Question about 1995 Chevrolet S-10 CA Edition

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EGR p1406 again still not clearing the dash light and code

I just had my '96 S-10 pick-up scanned and I had a "not ready" for the egr, oxegen, and catalist. 2 out of 3 on a '96 will pass. How would I solve these errors or at least the cheapest one. (friday the 13th!)
Numerous times after each part change and clearing the code, it shows back up.
Russ then I changed the converter, down stream o2 sensor, and the EGR valve. And still the light returns with the p1406

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Dam i hate gremlins, try swaping out the o2 at the mainafold n check the muffler for blockage. Are you running to rich do you know?

Posted on Feb 26, 2009

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P1406 position circuit pintle


Yes an EGR will cause a vehicle to not start. That code means EGR is not working properly and That the pintle is stuck in the open or closed position. The EGR burns the unburned fuel that wasnt burned the first time by passing it through the engine again instead of raw fuel out the tailpipe.

Jan 01, 2014 | 1997 Chevrolet Astro

1 Answer

Error code p1406


P1406 code indicates a problem with the EGR valve's pintle position. The EGR Valve's pintle could just be stuck in which case the problem could be fixed by cleaning the EGR valve.
use code scan tool to clear the fault code with cheap and easy,
which one get,depend on your car's model and year.http://www.chinasinoy.com

Jun 04, 2012 | Oldsmobile Cutlass Ciera Cars & Trucks

1 Answer

Diagnostic code p1441 and p1406 fir 96 camaro WHATS THAT MEAN


Here's the description for the DTC P1406: The PCM monitors the EGR valve pintle position input to ensure that the valve responds properly to commands from the PCM and to detect a malfunction if the pintle position sensor and control circuits are open or shorted. If the PCM detects a pintle position signal voltage outside the normal range of the pintle position sensor, or a signal voltage that is not within a tolerance considered acceptable for proper EGR system operation, the PCM will set DTC P1406.

That means there is possibly a problem within the EGR valve itself, or a wiring/connector related to the EGR valve. Having a scan tool to command the EGR valve and watch the data would be extremely helpful in diagnosing this code.

Here's the description for DTC P1441:
The EVAP vacuum switch is a normally closed switch positioned in the purge line between the canister and the EVAP purge valve. The EVAP vacuum switch will open when vacuum increases to greater than 5 inches of water (in H2O) in the purge line. The PCM monitors the EVAP vacuum switch signal to determine if the evaporative emission control system is working properly. If the switch is open (purge flow detected) when the PCM is not commanding the EVAP purge valve ON, DTC P1441 will be set.

Again, this code would be best diagnosed with a scan tool that can command the purge valve and allow you to watch the data related to it. Check your vacuum lines and electrical connections to the purge vacuum switch. If the vacuum switch is unplugged this code can set.

Aug 05, 2011 | Chevrolet Camaro Cars & Trucks

1 Answer

Went to have my 97 skylark smoged and was was told my check engine light was not working. Tech said it has something to do with code p1406. Any suggestions?


Code p1406 is an EGR code but that has nothing to do with the light not working. Some one has probably taken the bulb out instead of fixing the EGR valve problem. You could just have a bad EGR valve or the ports under the EGR valve could be plugged with carbon . You need to remove the EGR valve to pinpoint the exhaust gas curcuit problem.

May 08, 2011 | 1997 Buick Skylark

1 Answer

Trouble code P1406 Failed EGR value, Open or short circuit condition Also code P0301 misfire cylinder 1 Next steps? Information for replacing EGR value? 1997 Bonneville SE 105K


P1406 Code - EGR Valve Pintle Position Circuit
The PCM monitors the EGR valve pintle position input to ensure that the valve responds properly to commands from the PCM and to detect a malfunction if the pintle position sensor and control circuits are open or shorted. If the PCM detects a pintle position signal voltage outside the normal range of the pintle position sensor, or a signal voltage that is not within a tolerance considered acceptable for proper EGR system operation, the PCM will set DTC P1406.

CONDITIONS FOR SETTING THE DTC

Ignition 1 voltage is greater than 10 volts.
EGR Feedback is less than 0.14 volt at any time.

OR

EGR Feedback is 0.4 volt greater or less than the EGR Closed Valve Pintle Position when the Desired EGR Position is commanded to 0%.

OR

Actual EGR Position is 20% greater or less than the Desired EGR Position.
Any of the above conditions are present for longer than 20 seconds.

ACTION TAKEN WHEN THE DTC SETS

The PCM will illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
The PCM will store conditions which were present when the DTC set as Freeze Frame and Fail Records data.

CONDITIONS FOR CLEARING THE MIL/DTC

The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.
The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
The DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.

DIAGNOSTIC AIDS
Check for the following conditions:

Open EGR ignition filter circuit.

An open in the EGR ignition filter circuit will cause EGR Position Error to vary erratically while the EGR valve is operating. With the ignition ON, a test light should illuminate when connected between ground and the EGR ignition filter circuit at the PCM connector. If not, locate and repair the open in the EGR ignition filter circuit.

Excessive deposits on EGR valve pintle or seat.

Remove the EGR valve and check for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.

Poor connection or damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the Actual EGR position display on the scan tool while moving connectors and wiring harnesses related to the EGR valve. A change in the display will indicate the location of the malfunction.

Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set

TEST DESCRIPTION
Number(s) below refer to the step number(s) on the Diagnostic Table:

Verifies that the malfunction is present.

The PCM contains a recirculation diode which filters the EGR ignition feed for the EGR valve. The recirculation diode is connected to the ignition filter (EGR ignition feed) circuit. If the ignition filter circuit is open, Actual EGR position may be erratic when compared to Desired EGR position. An open in the EGR ignition filter circuit will cause DTC P1406 to be set after an extended period of time.
If DTC P1406 will only set under certain conditions, the malfunction may be intermittent; refer to DTC P1406 Diagnostic Aids. If an intermittent wiring problem is not present, check for a poor connection at the PCM or the EGR valve. If the connections are OK and DTC P1406 continues to set, replace the EGR valve.

This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.


------------------------------------------------------------------------------------------------------------------------------
P0301 Code - Cylinder #1 Misfire Detected
A P0301 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #1.

Symptoms may include:
the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present

Causes: A code P0301 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer

Possible Solutions:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.


Check it and keep us updated.

May 03, 2011 | 1997 Pontiac Bonneville

1 Answer

Code p1406 valve pintle position open or short circuit condition poor electrical connection egr position sensor fault failed egr valve i replaced the valve and the check light is still on


Unless you use a scan tool to clear the fault, it will not go away by itself until 40 consecutive warm up cycles have been completed without a fault. You can go to Autozone and they will clear the alarm for you. You can also clear it by disconnecting the PCM ( powertrain control module ) battery feed.

If the alarm returns after they've cleared it, the problem still exists. If the old EGR valve showed signs of excessive heat on it, check the exhaust system for blockage. The catalytic converter may be blocked.

Mar 30, 2011 | Isuzu Trooper Cars & Trucks

2 Answers

My 1997 gmc sonoma truck,it has a V6,4.3 liter V-Tec failed the MIL/Check Engine Light Test due to a Warning Lamp Failure. Due to a OBD Fault Code:P1406 manufacturer specific code


This code indicates a problem with the EGR valve's pintle position. The EGR Valve's pintle could just be stuck in which case the problem could be fixed by cleaning the EGR valve.

If the EGR valve is electronically controlled or cleaning the valve does not fix the problem, you will most likely have to replace the EGR Valve. i hope this helps

Feb 08, 2011 | GMC Sonoma Cars & Trucks

2 Answers

Engine light is on and the that comes up on the scan tool is p1406


GM Code P1406=EGR pintle position error. the EGR valve pintle may not be able to move properly due to carbon deposits. It should be cleaned if possible and rechecked.

Feb 05, 2011 | 1995 GMC Jimmy

2 Answers

Chevy pickup 350 vortex code p-1406 comes up can't find what code means in my book. i know it has something to do with manufacturer control auxiliary emissions controls. i don't know where to look for the...


DTC P1406 IS EGR VALVE PINTLE POSITION CIRCUIT MALFUNCTION CONDITIONS.POSSIBLE CAUSE EGR SOLENOID CONTROL CIRCUIT IS OPEN SHORTED TO GROUND OR TO B+ -CHECK EGR VALVE FUSE - OR THE EGR VALVE AND PCM HAS FAILED.

Jul 09, 2010 | 2002 Chevrolet Silverado 1500

1 Answer

EGR System .....Not Ready


Try running a tank of Supreme gas & a can of SEAFOAM in the gas tank. It might clear up your problem????? Go chance of it.

Feb 13, 2009 | 1996 Chevrolet S-10 Pickup

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