P043E OBD II Trouble Code Evaporative Emission System Leak Detection Reference Orifice Low Flow

How to quickly diagnose, repair, and what causes of a P043E code that indicates an evap leak reference orifice with low flow.

Symptoms of P043E OBD II Trouble Code

  • Defective EVAP pressure sensor
  • A damaged or clogged EVAP leak detection orifice
  • Charcoal element (canister) ruptured
  • Cracked or crushed EVAP or vacuum line/s
  • Faulty vent control or purge control solenoid
  • Bad leak detection pump

Common Causes of P043E OBD II Trouble Code

  • A loose or failed fuel cap will not cause a code P043E to be stored
  • This code is applicable only to vehicle EVAP systems which utilize a leak detection system

Severity of P043E OBD II Trouble Code

EVAP leak detection codes, similar to the P043E, deal exclusively with the evaporative emission control system and should not be classified as severe.