How to test an electronic EGR valve (GM P1406 case study)
For more on Engine Performance Diagnostics go to my website at
In this video I show another variable when it come to testing this type of
EGR valve. This video can also be used to support Sections 3 and 7 in my
How to Clean your EGR Valve
This Episode we remove the EGR valve, give it a well deserved clean, and
then refit it, to prevent it seizing up.
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Dumb Things NOT To Do To Your Car
Scotty Kilmer, mechanic for the last 46 years, shows some of the dumb
things he's seen people do to their cars. And, If you like my car help, be
sure to watch my live car talk show every Saturday morning at 10 AM CST on
YouTube. I answer your car questions LIVE there. Just check it out at
eature=c4-overview . And remember, every TUESDAY I upload a new video, so
don't miss them.
EGR Code P0401 DONT REPLACE EGR
I see it all the time. Someone gets a check engine light. To save money
they take the car to aurozone or read the codes with a code reader. The
code description is for a flow problem with the EGR. They replace EGR and
the light comes back on.
Any EGR trouble code relating to LOW FLOW or NO FLOW does not indicate a
bad EGR. The code relates to flow from the EGR to the intake. Remove EGR
and throttlebody and clean the ports with intake cleaner and a scribe or
snake. Also check for leaking gaskets or lines but usualy the system is
just CLOGGED with hard carbon. Remove clog and flow will return and your
light will not come back on.
P0401 EGR Valve Port Cleaning
This is my DIY for clearing the CEL code P0401 (EGR Insufficient Flow) on a
98 Honda Prelude.
In cars with OBD2 if the EGR valve is restricted by carbon deposits it will
detect that and throw a CEL. To get rid of that CEL you must clean out the
carbon to allow flow.
After combustion occurs within the engine it creates Exhaust. Gas from the Exhaust straight from the engine is very bad for
the air. The EGR valve recaptures that Exhaust and runs it through the combustion
process again, which lowers the temperature of the fumes (Exhaust gas) and lowers the amount of pollution
exiting into the atmosphere.
If you don't fix it you won't pass SMOG in California. You may experience
rough idling and poor acceleration.
Get your "EGR port plugs" from Honda. They will have it.
Removing the injectors are important to allow clearance to the port plugs.
When you pull out the injectors you might as well clean them since they are
Slide hammers make pulling the port plugs out easily.
Drill with a bit the size of your tap. Drilling halfway through the port
plug to should be enough distance to fully grab the port with the slide
If after you clean your ports and valve the CEL has not been cleared, you
EGR valve maybe faulty and needs to be replaced.
How To Clean The EGR Valve On A GMC Safari Vortec V6 Engine
Here is how to clean the EGR (Exhaust
gas recirculation) valve on a GMC Safari Vortec V6 engine. If your engine
started running really rough all of a sudden, your EGR valve may be stuck
open. It's easy to remove and clean up. It is a good idea to install an
EGR valve gasket with a filter in it to prevent future carbon buildup.
Here is a link to a video I made showing the gasket:
Saturn Idle problem.mov
In this video we show you how to replace an idle air control solenoid and
clean the throttle body on a 1996 Saturn. This car was having a
excessively high idle. It would stay at 1500 RPM even though your foot was
not on the gas pedal. This was caused by carbon build up around and behind
the throttle body as well as a defective idle air control solenoid.
Jonesy's Auto Club videos are for reference and entertainment only and
should not be taken as a direct step by step guides. If you attempt a
repair like the one seen in this video please use the proper safety
equipment, take your time and do the job right.
How to fix p0401 egr code on 3.1 v6
Don't go out and buy a new EGR valve for $100. Heres how to fix it
yourself. If you have the code P0401 EGR flow insufficient, just clean the
passage way. Using a wire coat hanger or piece of flexible yet strong wire
and throttle body cleaner you can clean this yourself. Afterwards make sure
to clean out your throttle body of all the crud deposits. This engine is in
my 98 Buick century, along with Chevy Malibu, Chevy Lumina, Grand Am, Grand
prix. Thanks for watching
GM EGR Flow Testing P0401
1996 Pontiac Grand Prix 3100 (All 3100 and 3400 GM engines have this
How to fix an EGR flow trouble code P0401.
P0401 EGR Insufficient flow test
Here is how to test code P0401 and the DPFE sensor. Sure, the DPFE has a
high failure rate, but do we "throw" the part at it, or do we test it to be
sure it's actually failed. AND, this is a great way to confirm the
repair to prevent a "come back"