Question about Chevrolet Cars & Trucks

Open Question

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

Posted by Anonymous on

6 Suggested Answers

  • 2 Answers

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

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 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

  • 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

  • 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

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What do the OBDII trouble codes P0401 & P0404 mean with 2001 Chevy Impala?

P0401 Exhaust Gas Recirculation Flow Insufficient Detected

P0404 Exhaust Gas Recirculation Circuit Range/Performance

Feb 18, 2015 | Cars & Trucks

1 Answer

P 0406 P0406 Exhaust Gas Recirculation Sensor A Circuit High

Replace the EGR valve & check the vacuum lines for it at both ends

Dec 25, 2013 | 2006 Dodge Grand Caravan

1 Answer

Code P 0404 P403 and P 406 mean

P0404 Exhaust Gas Recirculation Circuit Range/PerformanceP0403 Exhaust Gas Recirculation Circuit Malfunction
P0406 Exhaust Gas Recirculation Sensor A Circuit High

its basically saying change your egr valve plus to make sure i would clean ur intake passages thats where the egr goes to and if the passages get gloged then the egr valve can go bad please update the situation if eny so i can help u

Feb 22, 2013 | 2005 Chrysler Pacifica

3 Answers

Ford Taurus. Check Engine Light Code P1400

P1400 Exhaust Gas Recirculation valve position sensor
P1401 Exhaust Gas Recirculation valve position sensor
P1402 Exhaust Gas Recirculation metering orifice restricted
P1403 Exhaust Gas Recirculation differential pressure sensor
P1404 EGR Temperature Sensor circuit
P1405 Exhaust Gas Recirculation Differential Pressure Feedback Sensor upstream hose off or plugged
P1406 Exhaust Gas Recirculation Differential Pressure Feedback Sensor downstream hose off or plugged
P1407 EGR solenoid -No Flow Detected
P1408 EGR solenoid -Flow out of Self- Test Range
P1409 EGR Vacuum Regulator solenoid circuit malfunction
The sensor for the EGR Valve position is not functioning correctly.

Oct 16, 2010 | 2002 Ford Taurus

1 Answer

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

Exhaust gas recirculation-insufficient flow detected
Exhaust gas recirculation-circuit malfunction
Exhaust gas recirculation vave position sensor A- circuit low

hope this helps. not sure where they are located

Aug 27, 2010 | 2004 Pontiac Grand Am

1 Answer

Code p0409? when turning ignition switch off and on.also engine light is staying on

P0409....Exhaust Gas Recirculation Sensor 'A' Circuit
Changing the EGR valve most likely will solve the problem. This website will explain it a lot better than i can. Good luck hope this helps

Mar 11, 2010 | 2005 Dodge Caravan

1 Answer

1998 Chevy Truck 1/2 ton 350 engine. Trouble codes P0404, P0405 and P1404. I replaced the EGR valve. Now I get t/c P0404 and P0405. Now what should I check?

404 is exhaust gas recirculation circuit, and 405 is exhaust gas recirculation sensor circuit low. EGR sensor or ground?

Nov 13, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Disgnostic code meaning

P0404 Exhaust Gas Recirculation Control Circuit Range/Performance
P0405 Exhaust Gas Recirculation Sensor “A” Circuit Low

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

Sep 28, 2008 | 2000 Chevrolet Tahoe

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

69 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8202 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides