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This DTC says nothing about changing the sensor or the connector or pig tail ! It's a circuit voltage low code P0405 - DPF EGR Sensor Circuit Low Voltage Detected
See DTC P1400
Problem with wiring or PCM ! P1400 - DPF EGR Sensor Circuit Low Voltage Detected
The EGR monitor checks the DPF EGR sensor signal to the PCM for low voltage. The test fails when the average voltage to the PCM drops to a voltage less than the minimum calibrated value.
DPFEGR circuit short to GND
Damaged DPF EGR sensor
VREF short to GND
A DPF EGR PID reading less than 0.2 volt with the key ON and engine OFF or running, indicates a hard fault.
EGR position sensor high. This means when the EGR valve is turned on the PCM engine module sees the sensor as not reading. check the conector for being disconnected. check for a pushed out terminal in the connecter, or terminal in sensor. if they are ok then the sensor is bad.
EGR POSITION SENSOR CIRCUIT HIGH. Possidle Causes: (K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO (F857) 5-VOLT SUPPLY CIRCUIT. (K34) EGR POSITION SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE. (K34) EGR POSITION SENSOR SIGNAL CIRCUIT OPEN. SENSOR GROUND CIRCUIT OPEN. EGR SOLENOID ASSEMBLY. PCM.
EGR position senser. It's just as likly to have a wire problem or stopped up exhaust line to the valve as it may have a bad senser. Check everything for you go buying parts because the senser is expensive and it doesn't fail often but the connections and the pipe being stopped up happen all the time.
Check in the drivers side rear of engine take off the air housing and use 13mm. deep
socket w / 3inch ext. and air ratchet to remove 2 bolts, then take tire
off inner splash panel then 8mm wobble w / 24inch ext to take 1 tube bolts
loosen other one and pull out as ***. Reverse to install.
Hope this help to solve it (remember rated this post).
P406 is a EGR code, EGR will also cause a knocking/ pinging sound when there bad. Very common problem. The position sensor inside the valve goes bad. Your going to have to replace the whole EGR valve and it can put out variety of codes from P0401 to P0406. The new valve will solve the problem and easy to replace, you can pick one up at Auto Zone and they can give you the step by step instructions to replacing the EGR with common tools. Good luck and hope this helps.
A misfire on # 8 Cylinder which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. There are other possible, less obvious causes as well. Fuel injectors, related wiring, sensors and computer issues Running out of gas, or poor fuel quality Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine Incorrect Fuel Pressure EGR system concerns: leaking EGR valve or restricted ports Base engine concerns: low compression, valve train problems and timing issues Ignition system concerns including, but not limited to: Faulty spark plugs Faulty coil or related wiriing I would get the Dyno tuned and see what the computer is reading 35 and 45 MPH. or you could check with your local dodge dealer to see if there was a recall or update on the Computer if there was or is any issues. Good luck and hope this helps, Old School was so much easier.