P2143 Fault Code

Exhaust Gas Recirculation Vent Control Circuit/Open

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2143 fault code indicates a problem with the Exhaust Gas Recirculation (EGR) system, specifically the Vent Control Circuit. This code can be triggered when there’s an open circuit or a malfunction in the EGR vent control mechanism. The EGR system is crucial for reducing nitrogen oxide emissions by recirculating a portion of the vehicle's exhaust back into the intake manifold.

What are the symptoms of the P2143 code?

Symptoms of the P2143 fault code may include:

• Engine warning light illuminated on the dashboard.
• Rough idling or engine misfires.
• Reduced engine performance and power.
• Increased emissions output or failed emissions tests.
• Poor fuel economy.

What causes the P2143 code?

Common causes for the P2143 code include:

• Damaged or corroded wiring in the EGR vent control circuit.
• A malfunctioning EGR valve.
• Poor electrical connections or connectors.
• A failed EGR control solenoid.
• Vacuum leaks affecting the EGR system operation.

How to fix P2143?

To resolve the P2143 code, follow these steps:

• Inspect the EGR vent control circuit for any signs of damage or wear.
• Check the electrical connectors for proper connection and corrosion.
• Test the EGR valve for functionality and replace it if faulty.
• Repair any vacuum leaks within the system.
• Clear the code and conduct a test drive to ensure the problem does not recur.