Question about 2000 Cadillac DeVille

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What could cause my 2000 cadillac deville to run 2600rpm at 65mph...no error lights on/or codes

I just noticed going down the hyw that my car seemed to me to be at a high rpm for the speed i was traveling...so i pulled it down into 3rd and it did shift...i put it back in overdrive and it shift back but rpm still seemed high

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  • 104 Answers

You may have a torque converter not locking. At low engine load conditions at hwy speeds to save gas the engine computer will tell the trans to lock the converter which results in lower rpm. Either the TCC solenoid is not locking the converter, or the PCM has failed and not sending signal to the TCC solenoid. If this has been going on over a week, im willing to bet the PCM has failed, otherwise a good one should catch the TCC if its not working and should throw a code.

Its my best guess with no tools to know for sure. Good luck :)

Posted on Jun 14, 2014

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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nyspeter86
  • 81 Answers

SOURCE: E49 code on cadillac deville 1990

Dante,

(Quote) I looked up code E49 and there is no such code.


The above quote is from my colleague named “txkjun”. With all due respect to him and his “Guru” status he is wrong. The code “E49” does exist, and it is an “AIR management system error".

At this time I would like to apologize for typing a word that didn’t belong in my response.

You see, when I said the code “E-49” “DOES NOT” exist I was responding to the answer that: “Txkjun” gave you.

I meant to say that the code “DOES” exist, but I simply typed in the word “NOT” by accident.

I'll get back to you with repair procedures in a few hours.

Thank You.
Peter.

Posted on Jan 01, 2009

  • 7 Answers

SOURCE: Cadillac Deville 2000- Engine check light code P0741

If you like go ahead and let someone sell and replace your transmission but here is my suggestion! Check around and see if you can find a minor vacuum leak! This can simply be the big round hose that goes from the fuel injection to the power brake hub! This is normally a push in connector which has about a 1/2 inch hose clamped on it! If there is any kink or the connector is not in correctly a leak will occur and the transmission will shift rough as though you will be thrown out of the vehicle! Try unplugging this connector and plug it back in hard and straight and maybe you will be lucky and fix your problem. If the vacuum is correct your transmission will shift better than you have ever experienced!

Posted on Aug 16, 2009

  • 416 Answers

SOURCE: 2000 cadillac deville the service engine soon

need to have system checked to get trouble code

Posted on Jan 21, 2010

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SOURCE: INCREASED ENGINE RPM'S ON MY 99 CADILLAC DEVILLE

throttle position sensor. or idle control sensor

Posted on Mar 26, 2010

honeymokey
  • 3113 Answers

SOURCE: I have a 1990 cadillac sedan deville with a E98 code

Sounds like the engine is idling to high. There is a procedure that you must go through to set it. Reply and I will let you know how to set it.

Posted on Apr 06, 2010

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1 Answer

How to fix P0335 and P0727 error codes for Cadillac Catera 2000?


P0335 is a code for a faulty crank angle sensor. When this sensor starts going bad, usually the car will not start till it cools down, may cause rough running or no start at all. P0727 is a communication error between the engine control module and the transmission control module. Check for any bad connections between both modules.

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2000 cadillac deville not shifting into overdrive/ no codes


Shift B solenoid faulty. If replacing one then I suggest replacing shift A solenoid as well. They're located in the lower vavle body of tranny. Hope this helped.

May 13, 2014 | 2000 Cadillac DeVille

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2001 Cadillac Deville will not move forward or reverse. Started as a problem that would clear up after it warmed up. Problem progressed (a few days later) to very hard to get in moving forward from a...


Sounds like a failing pump in the transmission or a torque converter problem. Check for any error codes (DTCs) using a code checker to see what is setting the warning. Next stop is probably a transmission shop.

Jul 29, 2017 | 2000 Cadillac DeVille

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Service air bag light is on 2000 cadillac deville dhs. what are the possible reasons.


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Sep 05, 2011 | 2000 Cadillac DeVille

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2000 cad deville has error code of PO101 , replaced MAS but service engine light is still on , how do I re set it ?


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Jan 21, 2011 | 2000 Cadillac DeVille

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My cadillac deville has the following engine codes when hooed up: P0106, P0121, P0171, P0174, P0335, P0340, P0385, P0442, P0506, P0506, P0507, P0601.


click on the below links for code details.
P0106

P0121

P0171

P0174


P0335


P0340

P0385

P0442

P0506

P0507

P0601.

all of the above codes seem to have a common cause, they all list a bad ecm (computer) as being a cause, and the last code P0601 points specifically to a bad computer. sorry for the bad news, hope this helps.

Dec 06, 2009 | 2000 Cadillac DeVille

2 Answers

Cadillac Deville 2000- Engine check light code P0741


If you like go ahead and let someone sell and replace your transmission but here is my suggestion! Check around and see if you can find a minor vacuum leak! This can simply be the big round hose that goes from the fuel injection to the power brake hub! This is normally a push in connector which has about a 1/2 inch hose clamped on it! If there is any kink or the connector is not in correctly a leak will occur and the transmission will shift rough as though you will be thrown out of the vehicle! Try unplugging this connector and plug it back in hard and straight and maybe you will be lucky and fix your problem. If the vacuum is correct your transmission will shift better than you have ever experienced!

Aug 16, 2009 | 2000 Cadillac DeVille

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