P2143 OBD II Trouble Code Exhaust Gas Recirculation Vent Control Circuit /Open

How to quickly diagnose, repair, and causes of a P2143 diagnostic code which indicates a detected open condition or general malfunction in the exhaust gas recirculation EGR vent control circuit.

Symptoms of P2143 OBD II Trouble Code

  • Decreased engine power
  • Rough engine idle
  • Poor acceleration
  • Poor fuel economy
  • CEL (check engine light) on
  • Engine misfire-like symptom

Common Causes of P2143 OBD II Trouble Code

  • Dirty/clogged EGR (exhaust gas recirculation valve)
  • EGR vent solenoid defective
  • EGR vent plugged
  • Vacuum leak
  • Kinked vacuum line
  • Connector issue
  • Wiring issue (open, corroded, chafed, short, etc.)
  • ECM issue

Severity of P2143 OBD II Trouble Code

Severity-wise, I would say this fault is moderately severe and I will tell you why. The EGR (exhaust gas recirculation) system in not a required system for the operation of the engine. That said, it does improve emissions and also helps your engine running smoothly in varying conditions so its operation is fundamental if you want your vehicle to run and function optimally. Not to mention the fact that, if left long enough the soot that goes through these systems could accumulate and cause future problems/issues. Keep your EGR maintained properly to avoid any headaches.