Question about 2006 Lincoln Navigator

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What would cause the Navigator to switch into engine fail safe mode.

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  • Lincoln Master
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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

Posted on Nov 08, 2012

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Posted on Jan 02, 2017

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SOURCE: ETC Engine Fail Mode

i am having the same prob with mine.does yous stall when it comes on?

Posted on Sep 17, 2008

pippall
  • 1486 Answers

SOURCE: My 2004 Linc Ls keeps going into this fail safe

Sounds like your mass air flow meter is at faul.Replace it.Good luck.

Posted on Sep 02, 2009

miket756
  • 2702 Answers

SOURCE: what causes the Lincoln Navigator (2005) air

coil type dont often brake but give a harder ride than air types do, an air strut is like a bike pump its full of air under presher every time you hit a bump it squashes this air to ride out the bump, if the seals blow out the air strut is finished,,, its the same thing with oil shockers

Posted on Nov 15, 2009

  • 12744 Answers

SOURCE: does the etc engine fail safe mode engage when

the engine fail safe [limp mode] engages for or when the engine/trans senses damage or something that can cause extreme damage[ no oil pressure] the limp mode is so u can safely get off road or to a service location

Posted on Feb 15, 2010

  • 1382 Answers

SOURCE: My engine light is on.

Hi,


The check engine light comes on mostly when you have bad gas tank cup,or you don't tight enough the gasoline.Go to any auto-zone and request the obd scanner,at no charge just leave your driver license or credit card,connect the scanner follow the instructions.They will check up and the check engine light will come off in the next 3 to 5 days.


Thank you !!

Posted on Jul 22, 2010

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How do you replace the ignition switch on a 2002 buick century?


What do you mean no sound when turning key ? Does the car start an run ? Or the car doesn't crank ? Ignition switch's do not work the same way they did in the old days , especially on GM vehicles . The ignition switch is an input to the BCM - body control module , the BCM processes these inputs an then energizes relays to turn things on . Also sends messages to other modules for them to turn on or energize relays .
The power mode signal may be as simple as a B+ input wired to a particular ignition switch contact. If this is also the B+ supply to the module/device, the module/device will only operate with the ignition contact closed to B+. An example of this is the starter relay when it is wired directly to the CRANK/START contact of the ignition switch. When the CRANK/START contacts are closed, the starter relay is energized and provides a current source to the starter and starter solenoid. When the ignition switch leaves the CRANK/START position, the switch contacts open and the starter relay is de-energized. This removes the current source from the starter and solenoid and the starter operation stops.
Serial Data Power Mode
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the Body Control Module (BCM). The BCM receives 4 signals/circuits from the ignition switch. These are the Ignition 0, Ignition 1, Crank and Accessory 1 ignition switch signals/circuits.
To determine the correct power mode the BCM uses:
?€¢
The state of these signals/circuits, either switch closed (B+ = 1) or switch open (open = 0)


?€¢
The sequence of switch closures received by the BCM


?€¢
The status of the engine run flag.


Important: Any ignition switch states not covered in this table indicates a DTC setting situation.
The chart indicates the modes detected and transmitted by the BCM:
Power Mode Selected/Expected
Engine Run Flag Serial Data
Sampled Ignition Signal State
Power Mode State
Accessory
Ignition 0
Ignition 1
Crank
OFF-LOCK
0
0
0
0
0
OFF
Accessory
0
1
0
0
0
ACCESSORY
RAP
0
1 to 0
0
0
0
RAP
OFF-UNLOCK
0
0
1
0
0
UNLOCK
RAP
0
1 to 0
1
0
0
RAP-UNLOCK
Run
0
1
1
1
0
RUN
Crank
0
0
1
1
1
CRANK
Crank
1
0
1
1
1
CRANK
Run
1
1
1
1
0
RUN
Fail-safe Operation
Since the operation of the vehicle systems depends on the power mode, there is a fail-safe plan in place should the BCM fail to send a power mode message. The fail-safe plan covers modules with discrete ignition signal inputs as well as those modules using exclusively serial data control of power mode.
Serial Data Messages The modules that depend exclusively on serial data messages for power modes stay in the state dictated by the last valid BCM message until they can check for the engine run flag status on the serial data circuits. If the BCM fails, the modules monitor the serial data circuit for the engine run flag serial data. If the engine run flag serial data is True, indicating that the engine is running, the modules fail-safe to "RUN". In this state the modules and their subsystems can support all operator requirements. If the engine run flag serial data is False, indicating that the engine is not running, the modules fail-safe to "OFF-AWAKE". In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
Discrete Ignition Signals Those modules that have discrete ignition signal inputs also remain in the state dictated by the last valid BCM message received on the serial data circuits. They then check the state of their discrete ignition input to determine the current valid state. If the discrete ignition input is active, B+, the modules will fail-safe to the "RUN" power mode. If the discrete ignition input is not active, open or 0 voltage, the modules will fail-safe to "OFF-AWAKE". In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
You probably won't understand any of this info. your best but would be to take it to a qualified repair shop that has proper diagnostic test equipment !

Sep 29, 2016 | Buick Cars & Trucks

2 Answers

The car error (failsafe engine mode) put coolant in and received this error. help.


the vehicle computer will go into fail safe mode when there is a problem with the vehicle. In failsafe engine mode you should go straight to a garage for repairing, usually is amajor problem

Jul 23, 2008 | Jaguar S-Type Cars & Trucks

1 Answer

I have a 2009 g envoy and when I turn my key it wont do anything.replaced the ignition switch and it has worked fine for about 5 months and now it is doing the same thing sometimes it will start right


On GM vehicles starting back in mid 2000's , maybe even before that. They started using inputs to the body control module from the ignition switch, from there the BCM controls all vehicle systems .
Power Mode Description and Operation
Serial Data Power Mode
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the body control module (BCM). The BCM uses 3 signals from the ignition switch. These are the Ignition 0, Ignition 1, and Accessory.
To determine the correct power mode the BCM uses:
?€¢
The state of these signals


?€¢
The sequence of switch closures received by the BCM


?€¢
The status of the engine run flag

The chart indicates the power modes detected and transmitted by the BCM:

Correct Ignition Switch Inputs
Ignition Key Position

Power Mode Parameter

Engine Running

Sampled Ignition Signal State

Accessory

Ignition 1

Ignition 0
OFF
Off-Awake or RAP
No
Inactive
Off
Off
UNLOCK
Unlock or RAP Unlock
No
Inactive
Off
On
ACC
Accessory
No
Active
Off
On
ON
Run
No
Active
On
On
START
Crank
No
Inactive
On
On
ON
Run
Yes
Active
On
On
Fail-safe Operation
Since the operation of the vehicle systems depends on the power mode, there is a fail-safe plan in place should the body control module (BCM) fail to send a power mode message. The fail-safe plan covers modules with discrete ignition signal inputs as well as those modules using exclusively serial data control of power mode.
Serial Data Messages The modules that depend exclusively on serial data messages for power modes stay in the state dictated by the last valid BCM message until they receive the engine status from the powertrain control module (PCM). If the BCM fails, the modules monitor the serial data circuit for the engine run flag serial data. If the engine run flag serial data is true, indicating that the engine is running, the modules fail-safe to Run. In this state the modules and their subsystems can support all operator requirements. If the engine run flag serial data is false, indicating that the engine is not running, the modules fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
Discrete Ignition Signals Those modules that have discrete ignition signal inputs also remain in the state dictated by the last valid BCM message received on the serial data circuits. They then check the state of their discrete ignition input to determine the current valid state. If the discrete ignition input is active, B+, the modules will fail-safe to the RUN power mode. If the discrete ignition input is not active, open or 0 voltage, the modules will fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
You would need a scan tool that can read data from the BCM . What may be the problem is a lose connector , these pin's at connectors are tiny and doesn't take much for one to become lose.

Jan 16, 2015 | 2009 GMC Envoy

1 Answer

Engine light is on and I have to shift the gears at a stop sign or light.


your transmission suffered an en electrical problem, and is in a fail-safe mode. you need to pull the codes to go further and get pointed in the right direction

Oct 06, 2010 | 2003 Lincoln Navigator

1 Answer

Does the etc engine fail safe mode engage when driving 20mpg or less in snow? I love 2003 lincoln LS. This question is not addressed in the owner's guide.


the engine fail safe [limp mode] engages for or when the engine/trans senses damage or something that can cause extreme damage[ no oil pressure] the limp mode is so u can safely get off road or to a service location

Feb 15, 2010 | 2003 Lincoln LS

2 Answers

What does Failsafe Engine Mode mean? my manual was stolen


Hello! Fail safe mode is when the vehicle's computer detects a serious problem an allows you to "limp" off the road or highway safely.

Fail safe mode on a Jaguar is mainly caused by a dirty and gummed up throttle body. The throttle body on your auto has a protective coating, so you can not use just any cleaner. It requires a throttle body cleaner that states "safe to use with a protective coating". The butterfly valve in the throttle body will actually "stick out". This causes fail safe mode to kick in reducing the amount of power your engine can produce.

Also check the plugs on your ECM (computer) and make sure they are all seated properly.


Guru...............saailer

Dec 13, 2009 | 1998 Jaguar XJ8L

1 Answer

Warning: fail safe engine mode


I do not know about a Jag. But the "fail safe engine mode " on my GMC means the Engine Controll Computer has quit working.

Jul 09, 2009 | 2001 Jaguar XJ8

2 Answers

Enigine fail safe mode


I encountered the same problem, my engine fail safe mode light came on and shut the car down. I took my car to my mechanic and he found the solution to the problem. The car needed a throttle body cleaning and the fuel filter needed to be replaced. After having my truck serviced my mileage increased from 14.6 mpg to 15.4 mpg
ENGINE FAILED SAFE MODE WARNING LIGHT, GONE Total cost $86.45

Dec 21, 2008 | 2006 Ford Expedition

1 Answer

2002 X5 Transmission


Sounds like you maybe having a sensor failure (engine). A computer diagnostic can be performed at the vehicle dealership to determine what caused the fail safe mode to activate.

Nov 01, 2008 | 2002 BMW 5 Series

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