle is safe to drive but will fail emissions testing and may have reduced fuel economy.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2400 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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