EGR Vent Control Circuit/Open
The P2143 code indicates a problem in the Exhaust Gas Recirculation (EGR) vent control circuit. The Powertrain Control Module (PCM) has detected an open or short circuit in the EGR vent solenoid control circuit. This solenoid regulates the flow of exhaust gases back into the intake manifold to reduce NOx emissions. An open circuit means the electrical path is broken, preventing the solenoid from operating correctly.
01. Most Common Causes
- Faulty EGR vent solenoid
- Open or shorted wiring in the EGR vent control circuit
- Corroded or damaged connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or stalling
- Increased emissions
- Failed emissions test
- Possible poor engine performance
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for related codes.
Step 2: Visually inspect the EGR vent solenoid and its wiring for damage, corrosion, or loose connections.
Step 3: Test the EGR vent solenoid resistance with a multimeter; compare to manufacturer specs.
Step 4: Check for voltage and ground at the solenoid connector with the ignition on.
Step 5: If wiring and solenoid are good, test the PCM output; replace PCM if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but the vehicle may fail emissions and experience reduced performance. Prolonged driving could cause further issues.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts and labor. The EGR vent solenoid itself costs $50-$150, plus diagnostic and labor fees.