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
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 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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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 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
Quick Tip-Throttle Cleaning - EricTheCarGuy
This one goes out to BowlingBallOut who posted a question about a sticky
throttle on his Saturn. It was a great question so I decided to make this
video in response to it. There are many different configurations of
throttle assemblies but for the most part if you have a throttle that is
sticking you might be able to fix it using the procedures in this video. I
am aware you may not able to purchase spray throttle cleaner in some states
now but I'm sure they have some alternative available at your local parts
One very important note here is that if you have a drive by wire throttle
(DBW), then I do NOT recommend this procedure. If you perform this
procedure on a DBW throttle body you may need to have the throttle reset in
order to get your engine to idle or even start. I only recommend this
procedure if you're trying to correct a problem with a sticking throttle.
If you have idle problems, I recommend you check out this article on my
The best place for answers to your automotive questions:
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Due to factors beyond the control of EricTheCarGuy, it cannot guarantee
against unauthorized modifications of this information, or improper use of
this information. EricTheCarGuy assumes no liability for property damage
or injury incurred as a result of any of the information contained in this
video. EricTheCarGuy recommends safe practices when working with power
tools, automotive lifts, lifting tools, jack stands, electrical equipment,
blunt instruments, chemicals, lubricants, or any other tools or equipment
seen or implied in this video. Due to factors beyond the control of
EricTheCarGuy, no information contained in this video shall create any
express or implied warranty or guarantee of any particular result. Any
injury, damage or loss that may result from improper use of these tools,
equipment, or the information contained in this video is the sole
responsibility of the user and not EricTheCarGuy.
Fixing EGR Low Flow Code P0401
Scotty Kilmer, mechanic for the last 43 years, shows how you can fix your
car if it has low EGR flow and the check engine light is on with code P0401
stores. Visit Scottykilmer.com for answers to all your car questions.
Valvoline EGR Cleaner
Valvoline EGR + turbo Cleaner is a blend
of selected solvents, carefully formulated to remove deposits on EGR valve
and turbo systems. It quickly removes
gum, varnish,carbon and dirt.
* Cleans EGR valves and turbo chargers
* Leaves no residue
* Restores engine performance
For more information see:
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.
Dumb Things NOT To Do To Your Car
Scotty Kilmer, mechanic for the last 43 years, shows some of the dumb
things he's seen people do to their cars. Visit Scottykilmer.com for
answers to all your car questions.
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.
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: