The EGR system on recently built vehicles uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECΜ. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECΜ does not issue the pulse signal. Α certain voltage signal is issued so that the valve remains at that particular opening." property="og:description">
For Shop Owners

P0406 DODGE - Exhaust Gas Recirculation Position Sensor Circuit High

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty EGR volume control solenoid valve
  • Carbon built up on EGR valve
  • EGR volume control solenoid valve harness is open or shorted
  • EGR volume control solenoid valve circuit poor electrical connection
  • Faulty EGR temperature sensor and circuit
What does this mean?

Tech notes

Dodge, Chrysler 3.3 EGR valve replacement codes P0404 and P0406





User submitted video

P0406 Dodge EGR, Diagnosis, Testing, Cause and Fix





User submitted video
What does this mean?

When is the code detected?

An improper voltage signal is sent to ECM through the valve

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine hesitation

P0406 DODGE Description

Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator. Depending on the engine and driving conditions, the ECΜ will control the EGR Solenoid which will operate the EGR Vacuum Μodulator to regulate the opening and closing of the EGR Valve.

The EGR system on recently built vehicles uses a step motor to control the flow rate of EGR from exhaust manifold. This motor has four winding phases. It operates according to the output pulse signal of the ECΜ. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECΜ does not issue the pulse signal. Α certain voltage signal is issued so that the valve remains at that particular opening.

OBDII Code P0406 Dodge - Exhaust Gas Recirculation Position Sensor Circuit High - itimaster.ru

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P0406 DODGE Comments

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Any information is appreciated. Thanks
Repair Importance Level: 2
1=Low 2=Medium 3=High
Repair Difficulty Level: 2
1=Easy 2=Moderate 3=Hard

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