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Old 09-19-2013, 07:30 PM   #1
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egr valve pintle position circuit

My SES light came on and I got it checked. The code was p1406 which is "the egr pintle position was 10% of the expected position" the guy at auto zone was saying it is likely a short or pinch in the circuit and to check the wires from the egr to the computer (because I just replaced the egr valve around the start of the summer)

My questions:
Is it possible that the egr valve is already clogged and a cleaning would fix it?

I know very little about auto electronics and electronics in general so can anyone give me info on how to check the connection and find/fix my problem in the wiring? Thanks guys!
96 firebird 3.8
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Old 09-19-2013, 07:48 PM   #2
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There is an EGR pintle relearn procedure you can do.
I don't remember the exact steps.
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Old 09-19-2013, 08:04 PM   #3
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I dont know about the procedure, though Im sure Navy is right. I do know that there is a separate code for a clog in the EGR system. I forget what it is but I know I have it.
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Old 09-19-2013, 10:28 PM   #4
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Quote:
Originally Posted by purple94 View Post
I dont know about the procedure, though Im sure Navy is right. I do know that there is a separate code for a clog in the EGR system. I forget what it is but I know I have it.
So that means cleaning it prolly wont help. Dang. That means I have to learn things D:
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Old 09-21-2013, 03:07 PM   #5
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The light turned off and the car isn't giving me problems.. Ok?
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Old 09-21-2013, 05:02 PM   #6
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Quote:
Originally Posted by raytyj View Post
The light turned off and the car isn't giving me problems.. Ok?
Sounds like it reset itself.
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96 T/A, Black/Graphite Leather, T-Tops, 6 speed, 10 speaker Delco/Bose "Monsoon"
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Total engine rebuild at 187,020 miles.
AIR delete. Bored .030 over.
Comp cams Xtreme Energy LT1 266HR-14 street cam and springs..
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Old 09-21-2013, 06:51 PM   #7
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Cool! Side note: im going code reader shopping tonight. I dont know much about them other than they are for sale for a wide range of prices. Can anyone tell me a good code reader that I can grow into and what features are useful to have in one?
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Old 09-21-2013, 07:19 PM   #8
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You want one you can update via a USB cable and that can also clear codes.
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Comp cams Xtreme Energy LT1 266HR-14 street cam and springs..
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Old 09-21-2013, 08:11 PM   #9
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http://www.harborfreight.com/can-obd...ool-60694.html

This is the one that I have. Its easy to use and plenty of nice features. I didn't pay that much though. I might have a 20% off coupon code though.
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Old 09-21-2013, 11:07 PM   #10
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http://www.amazon.com/gp/aw/d/B003IOITRG I spoke with one of the guys at AutoZone and im thinking about getting this. Gonna look at Ebay and craigslist.
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Old 04-24-2014, 12:16 AM   #11
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i have the same code popping up for my 97 3.8 Camaro RS does anybody know how to fix this problem code is
P1406 id light to get the service engine soon light off
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Old 04-24-2014, 12:48 AM   #12
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egr valve pintle position circuit

P1406 Chevrolet

P1406 Chevrolet - EGR Valve Pintle Position Circuit

Possible causes
- Faulty Exhaust Gas Recirculation (EGR) valve
- Carbon blockage of the pintle
What does this mean?
Tech notes
The P1406 code means that the EGR valve is 10% of the expected position by the Powertrain Control Module (PCM), usually caused by carbon built up n the EGR valve. Start by cleaning the EGR valve.
What does this mean?
When is the code detected?
The EGR pintle position was 10% of the expected position.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1406 Chevrolet Description
The Powertrain Control Module (PCM) determines that the EGR valve is stuck open if the actual Exhaust Gas Recirculation (EGR) position and the learned closed EGR position vary by more than a predetermined value. The PCM tests for a stuck valve when the desired EGR position is at 0%. The PCM commands the EGR valve to 100% during certain driving conditions in order to clear a possible restriction from the EGR valve if the PCM determines that the valve is stuck open.how to clean the EGR valve for a p1406 code:
Things You'll Need

Socket wrench
Carburetor cleaner
Small bowl
Wire brush
Pick
Rag

Step 1

Park the car and allow the vehicle ample time to cool off, about a half hour.

Step 2

Open the hood of the vehicle and locate the EGR valve. You can find the EGR on GM models on the intake manifold. Location may vary slightly from model to model, so it's best to refer to your repair manual. The valve looks like a mushroom top component with a hose and electrical connector coming off it.

Step 3

Pull the vacuum hose gently from the valve to remove it. Squeeze the sides of the electrical connector and pull the connector straight off. Place both components to the side to ensure they do not get damaged during the removal process.

Step 4

Use a socket wrench to loosen and remove the two bolts securing the valve to the mount. Turn the wrench counterclockwise until you remove both bolts. You can now remove the loose valve. Lift the valve straight off the mount using some force.

Step 5

Place the EGR valve in a small bowl with about an inch of carburetor cleaner. Make sure only the bottom part of the valve is soaked. Leave the valve overnight to allow the cleaner to penetrate the carbon.

Step 6

Use a wire brush, small pick and a rag to clean the valve. Be careful not to damage it. Push open the valve and clean any carbon debris or build up. The valve should now move freely. Allow the valve to air dry completely.

Step 7

Reinstall the valve. Align the valve on the mount so the holes on the valve match the holes on the mount. Insert the two bolts and tighten using the socket wrench. Plug the vacuum hose back into the valve. Reconnect the electrical connector, then push it into place until you hear it click secured.

Function

An idle relearn procedure is a way to reprogram the vehicle's computer memory to idle at a specified RPM, or revolutions per minute. Without the programmed idle, the vehicle can run arbitrarily, resulting in unnecessary engine wear.

Features

Chevy uses a simple idle relearn process. After you replace the computer chip, it will automatically reset itself when you turn the ignition key from the "on" position to the "off" position. Blue Streak Electronics recommends to warm the engine after the idle relearn procedure, without use of the air conditioner. After the engine is warm, switch the air conditioning on and off, and then put the transmission into the "drive" position. These actions complete the full idle relearn procedure.

Considerations

It is imperative that a technician verifies that the car's battery is fully charged. If power fails during a relearn procedure, the technician must reprogram the computer chip.

http://www.bsecorp.com/files/techtips/ST9303l.pdf
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Last edited by Ercmann; 04-24-2014 at 12:59 AM.
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