Question about 2009 Cadillac CTS

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Overheating CTS overheated & now says reduced engine power & the ck engine light is on

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6ya6ya
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Posted on Jan 02, 2017

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keemo68
  • 1263 Answers

SOURCE: 1990cad deville overheating

the first thing to check is to have the engine running. as soon as it reaches operating temp the upper radiator hose should get hot. if it doesn't then it's the thermostat. if it does then i believe your water pump is probably not circulating like it should and it should be replaced. however before replacing the wter pump make sure that the wire to sending unit is tight and not giving you a false reading. if your model has electric fans make sure the fans are running when the engine is hot. if they are not running check the relay in the fuse box for the fans with the engine running switch out the fan relay with the a/c clutch relay. ifthe fans kick on replay the relay with a new one. if they don't click on the it's either a bad wire or the temp sensor probe is bad. hope this answers your question. please rate this solution...thanks.

Posted on Aug 30, 2008

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davealphabb
  • 27 Answers

SOURCE: Cadillac CTS overheating while sitting still

Hi,It sounds as though the radiator is blocked.the heater might be opening letting in hot air which will over ride the cool air.

Posted on May 24, 2013

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1 Answer

Reduced engine power on cadillac cts


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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 ?
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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:
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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

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Dec 14, 2010 | 2002 Chevrolet TrailBlazer

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Reduced power light on, 2000 Isuzu Rodeo, can't go anywhere


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