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Cadillac 2003 Reduce engine power

We have Cadillac 2003 and the message indicate reduce engine power, we scanned by tech 2 and indicates Throttle actuator control performace, we replaced the parts and the problem still exist.

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When you replace the throttle actuator, you need to calibrate the part with a proper diagnostic tool

Posted on Jun 02, 2009

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I have a 2003 Cadillac cts getting codes p1795 p1780 p1779 p2176 what can be possible problems to fix them?


code p 2176 refers to throttle actuator control(TAC) system--idle position not learned ===causes basic setting not carried out
code p 1795 is CAN bus--throttle body position
code p 1780 is park/neutral position (PNP) switch circuit engine torque signal circuit
code p 1779 is engine torque delivered to TCM signal
go google and type in cadillac fault codes and find a site that has all the codes listed

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Sometimes my reduce engine power comes on I lose power if I turn the truck off for 15 seconds it goes off and runs good


How many miles does it have on the odometer ? The reduce engine power has to do with the ETC electronic throttle control . May have TPS - throttle position sensor problem or the APP sensor . 04 Silverado REDUCED ENGINE POWER Case Study Part 1

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Reduce power light on has no throttle and keeps giving throttle accuator cdes


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Reduced Engine Power Message Displayed on GM Vehicles

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Dec 10, 2012 - Tech Tip: Reduced Engine Power Message Displayed on GM Vehicles ... Model year 2008-'10 vehicles must have the engine control module (ECM) reprogrammed ... Do not drop the electronic throttle control components.

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1 Answer

I have a 2003 Cadillac CTS. It continues to go into reduced power mode. How do I correct that.


Are you getting a ENGINE POWER REDUCED message ? Is the check engine light on ?
Reduced Engine Power Mode
Throttle Actuator Control (TAC) System
electronic throttle control .
When the ECM detects a condition with the TAC system the ECM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
?€¢
Limited torque


?€¢
Limited range of throttle movement


?€¢
Engine OFF


Your going to need to take this to a ASE certified repair shop or the dealer , you probably don't have the diagnostic tools to trouble shoot this problem.
https://youtu.be/oPPLAHSSluw

Aug 16, 2015 | Cadillac Cars & Trucks

1 Answer

My 2006 Buick lacrosse reduce power light came on today--what does that mean


Reduced Engine Power
Refer to Throttle Actuator Control (TAC) System Description in Engine Controls - 3.6L or Throttle Actuator Control (TAC) System Description in Engine Controls - 3.8L
TAC System Default Actions/Reduce Power Modes
There are 2 reduce power modes that the engine control module (ECM) can default to if an error is detected in the throttle actuator control (TAC) system. If an accelerator pedal position (APP) sensor 1 or APP sensor 2 circuit fault, throttle position (TP) sensor 2 circuit fault, or if a TP sensor 1 circuit fault is detected with some APP angle, the ECM goes into one of the 2 reduce power modes. In this mode, the engine torque is limited so that the vehicle cannot reach speeds of more than 100 km/h (60 mph). The ECM remains in this reduce power mode during the entire ignition cycle even if the fault is corrected.
If there is a condition with the throttle actuator control circuits, throttle actuator command vs actual position fault, return spring check fault, or a TP sensor 1 circuit fault, the ECM goes into the other reduce engine power mode. In this mode, the engine speed is limited to 2,500 RPM and the 3-6 fuel injectors are randomly turned OFF. At this time the Reduced Power indicator is commanded ON. The ECM remains in the reduce power mode during the entire ignition cycle even if the fault is corrected. Observe, if a TP sensor 1 or throttle actuator control circuit fault is present at the time the vehicle is at idle, with no accelerator pedal angle, the engine may stall.

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have it scanned usually this is a problem with the throttle actuator

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My car is a satan vue, and my check liight is on saying reduce power


This issue, most of the time, is related to the wireless throttle control modules on the engine and on the accelerator pedal inside the car. This condition is not a fix or repair for the average person and will require a scan tool and diagnostic procedures that beyond the scope for self repair. Have the vehicle scanned for a diagnostic code related to the reduced power indication, and proceed from there. I wish I had a simple solution for you.

Jun 23, 2011 | Saturn Vue Cars & Trucks

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The engine light comes on and a message saying engine power reduced. have to turn off ignition and restart truck. getting really bad.


Your going to have to get the Sierra scanned for the DTC code to why it's setting the ECM to reduce the power. Auto Zone or Parts Source will scan free of charge so you can address the issue. There are a few things that will set the reduce engine power like a faulty throttle peddle position ECT. Keep me posted, be glad to help you get your Sierra running 100% again soon.

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Check engine light "reduced enging power" message?


hook it up to OBD 2 scan retrieve fault code and go from that point!

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