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2008 toyota hiace efi fuse affiliated with egr error

2008 hiace engine light keeps coming on and the error code relates to ther EGR air flow. When I pull the main efi fuse (located in front of engine) the engine light comes off and does not come back on and the vehicle still runs well. 1. what could go wrong? 2. How does it work without the fuse?

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  • Cars & Trucks Master
  • 12,223 Answers

The sensor can be faulty, test it with VOM see the diagram attached from toyota
God bless you2008 toyota hiace efi fuse affiliated with egr err - 723f0c61-cb22-4f50-ae14-17f480160a6a.jpg5b2ea860-030d-4ae6-9a75-adfb1d28a808.jpg

Posted on Jul 20, 2013

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Posted on Jan 02, 2017

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  • 14 Answers

SOURCE: Check engine light keeps coming on with a PO403

take battery cable off to let computer reset

Posted on Jun 11, 2010

  • 1024 Answers

SOURCE: insufficient air flow

there's a solenoid under the intake manifold which has vacuum hose connects to egr valve. this solenoid is having a lot of problem.

Posted on May 27, 2010

MNfisherman
  • 11896 Answers

SOURCE: check engine light keep coming on after repairs

With these computers, anytime your check engine light comes on and than you replace the part, the computer has to be reset with handheld scanner/computer.
So even with a new part, the computer still has to be electronically reset.
Even if there are no codes. You won't have codes because the part is new, but the engine light will remain on until it is reset.

If you have all new parts, no codes, and had the system reset. It could be a problem with the computer itself and will have to be put on a diagnostic computer for further testing.

Posted on May 11, 2009

Mustgo
  • 2359 Answers

SOURCE: Can't fix the EGR excessive flow code

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.


Take it for a test drive.


Please rate my answer if it's useful to you.


Cheers,

Mustgo

Posted on Dec 19, 2009

  • 1 Answer

SOURCE: Code P0401 EGR Insufficient Air flow detected - 2000 Toyota camry

how I change the EGR valve assist switch for toyota camry 2000

Posted on Aug 19, 2010

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00 Camry 2.2 egr problem po 401 low flow new egr valve new solenoid new transducer new map clean passages. I don't know what else to do


Here is an overview for the code as it relates to Toyota cars.
I would go back and make sure the tubes and pipes are clear.
In most cases, the passage is plugged up, or the sensor does not "see" the flow.

Possible causes
- 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


Read more: http://engine-codes.com/p0401

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Ford EGR valve

The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. Read more how the EGR system works below. What could cause the code P0401 - clogged or restricted EGR passages
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1 Answer

Insufficient air flow The EGR valve has been changed twice, but the engine light (401 code, EGR) stills come on what else could this be?


there's a solenoid under the intake manifold which has vacuum hose connects to egr valve. this solenoid is having a lot of problem.

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Per Auto Zone, the EGR value needs to be replaced (check engine light is on). Where is the value located and should I try to remove it and clean it? Is there any other items suspect for replacement with...


The EGR valve is located on the intake manifold, it has a single vacuum line going to it, are you sure it is the valve and not the vacuum control valve that opens and closes the EGR? You provided no year or trouble code, so hope this answer is correct.

Pull the EFI fuse for 5 minutes to clear the check engine light thumb_up.gif

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