What Does P1443 Mean?
The EVAP system purge control solenoid or valve has a detected fault preventing proper operation. The PCM cannot properly control fuel vapor purging from the charcoal canister to the engine.
Common Causes
50%
Faulty purge control solenoid valve (electrically or mechanically failed)
25%
Open or short circuit in purge valve wiring harness
15%
Corroded or loose connector at purge solenoid
7%
Blocked vacuum line to or from purge valve
3%
PCM internal driver circuit failure
Diagnostic Steps
1
Step 1: Locate purge control solenoid and inspect connector for corrosion, damage, or loose fit
2
Step 2: Measure purge solenoid resistance (typically 20-40 ohms) and compare to specifications
3
Step 3: Check for battery voltage at solenoid connector with key on
4
Step 4: Use scan tool to command purge valve on/off and listen for audible clicking
5
Step 5: Apply vacuum to purge valve and verify it holds vacuum when commanded closed
Estimated Repair Cost
$120 - $300
Parts + labor, varies by vehicle and location
The EVAP system purge control solenoid or valve has a detected fault preventing proper operation. The PCM cannot properly control fuel vapor purging from the charcoal canister to the engine.
The most common cause of P1443 (Evaporative Emission Control System - Vacuum System - Purge Control Solenoid or Purge Control Valve fault) is: Faulty purge control solenoid valve (electrically or mechanically failed)
Typical repair costs for P1443 range from $120 to $300, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but will fail emissions testing. May experience rough idle or stalling if purge valve is stuck open, and possible fuel odor if stuck closed.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1443 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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