Help: P0401 and P0406 ???

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Old 17 Jun 2006, 09:17 pm   #1 (permalink)
skewe
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Default Help: P0401 and P0406 ???

I have a 2000 Camry LE 2.2

Went to autozone and the CEL code came back with:
P401 and P406. This is what I found on

P0401 Exhaust Gas Recirculation Flow Insufficient Detected
P0406 Exhaust Gas Recirculation Sensor "A" Circuit High

I had P401 before and the dealer changed out the
1- vacume S valve assy
2- egr vacume valve assy

and that was like 14 months ago in Tx.
I am in FLorida now. They have 24 months warranty but works needs to be
done at their service ctr.

I might try cleaning the EGR tomorrow. Cos
http://www.autoshop101.com/forms/h61.pdf mentions that there are 3
components to a EGR system.

Any idea what P0406 means???
How do i fix it??

Thx


----
My cars:
93 camry and 2000 Camry
http://www.golfer-review.com/m_toyot...y_old_pics.htm

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Old 18 Jun 2006, 07:39 am   #2 (permalink)
skewe
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Default Re: Help: P0401 and P0406 ???

bump.. anybody?

skewe wrote:
> I have a 2000 Camry LE 2.2
>
> Went to autozone and the CEL code came back with:
> P401 and P406. This is what I found on
>
> P0401 Exhaust Gas Recirculation Flow Insufficient Detected
> P0406 Exhaust Gas Recirculation Sensor "A" Circuit High
>
> I had P401 before and the dealer changed out the
> 1- vacume S valve assy
> 2- egr vacume valve assy
>
> and that was like 14 months ago in Tx.
> I am in FLorida now. They have 24 months warranty but works needs to be
> done at their service ctr.
>
> I might try cleaning the EGR tomorrow. Cos
> http://www.autoshop101.com/forms/h61.pdf mentions that there are 3
> components to a EGR system.
>
> Any idea what P0406 means???
> How do i fix it??
>
> Thx
>
>
> ----
> My cars:
> 93 camry and 2000 Camry
> http://www.golfer-review.com/m_toyot...y_old_pics.htm


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Old 20 Jun 2006, 10:20 am   #3 (permalink)
Wayne55dud@aol.com
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Default Re: Help: P0401 and P0406 ???

Look it up:

http://autorepair.about.com/library/...l-obd-main.htm


skewe wrote:
> I have a 2000 Camry LE 2.2
>
> Went to autozone and the CEL code came back with:
> P401 and P406. This is what I found on
>
> P0401 Exhaust Gas Recirculation Flow Insufficient Detected
> P0406 Exhaust Gas Recirculation Sensor "A" Circuit High
>
> I had P401 before and the dealer changed out the
> 1- vacume S valve assy
> 2- egr vacume valve assy
>
> and that was like 14 months ago in Tx.
> I am in FLorida now. They have 24 months warranty but works needs to be
> done at their service ctr.
>
> I might try cleaning the EGR tomorrow. Cos
> http://www.autoshop101.com/forms/h61.pdf mentions that there are 3
> components to a EGR system.
>
> Any idea what P0406 means???
> How do i fix it??
>
> Thx
>
>
> ----
> My cars:
> 93 camry and 2000 Camry
> http://www.golfer-review.com/m_toyot...y_old_pics.htm


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Old 21 Jun 2006, 11:01 pm   #4 (permalink)
johngdole@hotmail.com
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Default Re: Help: P0401 and P0406 ???

First check that the EGR control ports in the throttle body is not
plugged up. The ports should pull full engine vacuum when the throttle
plate is opened past them.

Check that the EGR valve is working by pulling a vacuum on the valve.
The engine should run rough or stall. It's not likely the valve or
sensor will go bad, it's such a simple system. They usually plug up
first, if even that.

You should also check to see that the EGR pipe (from the exhaust to the
valve) isn't filled with carbon.

You might have gotten a bad EGR valve assembly.


skewe wrote:
> I have a 2000 Camry LE 2.2
>
> Went to autozone and the CEL code came back with:
> P401 and P406. This is what I found on
>
> P0401 Exhaust Gas Recirculation Flow Insufficient Detected
> P0406 Exhaust Gas Recirculation Sensor "A" Circuit High
>
> I had P401 before and the dealer changed out the
> 1- vacume S valve assy
> 2- egr vacume valve assy
>
> and that was like 14 months ago in Tx.
> I am in FLorida now. They have 24 months warranty but works needs to be
> done at their service ctr.
>
> I might try cleaning the EGR tomorrow. Cos
> http://www.autoshop101.com/forms/h61.pdf mentions that there are 3
> components to a EGR system.
>
> Any idea what P0406 means???
> How do i fix it??
>
> Thx
>


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Old 30 Jun 2006, 06:00 am   #5 (permalink)
skewe
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Default Re: Help: P0401 and P0406 ???

I cleaned out one of the egr sensors with seafoam and the light did not
come back on

i also clean the cable that came into the egr sensor..
lots of carbon in there


johngdole@hotmail.com wrote:
> First check that the EGR control ports in the throttle body is not
> plugged up. The ports should pull full engine vacuum when the throttle
> plate is opened past them.
>
> Check that the EGR valve is working by pulling a vacuum on the valve.
> The engine should run rough or stall. It's not likely the valve or
> sensor will go bad, it's such a simple system. They usually plug up
> first, if even that.
>
> You should also check to see that the EGR pipe (from the exhaust to the
> valve) isn't filled with carbon.
>
> You might have gotten a bad EGR valve assembly.
>
>
> skewe wrote:
> > I have a 2000 Camry LE 2.2
> >
> > Went to autozone and the CEL code came back with:
> > P401 and P406. This is what I found on
> >
> > P0401 Exhaust Gas Recirculation Flow Insufficient Detected
> > P0406 Exhaust Gas Recirculation Sensor "A" Circuit High
> >
> > I had P401 before and the dealer changed out the
> > 1- vacume S valve assy
> > 2- egr vacume valve assy
> >
> > and that was like 14 months ago in Tx.
> > I am in FLorida now. They have 24 months warranty but works needs to be
> > done at their service ctr.
> >
> > I might try cleaning the EGR tomorrow. Cos
> > http://www.autoshop101.com/forms/h61.pdf mentions that there are 3
> > components to a EGR system.
> >
> > Any idea what P0406 means???
> > How do i fix it??
> >
> > Thx
> >


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