Engine-Codes - Ford - P0402 FORD

P0402 FORD Code - Exhaust Gas Recirculation Flow Excessive Detected

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

|P0402 FORD code possible causes

  • EGR volume control valve stuck open
  • Faulty EGR volume control valve
  • EGR solenoid valve harness is open or shorted
  • EGR solenoid valve circuit poor electrical connection
  • Faulty EGR temperature sensor and circuit

|How is the P0402 FORD code repair?

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.

|P0402 FORD code tech notes

There is a factory service bulletin for the following Ford models:

2000-2002 Ford Taurus
2001-2002 Ford Crown Victoria
2001-2002 Ford Focus
2001-2002 Ford Mustang
2001 Ford Explorer USPS
2001-2002 Ford E Series
2001-2002 Ford Escape
2001-2002 Ford Expedition
2001-2002 Ford Explorer Sport Trac
2001-2002 Ford Explorer Sport
2001-2002 Ford F-150
2001-2002 Ford Ranger
2001-2002 Ford Windstar
2002-2003 Ford Explorer
Ford Factory Service Bulletin OBDII Code P0402 Code





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|What is the cost to diagnose the P0402 FORD code

Labor: 1.0

The cost to diagnose the P0402 FORD 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 P0402 FORD code detected?

High Exhaust Gas Recirculation (EGR) flow control is detected

|What are P0402 FORD code possible symptoms?

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

|What is P0402 FORD code meaning?

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.

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