HAD this Code(Pintle Stuck Open), Took the EGR Valve Off, Pintle was working Fine, But Cleaned it anyways, Gun-Barreled Brushed the Tubes, New Gasket, and The "Service Engine Soon" Light came back On...Took car Over and Steam-Cleaned the Engine, Service Light didn't come Back on, On Start-Up(right after Washing Engine) and is still Off...But Still get the P 1404 DTS Code..I asked The Guys at the Parts House to Clear the Code, But They said They couldn't Legally do That...So Did My Car RESET itself(figured this was the Case since The Service Light didn't come back on), or is The EGR still Faulty??
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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.
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.
Keep in mind that the EGR valve relies on inputs from other sensors to
determine the pintle position. If one of these other sensors is not
operating correctly, it could be giving you a false P1406 error code.
The Powertrain Control Module (PCM) monitors the Exhaust Gas Recirculation (EGR) valve pintle position input to ensure that the valve responds properly to commands from the PCM. When the ignition switch is turned ON, the PCM learns the EGR learned minimum position. The PCM compares the EGR learned minimum position to the EGR position sensor when the EGR valve is commanded closed. If the EGR position sensor indicates that the EGR valve is still open when the PCM is commanding the EGR valve closed, this DTC will set.
A scan tool that is capable of commanding the EGR circuits on and off is required to verify EGR performance and sensor feedback voltages at the PCM. However, this code is USUALLY caused by carbon getting stuck in the EGR pintle and holding it open. A good cleaning is usually all that is required to fix this.
You will need an EGR gasket. Remove the EGR valve and inspect the ports for heavy carbon deposits. These deposits can usually be cleaned out using screwdrivers and a piece of mechanics wire to break the carbon loose and some carb and choke cleaner to finish the clean-up. A wire brush and some carb cleaner usually works for the EGR valve itself. Once the ports and the valve are clean, re-install the valve using the new gasket. Clear the codes and drive the vehicle to see if the problem is fixed. Please note that the EGR monitor runs at speeds over 50 Mph. during deceleration, so you need to get the vehicle on the highway for a valid test of the EGR system.
If the Check Engine light does not come on during the road test, Connect a code reader and check the OBD readiness monitors. If the EGR monitor says "complete" and there are no codes in the computer, then you have done a successful repair.
EGR Valve Closed pintle Position This valve is located on the intake manifold near the carb (behind I think) It looks like a flying saucer on its side with a six sided raised portion and a vacuum line going into it. If you push on the valvediaphragm (side opposite the raised portion I mentioned earlier) it should move in and out without too much effort. Be sure the engine is cold to prevent burns. If the valve is stuck - replace it. There also may be a filter in on a bracket near the valve if your vehicle is equiped with an electronic VRV (Vaccum Regulator Valve) Hope this helps. Let me know. Thanks
sounds like you have the 4.3L VIN W Eighth digit of your VIN number These are prone for 2 problems the most liklely you have a carbon build up on your throttle plate and IAC motor pintle end,This can be cleaned with throttle body cleaner availble at your local autoparts store.Use a old toothbrush to clean the sides and back of throttle plate and bore,pull your IAC motor and clean the pintle and seat,second thing these are known for is carbon chunks getting stuck in your EGR valve and it holds the pintle open,Remove your EGR and see it the pintle is stuck open sometimes this is better left to a professional because it can be diffacult to remove EGR.
The code P1404. The especification is:
EGR ( exhaust gas recilculation) Closed Valve Pintle error.
Check the condition of the EGR valve.
Check the connector for damaged pins. corroded or broken.
Remove the EGR Valve and see the PIntle, some times is there a piece of carbon making obstruction on the hole of the EGR.
Clean and install, Clear the code and Drive to see if the code return,
If the code return Replace the EGR valve,
If not, You done...
I hope this help on your question....
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