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Matthew Wright

On Error Codes and EGR Valves

By October 31, 2012

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One of the most common error codes thrown by your car's computer is the one telling you that you have a clogged EGR system. The Check Engine Light that kept you from getting an inspection sticker needs some attention. This may mean a new valve, or you might just need a cleaning. If money is no object, go ahead and replace the valve, and get the system's plumbing nice and clean while you're at it. But if you would rather get some more life out of the parts you already own, it's worthwhile to go ahead and give it a good going through. You might save some serious money.
November 6, 2012 at 11:54 am
(1) Louis says:

I can’t agree more. Code PO401 Insufficient EGR flow. Did both a 97 Toyota with 325 000 Kms and a 96 Honda Accord 384 000 Kms. Fairly easy work for a DIY.

November 6, 2012 at 12:29 pm
(2) Jay says:

Sometimes you may need to check to see if the vacuum line to the EGR is connected to a solenoid it may be that the solenoid is bad instead of the EGR, it may be possible that the EGR is not getting the vacuum needed to open the valve which will trigger the Check Engine Light.

1999 Ford Taurus SE
3.0L V6 DOHC

November 15, 2012 at 4:31 pm
(3) Denver Auto Repair says:

Simple enough, too bad most people will cost themselves a ridiculous amount of money by not doing it.

November 16, 2012 at 3:09 pm
(4) The Pit Shop Garage says:

Honda 3.2 and 3.0 V6 engines have problems with p0401 egr insufficient flow codes. Honda actually has a repair kit for this problem. It comes with the valve and a teflon sleeve to put inside the intake manifold. The egr passage in the upper intake manifold becames clogged. The hole actually closes completely off, and this causes the low flow code. 90 % of the time the code can be fixed by removing the upper manifold and removing the carbon from the tube. It can be done by useing a phillips screwdriver like an auger.

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