What Does P2418 Mean?
The PCM has detected an open circuit or no control signal in the EVAP switching valve control circuit. The valve is not responding to commanded operation.
Common Causes
35%
Broken or disconnected wiring between PCM and EVAP switching valve
30%
Failed EVAP switching valve solenoid with open coil
20%
Corroded or damaged connector terminals at switching valve
10%
Blown fuse or failed relay in EVAP control circuit
5%
PCM driver circuit failure
Diagnostic Steps
1
Step 1: Locate EVAP switching valve and inspect connector for damage, corrosion, or looseness
2
Step 2: Check voltage at valve connector with key on - should see battery voltage on power supply pin
3
Step 3: Measure resistance of switching valve solenoid (typically 20-40 ohms) - infinite resistance indicates open coil
4
Step 4: Back-probe control wire and command valve on/off while monitoring for ground signal from PCM
5
Step 5: Check fuses and relays related to EVAP system per wiring diagram
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or no control signal in the EVAP switching valve control circuit. The valve is not responding to commanded operation.
The most common cause of P2418 (Evaporative Emission System Switching Valve Control Circuit/Open) is: Broken or disconnected wiring between PCM and EVAP switching valve
Typical repair costs for P2418 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive. May experience slightly reduced fuel economy and will not pass emissions testing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2418 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
