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2003 Lincoln LS code P1406

Help! I'm having trouble figuring out what code P1406 means. Something to do with the "Evap system"?

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On your LS.
The CODE P1406,
IS Mean: Differential Pressure Feedback egr. problem.

Ok.. Is just the definition for your code.
The DPFEGR.. is a Little BOX. Black Colour.

Is Normally connected to the EGR tube coming from the EXUAST MANIFOLD. with 2 small hoses.
Inspect the Hoses for broken, burn or stuck with carbon.
if you DON'T found nothing wrong.
Replace the DPFEGR. You van get from DEALER.
DON'T get from autoparts because they only offer one
UNIVERSAL. and most cases don't work right.

Ok.. I hope this help to try to fix your car.
Thank you for use fixya..

Posted on Aug 09, 2008

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Codes1406 and 1441 coming up what can it be

Four digit codes are brand specific.
Code 1406 is for a problem with the EGR sensor, and code 1441 is for the EVAP system having flow when it should be off.

Jan 22, 2014 | 1997 Pontiac Trans Sport

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I have 1998 Nissan 200sx,I have trouble the code is 'P1492' what is the causing this?

That c

That code has something to do with you EVAP system. It could be that there is a wire disconnected or correded which would normally be called a open/closed circuit. Other problem causes could be that your EVAP canister control solenoid valve or the EVAP canister itself are bad and they need to be replace.

Jan 22, 2013 | 1998 Nissan Maxima

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P0700 code p0455

Trouble Code: P0455

EVAP Large Leak Detected

Possible Causes:

EVAP purge solenoid is damaged or it has failed.Fuel tank cap is damaged, missing or the wrong part number.NVLD switch is damaged or it has failed.Trouble Code: P0700

Automatic Transmission Control System Malfunction

Possible Causes:

The presence of this code means the TCM detected a problem.TCM related Sensor has solenoid is damaged or has failed.This code is for information only - check for other TCM codes.TCM or PCM has failed.Now it's time to turn into Einstein and figure this out.Good luck.

Jan 14, 2013 | 2000 Dodge Grand Caravan

1 Answer

Check engine light on Toyota sienna 2000 stays on

have an auto parts store scan the computer for you.
They most often do this for free (oreilly auto parts and autozone)

Write down the code they give you. Should start with "P" (po442, P1406, etc)

That will be the problem, and they will most likely offer you the part right there.

Toyota is big about EVAP system trouble codes (chech engine lights)

But it could be anything, so this should be an easy fix.

You can even ask them at the parts store where the trouble part is located.

let me know once you find the problem code and I can help more.


Dec 10, 2012 | 2000 Toyota Sienna

1 Answer

Trouble code P0455... gas cap is not an issue

Large evap system leak. must inspect evap system for cut, loose or unplugged hoses, leaking valves or lines. If any of this is greek to you, take it to a shop. you'll just be wasting your own time trying to figure it out without prior knowledge of this critical system. if anyone has worked on the car recently check in that area for something left disconnected or damaged. Good luck!

Sep 05, 2011 | 2006 Nissan Altima

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

2 Answers

P0446 code on a 2004 ford expedition 5.4

P0446 - Evaporative Emission Control System Vent Control Circuit Malfunction

Evap vent valve has only one purpose. It closes in order to seal the vent so the EVAP system can pressurize and ensure there are no leaks. Evap vent valve is usually supplied Batt. voltage with key on. The ECM's driver controls the ground, and when grounded, activates the valve (closing it). If the ECM detects a short to ground, and open,or a short to battery voltage on the control circuit, P0446 will set. Code also may refer to ECM detecting that EVAP system is unable to achieve or maintain vacuum during test.

Symptoms: There will be no obvious symptoms to driver, other than MIL illumination.

Causes: A code P0446 could mean one or more of the following has happened:
* Faulty vent valve
* Open, short or excessive resistance on Vent valve control circuit
* Blockage of vent valve
* Bad PCM

Possible Solutions: With a P0446 OBD-II trouble code, here are some things to try:
* Replace Vent valve
* Repair open, short, or resistance problem in control circuit
* Repair open, or short, or resistance problem in power circuit
* Replace PCM

I hope help with this (remember to rate and comment this).

Oct 02, 2010 | 2004 Ford Expedition

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...


Jul 09, 2010 | 2002 Chevrolet Silverado 1500

2 Answers

Location of sensor for troubleshooting po442 to cause check engine light to come on

P0442 OBD-II Trouble Code - Evaporative Emission Control System Leak Detected (small leak)

What does that mean?
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

You likely won't notice any drivability problems.

A code P0442 most likely means one or more of the following has happened:
* A loose or improperly affixed gas cap
* A non-conforming gas cap (i.e. not factory/original brand)
* A small leak/hole in a fuel vapor hose/tube
* Other small leak in EVAP system
* Faulty vent o-ring seal

Possible Solutions
With a P0442, the most common repair is to:
* Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
* Otherwise, replace the gas cap, or
* Inspect the EVAP system for cuts/holes in tubes/hoses


Fig. EVAP vent solenoid (2) on 3.1L, 3.4L, 3.5L & 3.8L, showing the connector (1) and vapor line (2)


Fig. EVAP canister purge solenoid location on 3.1L & 3.4L


Fig. EVAP purge solenoid valve (3) location on 3.5L

Hope this help, good luck.

May 11, 2010 | 2002 Buick Century

3 Answers

What is code P0455- Emissions leak

well you can have o'reillys use the scan tool to clear codes in the computer and the light will go out unless the problem still exists then it will come back on. this code means that maybe something is wrong in the evap system. i have a question for youl. when you get gas do you stop when filling up and the pump kicks off the first time or do you kepp filling a little more each time trying to top it off better. what many people do not know is that you can do this but it is filling the lines of the evap system with gasoline which will eventually cause problems with the system. the evap controls fuel vapors from the gas tank and it can not work if it is full of gas. i am sure you understand gasoline turns to vapor quickly. gas in your gas tank does too. to keep it under control the evap system gathers it and purges it with switches and sensors that can be damaged by liquid gas. so can vacuum lines. they will swell and leak and all of these will cause the system to fail and the computer will set a code and the light comes on. also the gas cap being lose while the engine is running will do the same.if that is the problem you will need a skilled tech to figure out what is wrong and replace it. if your getting gas always stop the first time the pump kicks off. hope this helps and good luck

May 10, 2010 | 2005 Chevrolet Suburban

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