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How to Fix P2099 and P0406 Fault Codes in 2009 Dodge Journey SXT 3.5L

Model: 2009 Dodge Journey Fault Code: P0406 Posted: 2017-03-06 17:21

I own a 2009 Dodge Journey SXT with a 3.5L engine and am currently encountering two diagnostic trouble codes: P2099 and P0406. P0406 - EGR Position Sensor Circuit High Possible Causes: - (F856) 5-Volt Supply Circuit Shorted to Voltage - (K34) EGR Signal Circuit Shorted to Voltage - (K34) EGR Signal Circuit Shorted to the (F856) 5-Volt Supply Circuit - (K34) EGR Signal Circuit Open - (K900) Sensor Ground Circuit Open - EGR Valve Assembly Failure - Powertrain Control Module (PCM) Issue P2099 - Downstream Fuel Trim System 2 Rich Possible Causes: - Exhaust Leak - Fuel Delivery System Malfunction - Oxygen Sensor Wiring or Connectors Fault - Engine Mechanical Issues - Powertrain Control Module (PCM) Error

Related fault codes
P0406P2099
Comments (3)
Anonymous 2017-03-06 17:30

Start by inspecting the EGR system. For P0406 - EGR Position Sensor Circuit High, check for faults in the following components: - (F856): 5-Volt Supply Circuit — look for shorts to voltage - (K34): EGR Signal Circuit — verify if it's shorted to ground or supply - (K900): Sensor Ground Circuit — ensure proper grounding - EGR Valve assembly integrity - Powertrain Control Module (PCM) for internal faults For P2099 - Downstream Fuel Trim System 2 Rich, common causes include exhaust leaks, faulty oxygen sensor wiring/connectors, or issues in the fuel delivery system. Always verify engine mechanical health and ensure PCM is functioning correctly.

Anonymous 2017-03-06 21:08

Could you explain what (F856), (K34), and (K900) refer to in this context? Thanks for the clarification.

Anonymous 2017-03-07 07:34

Each wire connected to the EGR system is part of a specific circuit. K34 refers to the EGR signal circuit. Referencing the vehicle's wiring diagram will help identify wire colors and trace the correct path for troubleshooting. This makes it easier to locate faults in the sensor or wiring.