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'94 BUICK CENTURY 3.1 .. COMPUTER & CODE

'94 BUICK CENTURY 3.1 .. COMPUTER & CODE SCANNER DISPLAY "P1403" ='s EGR VALVE STICKING .. WHAT JUST I DO ?

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It has a digatal egr valve remove the egr valve and lean it with top engine cleaner from GM, with a tooth brush, then test the stepper motor with an ohm meter if it mesures more than 6 ohms replace it.

Posted on Jun 21, 2009

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Posted on Jan 02, 2017

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A a breakdown p1403


What make, model an year vehicle ? P1403 could mean something different from make to make .
P1403 - DPFE Sensor Hoses Reversed
P1403 Chevrolet - Exhaust Gas Recirculation System Valve 1
P1403 Hyundai - DMTL Valve Circuit
P1403 Volkswagen - EGR System Control Difference

Dec 19, 2015 | Cars & Trucks

1 Answer

My 94 buick has a had a rough idle lately and it i let it get around a quarter tank it will stall out randomly when i am driving? any idea?


possible bad crankshaft sensor, possible egr valve ports in intake passages plugged up with carbon, check for vacuum leak

Sep 03, 2012 | 1994 Buick Century

1 Answer

Service engien soon light on a 1999 buick century code 401pd


If the DTC is P0401 it means that the EGR Valve is clogged or air flow is insufficient.Take EGR valve off and clean carbon out or replace EGR valve with a new one.

Oct 28, 2011 | 1999 Buick Century

1 Answer

1998 Buick Century Custom 3.1--service engine soon light is on, I check the computer and it says EGR insufficiant flow code P90401. I changed the egr valve lite still on. Went back to Autozone checked...


well I'm a mechanic and you just told me what's wrong....
now all you have to do to fix it is test all parts listed replace the one (s) that fail test....

May 14, 2017 | Buick Century Cars & Trucks

1 Answer

Buick 2001 century check has the code p1404. is it safe to drive the car until we can have it fixed?


Hello Momma.
This code has set because a fault was detected in the exhaust gas recirculation system (EGR).
If your car is running normally, no chugging or rough running, it isn't a serious issue. But you should have it looked at to determine why it set.
Often it's because the pin inside the EGR valve is sticking or carboned.
If this valve sticks it can allow exhaust gas into the intake when it should not be and cause your engine to stumble at idle or low speeds.
It will not damage anything over a short period of time.

Thank you for using FixYa.
Best of the season to you.

KL

Dec 26, 2010 | 2001 Buick Century

1 Answer

1996 buick century, I had a tune up and egr valve


Have an auto parts store check for the code. It is possible that you have a bad O2 sensor or your catalytic converter is clogged.

Apr 10, 2010 | 1996 Buick Century

1 Answer

HOW TO CLEAN '94 BUICK CENTURY 3.1 EGR VALVE ..I BOUGHT THE CAR WITH 40,000 MILES (12/2006) .. IT'S 06/20/2009 WITH UNDER 62,000 MILES .. ABOUT 3 MONTHS AGO MY PROBLEM BEGAN .. THE PROBLEM IS A STRONGE...


to properly clean and test the egr valve you should remove it from the car. disconnect vacuum, elect connectors, and check the gasket surface both on the manifold and on the base of the valve. you will need to buy or cut a new gasket most likely. when you apply vacuum to the control inlet, you should see the valve lift away from the seat. I use brake cleaner and compressed air to spray clean and blow out the valve just to test it and then go from there depending on what you find ---- one of the vacuum switches that controls it or a faulty vacuum line is a likely possibility also ---- so you should check them also. a vacuum pistol comes on really helpful here.

Jun 20, 2009 | 1994 Buick Century

1 Answer

94 buick stalls and hesitates


check fuel pump pressure.it should be 41 to 47 psi.

Apr 26, 2009 | 1994 Buick Century

1 Answer

Need buick century egr diagram


If your car runs bad with an EGR code then I would suggest that the EGR valve be replaced. I would like to know what code was set on your computer. It would help greatly. When the EGR malfunctions, you will have rough idle and possible stalling. If you have a code indicating EGR it may also condem the cat converter.Please show any codes that are set. Thanks Moe

Apr 24, 2009 | 2000 Buick Century

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