What Does P1445 Mean?
The EVAP system is detecting fuel vapor flow during non-purge conditions specifically in Chevrolet vehicles. This indicates unwanted vapor movement when the purge valve should be sealed.
Common Causes
45%
Purge solenoid valve stuck open or leaking internally
25%
Cracked or disconnected EVAP hoses allowing air intrusion
15%
Faulty vent valve not sealing properly during test
10%
Damaged EVAP canister with internal bypass
5%
Fuel tank pressure sensor reading inaccurately
Diagnostic Steps
1
Step 1: Visually inspect all EVAP system hoses and connections for cracks, damage, or disconnection
2
Step 2: Use scan tool to monitor fuel tank pressure during non-purge conditions (engine idling)
3
Step 3: Command purge valve closed and verify it doesn't pass air by applying vacuum and checking for leaks
4
Step 4: Perform EVAP smoke test to identify vapor path leaks in system
5
Step 5: Test vent valve operation and verify proper sealing when commanded closed
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
The EVAP system is detecting fuel vapor flow during non-purge conditions specifically in Chevrolet vehicles. This indicates unwanted vapor movement when the purge valve should be sealed.
The most common cause of P1445 (Evaporative Emission (EVAP) System Flow During Non-Purge Chevrolet Only) is: Purge solenoid valve stuck open or leaking internally
Typical repair costs for P1445 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may fail emissions inspection. Possible fuel vapor odor and increased hydrocarbon emissions into atmosphere.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1445 to identify the root cause.
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Quick Info
Category
Powertrain
System
Evaporative Emissions System
Difficulty
Type
Manufacturer
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