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P0603 CODE IN CADILLAC 1999 DEVILLE 1999

HOW I RESOLVE MY BAD FUNCTION IN MY CAR, I HAVE A P0603

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  • Cadillac Master
  • 5,955 Answers

Check all connection, battery, water damaged.

Posted on Feb 24, 2019

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: 1999 cadillac deville air wont work

There's a blower motor (fan) under the hood and up against the firewall near the center of the car that takes some work to remove. It has gone out in the last 2 of my 4 Cadillacs. Turns out if you're not real careful with the positioning of the spark plug wires they will brush up against it, and if one of them gets cracked or brittle it will "arc" and short out the blower motor. The a/c compressor should still come on (you'll hear a click when it engages) but you won't get any air blowing into the cabin, hot or cold.

The part was like $200 stock (year 2000 prices) and it took about an hour to remove it. My Caddy at that time had this damn strut bar going across the engine bay which we eventually removed to get to the blower motor.

Posted on Apr 09, 2009

  • 14065 Answers

SOURCE: I have a code p452 does anybody know what this

PO 452 FUEL TANK PRESSURE SENSOR CIRCUIT LOW INPUT CONDITIONS.YOUR FTP SENSOR IS DAMAGE OR HAS FAILED.

Posted on Sep 10, 2009

emissionwiz
  • 84027 Answers

SOURCE: my 1999 cadillac deville shows a scan code of

P0440 - Evaporative Emission (EVAP) System leak, poss gas cap not tight or left off

Posted on Mar 26, 2010

Testimonial: "I erroneaously gave emissionwiz a low rating. My intention was to give him the highest rating. His solution was extremely helpful. "

c17hydro
  • 2989 Answers

SOURCE: Where is he fuel filter located on a 1999 Cadillac

Rear of the vehicle by the fuel tank...by the frame rail:


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Disconnect the fuel feed pipe (1) at the in-line fuel filter and return pipe (2) near the in-line fuel filter


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Squeeze the plastic tabs of male end connector of fuel filter

Posted on Apr 19, 2010

  • 2 Answers

SOURCE: 1999 cadillac deville a/c off low refrig error

I had the same problem. The mechanic could not get the compressor to take in new freon. It has to do with the car's memory. You have to reset it by disconnecting the hot wire from the battery which for thirty seconds. This resets the cars internal memory, so it won't remember that it's out of freon. Reconnect it turn on the car and turn on the air the compressor will start.

Posted on Jun 28, 2010

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How to get doors to lock after shifting to drive.on 1999 deville


That may be an optional function. You may have to reprogram that option. Some doors lock when the car is put in "Drive" others when the car exceeds a certain speed ...and you may have the option on the Caddy to do either or ...not have the locks do anything.

How, exactly, you do it on your Cad I don't know. Check the owners manual if you have it. Here's a downloadable .pdf for the manual:

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CB8QFjAA&url=http%3A%2F%2Fwww.vadengmpp.com%2Fowners-manual%2Fcadillac%2F1999-Cadillac-Deville.pdf&ei=dT0MVcW8AvX_sATo-4GYCg&usg=AFQjCNFNsFM9dRUiUZBbRmRAk2MFFIqt3w&bvm=bv.88528373,d.cWc

Check out some Caddy-specific forums...yours is not the only car with this problem. A quick Google search hopefully to get you pointed in the right direction:

https://www.google.com/search?q=%2799+deville+door+lock+settings&ie=utf-8&oe=utf-8#q=%2799+deville+door+lock+problems

Mar 20, 2015 | 1999 Cadillac DeVille

1 Answer

? my 99 deville keeps giving code c1228 how to fix


That code should be left rear(Drivers side rear) wheel speed sensor short to ground, Check to see if wiring has worn thru and is contacting metal some place. GM had problems with water getting into wiring harnesses in rear causing shorts.

Jul 01, 2014 | 1999 Cadillac DeVille

1 Answer

How to fix code P0603 code on 1996 cadillac eldorado


P0603 - Internal Control Module Keep Alive Memory Error

Possible causes- Loose or poor battery terminal connection
- Low battery charge
- ECM/PCM power supply circuit is open or shorted
- ECM/PCM Programing
- Faulty ECM/PCM

Jun 15, 2012 | Cars & Trucks

1 Answer

1999 Cadillac deville had a new alternator installed and a new battery replaced. when car sits down, car will not crank. car has to be jumped off.


REPLACE BATTERY CABLES.SOUND LIKE POOR GROUND AT BATTERY GROUND CABLE.IF BATTERY CABLES OLD AS VECHICLE REPLACE THEM.TURN OFF RADIO FIRST BEFORE REMOVING BATTERY CABLES.IF BATTERY CABLES OKAY.THE STARTER MOTOR COULD BE GOING BAD.

Apr 28, 2011 | 1999 Cadillac DeVille

1 Answer

Can anyone tell me what the following codes are on my 1997 Cadillac Deville?? P0139, P0603, P1139, and P1599.....


Firstly, they are al P type codes, which refers to PCM.

P0139 - HO2S (Heated Oxygen Sensor) Slow Response Bank 1 Sensor 2. This is is the sensor in front of the catalytic converter.

P0603 - Internal Control Module Keep Alive Memory error. This error normally comes up when the battery is disconnected.

P1139 - HO2S (Heated Oxygen Sensor) Insufficent Switching Bank 1 Sensor 2. (see above)

P1599 - Engine Stall or Near Stall Detected.

I hope this helps.....I would attempt erasing the codes first and see if they come back, and then going from there.

Oct 13, 2010 | 1997 Cadillac DeVille

1 Answer

The ecm has detected failed oil level switch. where is it?


well this is the meaning of the codes ,looks like there was a chain reaction ,,,,i have the first code now on my car , i did plugs and wires but no help , good luck,P0300 - Engine Misfire Detected P0463 - Fuel Level Sensor Circuit High Voltage P0603 - Control Module Long Term Memory Reset P0741 - TCC System Stuck Off P1617 - Engine Oil Level Switch Circuit

Jun 14, 2009 | 1999 Cadillac Eldorado

2 Answers

199 Cadillac Deville - Electrical?


its a bad ground its a body computer thats shorting out water will do that

Jun 23, 2008 | 1999 Cadillac DeVille

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