Engine-Codes - Ford - P0401 2000 FORD F150

P0401 2000 FORD F150 Code - Exhaust Gas Recirculation Flow Insufficient Detected

- Code Popularity: 12,731 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the P0401 2000 FORD F150 Code?

  • EGR passage clogged
  • Faulty EGR Vacuum Modulator Valve
  • Faulty EGR Valve
  • Faulty EGR solenoid valve
  • EGR solenoid valve harness is open or shorted
  • EGR solenoid valve circuit poor electrical connection
  • Dead (Weak) battery
  • Faulty EGR temperature sensor and circuit
  • Exhaust gas leaks

|How to Fix the P0401 2000 FORD F150 Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|P0401 2000 FORD F150 code tech notes

The EGR system is monitored during steady state driving conditions while the EGR is commanded on. The test fails when the signal from the DPF EGR sensor indicates that EGR flow is less than the desired minimum.





User Submitted Video

|What is the cost to diagnose the P0401 2000 FORD F150 code?

Labor: 1.0

The cost to diagnose the P0401 2000 FORD F150 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0401 2000 FORD F150 code detected?

Low EGR flow control is detected

|What are P0401 2000 FORD F150 code possible symptoms?

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

|What Does the P0401 2000 FORD F150 Code Mean?

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.
Exhaust Gas Recirculation Flow Insufficient Detected

|Need more information with the P0401 2000 FORD F150 code?

Need more information on how to fix the P0401 2000 FORD F150 code?
Get Access to Factory Service Manuals

|Need help with a P0401 2000 FORD F150 code?

Get the p0401 2000 ford f150 code diagnosed by a professional: Find a repair shop in your area