P0406 Mitsubishi Code - Exhaust Gas Recirculation Position Sensor Circuit High
Quick Answer
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. Common causes include Faulty EGR volume control solenoid valve, Carbon built up on EGR valve, EGR volume control solenoid valve harness is open or shorted. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0406 Mitsubishi indicates Exhaust Gas Recirculation Position Sensor Circuit High.
- Common causes
- Common causes include Faulty EGR volume control solenoid valve, Carbon built up on EGR valve, EGR volume control solenoid valve harness is open or shorted.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0406 Mitsubishi Description
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.
What are the Possible Causes of the DTC P0406 Mitsubishi?
- 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
How to Fix the DTC P0406 Mitsubishi?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0406 Mitsubishi code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0406 Mitsubishi Code
What does the OBDII code P0406 mean on a Mitsubishi?
P0406 indicates a high voltage signal from the Exhaust Gas Recirculation (EGR) position sensor circuit, which suggests an issue with the EGR system.
What are the common symptoms of the P0406 code in a Mitsubishi?
Symptoms include reduced engine performance, rough idling, increased emissions, and the Check Engine Light being illuminated.
What causes the P0406 code to appear in a Mitsubishi vehicle?
Common causes include a faulty EGR valve position sensor, wiring issues such as shorts or damaged connectors, or carbon buildup in the EGR valve.
Can I drive my Mitsubishi with the P0406 code active?
While it may be possible to drive, it is not recommended as the vehicle may experience reduced performance and higher emissions, potentially causing further damage.
How can I diagnose the P0406 code on a Mitsubishi?
Diagnose the issue by inspecting the EGR valve, checking the position sensor and connectors for damage, and testing the circuit for proper voltage.
What repairs are commonly needed to fix the P0406 code in a Mitsubishi?
Repairs may include replacing the EGR valve or position sensor, cleaning the EGR valve, or repairing damaged wiring or connectors.
How can I prevent the P0406 code from recurring?
Regularly clean the EGR valve to prevent carbon buildup, and ensure wiring and connectors are in good condition during routine maintenance.
What tools do I need to troubleshoot the P0406 code?
You’ll typically need an OBDII scanner, a multimeter for testing electrical circuits, and tools to remove and inspect the EGR valve.
Is the P0406 code specific to Mitsubishi vehicles?
No, the P0406 code applies to all vehicles with OBDII systems, but the symptoms and fixes may vary slightly depending on the make and model.
How much does it cost to repair the P0406 code on a Mitsubishi?
Repair costs can range from $100 to $400 depending on whether you're cleaning, repairing, or replacing the EGR valve or sensor.
Discuss the causes and fixes for P0406 Mitsubishi OBDII Code
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