P0406 2006 Nissan Maxima Code - Exhaust Gas Recirculation Temperature Sensor Circuit High Input
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 2006 Nissan Maxima indicates Exhaust Gas Recirculation Temperature Sensor Circuit High Input.
- 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 2006 Nissan Maxima 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 2006 Nissan Maxima?
- 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 2006 Nissan Maxima?
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 2006 Nissan Maxima 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 2006 Nissan Maxima Code
1. What does the P0406 code mean for a 2006 Nissan Maxima?
The P0406 code indicates a high input signal from the Exhaust Gas Recirculation (EGR) temperature sensor circuit, suggesting a problem with the sensor or its circuit.
2. What are the symptoms of the P0406 code in a Nissan Maxima?
Common symptoms include the Check Engine Light turning on, reduced engine performance, rough idling, and increased emissions.
3. What causes the P0406 code to appear?
Possible causes include a faulty EGR temperature sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning EGR valve.
4. How do I diagnose the P0406 code in my 2006 Maxima?
Use an OBDII scanner to confirm the code, inspect the EGR temperature sensor and wiring for damage, and test the sensor’s voltage with a multimeter to ensure it’s within the expected range.
5. Can I drive my Nissan Maxima with the P0406 code?
Driving with this code is possible but not recommended, as it may cause poor fuel efficiency, increased emissions, and long-term damage to the EGR system.
6. How do I fix the P0406 code on a 2006 Nissan Maxima?
Repairs may involve replacing the EGR temperature sensor, cleaning or replacing the EGR valve, or repairing damaged wiring or connectors in the circuit.
7. How much does it cost to repair the P0406 code?
Repair costs vary but typically range from $100 to $300, depending on whether the EGR sensor, valve, or wiring needs replacement.
8. Will clearing the code with an OBDII scanner fix the P0406 issue?
Clearing the code may temporarily turn off the Check Engine Light, but it won’t fix the underlying problem causing the code.
9. What tools do I need to fix the P0406 code on my Nissan Maxima?
You’ll need an OBDII scanner, a multimeter to test voltage, and basic tools for inspecting and replacing the EGR sensor or valve.
10. Is the P0406 code related to emissions testing?
Yes, the P0406 code can cause your vehicle to fail emissions testing due to improper EGR system function and increased exhaust emissions.
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