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2003 OLDS. MINI VAN V6: P0403 CODE! REPLACED THE EGR VALVE AND THE COOLANT TEMP. SENSOR,THEN CLEARED THE CODE. START ENGINE, LIGHT OFF, ROAD TEST FOR 5 MILES NO LIGHT. STOPED ENGINE FOR 30 MIN. RESTART ENGING SERVICE LIGHT ON!

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6ya6ya
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Posted on Jan 02, 2017

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keemo68
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SOURCE: Oldsmobile Alero EGR valve bad

yes you can do it yourself the egr valve is located on the exaust manifold closest to the fire wall unfortunately it has to be replace. it has an electronic lead to it and is vaccum operated to replace it is not a difficult task. the part can be purchased at a Napa or Oreilly's for alot less than at a dealership. just make sure your gasket surfaces are clean for replacement of new gaskets. if you have a code reader than can reset the code that is a benefit however if you do not you have to have a scan tool to reset the code. please rate the solution....thanks

Posted on Sep 19, 2008

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SOURCE: 99 olds alero 2.4

I'm sure you have installed a fuel pressure gauge and monitored the fuel pressure while the problem is occurring?Another diagnostic tool which is easy to do,is while the problem is occurring,unplug one sensor at a time beginning with the Mass Air Flow first,.if it uses one.Many times,not always,depending on the sensor,if the sensor is taken out of the picture as far as what the PCM is seeing,like unplugging the MAF,the PCM will substitute the missing sensor output with a generic value that will allow the engine to at least run,and if unplugging for example the MAF,the engine idle speed returns to normal,you know you're onto the problem.You didn't mention if the engine ran ok other than the idle problem.As far as checking for vacuum leaks,i use something like brake cleaner or WD 40,more of a liquid,and it does sound like a vacuum leak.Plastic intake manifolds do develop nearly invisible cracks that open up more with heat.Revsisit the possibility.And as for the PCM,it is possible,but more likely a mechanical problem.Lastly,remove an O2 sensor or two before the catalytic convertor,run the engine and see if anything changes.Cheap way to verify the catalytic convertor is flowing and not restricting engine airflow,as i have seen bad cats cause misfire codes and strange problems.Good luck.

Posted on Dec 04, 2008

cbcs2008
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SOURCE: 1996 lincoln town car p0403 code

Yess bad EGR valve

Posted on Jan 19, 2009

  • 1 Answer

SOURCE: 2001 ford winstar van v6 eng wont start do to anti theft system is on how i turn it off

2001 widnstar won't do anything. Won't start, can't shift

Posted on May 26, 2009

  • 1 Answer

SOURCE: 2001 Oldsmobile Alero overheating

I have an 02 olds alero (142000) the radiator fans are not working, therefore overheating. I have replaced the thermostat, water pump, coolant, what causes the fans not to work?

Posted on Mar 09, 2010

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1 Answer

What is the 1987 pontiac fiero gt v6 check engine light code list?


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