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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 349 (Gas - DTCS P0306 To P0455) >> P0405-EGR Position Sensor Circuit Low >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K34) EGR SIGNAL CIRCUIT SHORTED TO GROUND
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
(K34) EGR SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
(F856) 5-VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
(K34) EGR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
EXHAUST GAS RECIRCULATION (EGR) VALVE
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.  See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .