What Does P2143 Mean?
The PCM has detected an open circuit or excessive resistance in the EGR vent control solenoid circuit. This prevents proper venting of the EGR system, affecting exhaust gas recirculation control.
Common Causes
35%
Open circuit in EGR vent solenoid wiring harness
30%
Failed EGR vent solenoid with open coil winding
20%
Disconnected or severely corroded connector at vent solenoid
10%
Broken or damaged connector terminal pins
5%
PCM internal circuit failure preventing solenoid activation
Diagnostic Steps
1
Step 1: Visually inspect EGR vent solenoid connector and terminals for looseness, damage, or corrosion
2
Step 2: Disconnect vent solenoid and measure coil resistance; typically 20-80 ohms depending on manufacturer
3
Step 3: Check continuity of control circuit from PCM connector to solenoid connector
4
Step 4: Verify ground circuit integrity and check for excessive resistance
5
Step 5: Command solenoid on/off with scan tool and listen for audible clicking or measure voltage at solenoid
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or excessive resistance in the EGR vent control solenoid circuit. This prevents proper venting of the EGR system, affecting exhaust gas recirculation control.
The most common cause of P2143 (Exhaust Gas Recirculation Vent Control Circuit/Open) is: Open circuit in EGR vent solenoid wiring harness
Typical repair costs for P2143 range from $100 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 testing. Reduced engine efficiency and increased NOx emissions may occur.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2143 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control (EGR System)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
