Question

I have the engine code P0406, what is the meaning on my 2005 Chrysler 300C 5.7L?

Answer 1

Hi there,

This code is referring to the EGR position sensor. There can be several different causes for this code:

When Monitored 
With the ignition on. Battery voltage is greater than 10 volts .

Set Condition 
EGR position sensor signal is greater than 4.89 . One trip Fault.

Possible Causes 

• (K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO (F856) 5-VOLT SUPPLY CIRCUIT
• (K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
• (K34) EGR POSITION SENSOR SIGNAL CIRCUIT OPEN
• (K900) SENSOR GROUND CIRCUIT OPEN
• EGR SOLENOID ASSEMBLY
• PCM

Answer 2

P0406 CHRYSLER - Exhaust Gas Recirculation Position Sensor Circuit High

Read more: https://www.autocodes.com/p0406_chrysler.html