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Chevy tahoe P0409 Exhaust Gas Recirculation Sensor "A" Circuit.

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

justuscc
  • 360 Answers

SOURCE: Please Help... p0404 and p0137 Error Codes (1999 Saturn SL1)

yes egr valve is a common thing on this saturn. very pricy and yes you need the rear o2 sensor good luck i have a used egr if interested off a sl2

Posted on Sep 29, 2008

  • 1 Answer

SOURCE: 2006 Dodge Grand Caravan - EGR code

I replaced the EGR Valve ($80 after tax), problem solved, vanruns great now. Now my problem is that I can't get the light to turn off.

Posted on Oct 06, 2008

m036_094
  • 107 Answers

SOURCE: Code P0404 Exhaust Gas Recirculation Control Circuit. How Do I g?

it is probably not the egr it self it is the control module plugged in to it. unless it is one which the module is built in to the egr valve. check with your auto parts supply and see if the module and egr valve can be ordered separate. I believe they are separate on a chrysler product. Mike

Posted on Jan 06, 2009

chuck943
  • 783 Answers

SOURCE: Check Engine Light On-OBD reads two codes P1405 & P0401

It is located on the right front valve cover area. It will be either black or silver and have a 3 wire connector with wire colors BN/WH,GY/RD,BN/LG. It will have 2 rubber hoses going from it and connecting to two metal tubes which run to the exhaust.

Now what sets the the P1405 is.
While driving, the EGR monitor commands the EGR valve closed and checks the differential pressure across the EGR orifice. The test fails when the signal from the DPF EGR sensor indicates EGR flow is in the negative direction. Make sure both of the hoses are hooked up and not damaged.
P0401 sets when:
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.
So the DPFE could be causing both codes.
I would also recommend that you take a hand vacuum pump and pump vacuum on the EGR while engine is running and make sure you have a drop in RPM so you know that the EGR ports are not stopped up,they are bad about this too.
As far as the rattling converters this could possibly have an effect because it does use exhaust back-pressure along with vacuum to help open the EGR but if the exhaust is still basically stock this probably won't have enough effect on the back pressure to cause this unless they have stopped up and have so much back pressure it is blowing the hoses off of the DPFE or getting so hot it melts them. You can check this with a vacuum/pressure gage, just hook it into one of the hoses from the DPFE and you should have 1 PSI at idle and 3 to 4 PSI at wide open throttle. Anything more would be a restriction.
If all of this is ok then replace the DPFE.

Posted on Apr 15, 2009

  • 120 Answers

SOURCE: i got the code P0406 Exhaust Gas Recirculation

The term EGR stands for "exhaust gas recirculation." what it does is re-route all the unburned exhaust gases in the combustion chamber to the intake manifold to get reburned. Now, that being stated, you DO NOT need EGR at idle, only driving at higher speeds. Such as freeways and high ways. IT will most certainly affect the way your engine runs. It will cause sort of a miss fire condition. The solution here, in my opinion, would be to replace the EGR Solenoid and BOTH gaskets. One should be a cork gasket and the other steel. Replace the gaskets and the EGR Solenoid, should get rid of the problem. To save some money, you can try to remove the EGR Solenoid and clean it thoroughly with brake cleaner and try to reinstall it. This may only be a temporary fix though. If it does work and the light comes on again, then you know for sure you need to replace the EGR Solenoid. good luck!

Posted on May 22, 2010

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I have 4 codes: 1- p0401 2- p0401 Pd 3- p0403 4- p0405 what do I have to do to get rid of these codes. what are these and where are they located on a 2004 grand am Thx


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It sounds like you have a failure of the EGR valve.

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