OBD II Fault Code

  • OBD II P046F

OBD-II Code Decreased engine performance is defined as a Exhaust Gas Recirculation Sensor "B" Circuit Intermittent/Erratic

EGR (Exhaust Gas Recirculation) systems are used to reduce the combustion temperature, thus reducing emissions. If the engine control module (PCM) does not detect the amount of flow requested from the EGR, it will set code P046F.

Decreased engine performance Symptoms

  • Decreased engine performance
  • Increased fuel consumption

Common Problems That Trigger the P046F Code

  • EGR valve failure
  • Powertrain Control Module (PCM) failure
  • Wiring issue

Common Repairs Needed for the P046F Code

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