Question about 2004 Dodge Ram

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Electronic throttle control, cruise control

When driving, the electronic throttle control light comes on and the engine bogs down, but when I let off the throttle it goes away. It does this quite often and also the cruise control does not work. I was wondering if they are related and does one have to work so the other does? Also my check engine light is on and I have checked everything under the hood and the truck runs fine other than the problem stated. Does this mean I have bad sensors in the exhast line?

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  • robprice Oct 22, 2008

    I have a 2004 Lincoln LS, during acceleration it goes into a Fail Safe mode for ETC (electronic throttle control). How can I solve this problem?

  • Anonymous Mar 13, 2014

    2008 dodge ram diesel2500four wheel drive had check engine light came on with the electronic throttle control module light checked it on a reader and it came up electronic crankshaft positioned module we replaced part now truck won't start

  • Anonymous Mar 21, 2014

    the light comes after the truck has been running about 10 min.

  • Anonymous Mar 27, 2014

    could this be a sensor or solenoid of some sort?

  • Anonymous Mar 30, 2014

    My cruise control shuts off after driving a short distance (10 Mi.) and will not re-engage. light goes off and will not come back on until I shut the engine down and re-start.

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You need to have the codes read. The electronic throttle relies on an APP sensor and a TPS sensor. A problem with either one of these will cause this. Also, the cruise would be affected by this, as there is no cruise servo, it's controlled be the electronic throttle body.

Posted on Oct 19, 2008

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Have an 03 suberban z71 today wife was driving and lost power to the pettle and overheating transmission light came on how can i fix this


Check engine light come on ? Any messages on DIC - driver information center , reduced power ,if the vehicle has it . Any other lights lite , yellow wrench symbol . Do you own a scan tool ? a professional grade scan tool , not a code reader . Do you know how to do electrical trouble shooting ? Suggest you go on you tube an check out videos on electronic throttle control .
Throttle Actuator Control (TAC) System Description
The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions:
• Accelerator pedal position sensing
• Throttle positioning to meet driver and engine demands
• Throttle position sensing
• Internal diagnostics
• Cruise control functions
• Manage TAC electrical power consumption
The TAC system components include the following:
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• The throttle actuator control module
• The powertrain control module (PCM) .I strongly suggest you take it to a ASE certified repair shop

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1 Answer

What causes cruise control to work when truck cool but will not once the truck warms up?


suggest checking cable on accelerator throttle arm in engine bay where it connects from cruise control to accelerator throttle arm on engine. Thinking if it is loose it may get looser when hot.
Check connectors on electronics in engine bay on cruise control.
Check sensor for speed. Is it ignition maybe a scotch lock connector that expands with heat and cruise control looses sensor for igition pulses. How does it sense speed ?
Is it magnets on the drive shaft maybe the Hall efect transducer is close to exhaust pipe under car and is being affected by heat.
Is it front wheel drive ? check for a pulse sender on speedo cable in engine bay maybe this is getting cold.

Check cruise control cable is oiled adequately in cable sleeve .

check vacuum connector is ok in engine bay also ?

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If the engine is bogging down or if the transmission is trying to start up in the wrong gear, either the check engine light should be on or the O/D OFF light should be flashing. The best course of action in diagnosing a problem with a computer controlled engine and transmission is to scan the computers that control them to check for fault codes.

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"EML" is BMW's system name for electronic throttle management. The "EML" system, in it's most basic sense consists of an accelerator pedal (with an electronic position sensor), a computer module (usu. integrated with the main engine computer), and an EDK (Elektronische Drosselklappe or Electronic throttle valve). The EDK is also known as a "drive by wire" throttle. "EDK" throttles use a computer controlled stepper motor rather than a purely mechanical linkage (usu. metal cable attached directly to the accelerator pedal) to control the opening and closing of the throttle plate.

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BMW first implemented "drive by wire" in very limited quantities on the most expensive & sophistocated BMW models starting in 1988.

The latest generation of advanced vehicle features to take advandage of "drive by wire" technology are radar guided cruise control, accident avoidance control, autonomous-driving, and autonomous-parking systems.


Read more: http://wiki.answers.com/Q/What_does_eml_warning_light_on_a_bmw_mean#ixzz1OnBNssKH

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Check engine light


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