P0406 2000 Ford F150 Code - Exhaust Gas Recirculation Sensor 'A' 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 2000 Ford F150 indicates Exhaust Gas Recirculation Sensor 'A' 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 2000 Ford F150 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 2000 Ford F150?
- 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 2000 Ford F150?
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 2000 Ford F150 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 2000 Ford F150 Code
1. What does the P0406 code mean on a 2000 Ford F150?
The P0406 code indicates that the Exhaust Gas Recirculation (EGR) Sensor 'A' circuit is reporting a voltage higher than expected to the engine control module (ECM).
2. What are the common symptoms of the P0406 code in a 2000 Ford F150?
Symptoms may include poor engine performance, rough idling, decreased fuel efficiency, and the Check Engine Light being illuminated.
3. What causes the P0406 code to appear?
Common causes include a faulty EGR position sensor, damaged wiring or connectors in the EGR circuit, or a malfunctioning EGR valve.
4. Can I drive my 2000 Ford F150 with a P0406 code?
While the vehicle might still be drivable, driving with this code can lead to reduced performance and potentially cause more damage to the engine or emissions system.
5. How do I diagnose the P0406 code on a 2000 Ford F150?
Diagnosis involves inspecting the EGR position sensor, checking the wiring and connectors for damage, and using a multimeter to test the sensor's voltage output.
6. How do I fix a P0406 code on a 2000 Ford F150?
Repairs may include replacing the EGR position sensor, repairing damaged wiring or connectors, or cleaning or replacing the EGR valve if it’s clogged or faulty.
7. How much does it cost to repair a P0406 code on a 2000 Ford F150?
The cost depends on the specific repair, but replacing the EGR position sensor typically ranges from $150 to $300, including parts and labor.
8. Can a clogged EGR valve cause the P0406 code?
Yes, a clogged or stuck EGR valve can disrupt the sensor readings and trigger the P0406 code.
9. Does clearing the P0406 code with an OBDII scanner fix the problem?
Clearing the code may turn off the Check Engine Light temporarily, but the underlying issue must be resolved to prevent the code from returning.
10. How can I prevent the P0406 code from occurring again?
Regular maintenance, such as cleaning the EGR valve and inspecting the sensor and wiring, can help prevent the code from recurring.
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