What Does P1452 Mean?
The PCM has detected abnormally high voltage on the EVAP switching solenoid control circuit. This suggests an open circuit, short to voltage, or loss of ground that prevents the solenoid from being properly controlled.
Common Causes
35%
Open ground circuit or poor ground connection for switching solenoid
30%
Wiring harness short to voltage (battery or ignition power)
20%
Failed switching solenoid with open internal circuit
15%
PCM driver circuit failure causing improper voltage output
Diagnostic Steps
1
Step 1: Check voltage at solenoid control wire with key on, engine off (should read 0V when not commanded)
2
Step 2: Verify ground circuit continuity from solenoid to chassis or PCM ground
3
Step 3: Disconnect solenoid and measure voltage at control wire during commanded activation
4
Step 4: Inspect wiring for damage or contact with voltage sources along entire harness length
5
Step 5: Test solenoid operation by applying direct power and ground to verify function
Estimated Repair Cost
$100 - $550
Parts + labor, varies by vehicle and location
The PCM has detected abnormally high voltage on the EVAP switching solenoid control circuit. This suggests an open circuit, short to voltage, or loss of ground that prevents the solenoid from being properly controlled.
The most common cause of P1452 (Diagnostic Module Tank Leakage (DM-TL) Switching Solenoid Control Circuit Signal High) is: Open ground circuit or poor ground connection for switching solenoid
Typical repair costs for P1452 range from $100 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive with no operational concerns. Only impacts emissions system monitoring capability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1452 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Manufacturer
Recommended Tools
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