Question about 2002 Cadillac Deville

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I have a cadillac 2002 dhs. It has an idling problem!

I have a cadillac 2002 dhs. It has an idling problem when stationery. Used gas treatments, etc. No response. Now service engine light is on. Any suggestions?

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You MUST determine ("Due to Check Eng. Light") What the Code / Codes are stored in Computer , as they May Lead us DIRECTLY to the Problem.
Having Said that and with & In my Experience, the Throttle Bodies, AND the EGR Valves Get "CARBONE FILTH " Badly and Block Passages that Are in the "IDLE" Circuit of Throttle Body
side, and In the EGR Valve side of things it causes VACUUM LEAKS @ EGR Valve, This Requires physically Removal of and the Cleaning of these parts by hand. Also the IAC> Idle Air Control Solinoid Can Cause this too Or a Mix of All 3, BUT >>>>>>>>>>>>>>
First thing is I need to know Why Check Engine Light is on that is Determine What Codes Exist On Compter P L E A S E RESPOND BACK TO ME WITH This Information and we can go on from here. I Truely Hope I Can Be of Good Help to you. Waiting for Your RESPONSE.

Posted on Jun 15, 2009

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Posted on Jan 02, 2017

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Each time that I fill up my gasoline tank, my car doesn't want to start. Once the car is started, I have to keep the idle up because of rough idling. when I do start to drive, No other problems..


Do you always buy your gas from the same place? Sounds like that are either adding water to the gas, or their storage tank is allowing water in from somewhere.

Try adding one of the Gas Treatments from an auto store. There is one which is used for gas storage and helps to remove condensed water during winter storage or boats and mowers, etc.

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How do I check codes on my 2002 Cadillac dhs


Buy a EODB computer and plug it in to read the codes.

Oct 19, 2014 | 2002 Cadillac Deville

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How to do an idle relearn for 2001 cadillac DHS


is simple. start the car and let idle for 2min. drive 1 mi.w/o el. load and 1mi. with el. load(a/c, light) idle 2min. and is ready.

Apr 11, 2014 | 2001 Cadillac DeVille

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I have a 2002 cadillac deville dhs the lights in the instructment panel goes dim on their own


When this happens, it is likely because the headlights came on due to the automatic sensors. If that is the case, the condition is normal.

Sep 04, 2013 | 2002 Cadillac Deville

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2002 Cadillac deville DHS. Before take the smork


Whatever is causing the timing adjust itself at the wrong time. It could be anything from a vacuum leak, to a coolant sensor to electrical problem. By reading all the LIVE READINGS from the sensors & getting an emissions reading will help u narrow down the problem. It doesn't sound like a DIY fix. Equipment needed

Apr 20, 2017 | 2002 Cadillac Deville

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I have a 2002 cadillac dhs and the check coolant level comes on. why is this happening. I had the system flushed and it still comes on. Also, my check system stablilizer comes on also. Please, I do...


Re: I have a 2002 cadillac dhs and the check coolant level comes on. The coolant sensor is located in the overflow bottle and it is prone to failure. Unfortunately the only way to get it is to repl. coolant overflow bottle.

Nov 28, 2010 | 2002 Cadillac Deville

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HOW DO YOU CAHNGE THE THERMOSTAT ON 2002 CADILLAC DEVILLE


The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.The hose goes in to the engine to a crossover and comes out the other side to near the thermostat housing,the blockage may be there.

Jan 28, 2010 | 2002 Cadillac Deville

1 Answer

98 cadi dies at stop lighs after a min or two but runs fine every where else


use gas treatment, i like stp concenstrate. in a black bottle. run a couple of bottles thru. one at a time of course. bottle recomends gas tank to be full. but i have used gas treatment with 1/4-1/2 tank of gas. it works

Jan 09, 2010 | 1998 Cadillac Seville

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What is the battery warranty for a 2002 DHS Cadillac?


Cadillac original battery warranty is 4 years or 50,000 miles.

The 6 year pro-rated warranty marked on the top is only valid for purchased batteries; originally installed batteries or batteries installed under warranty still end their warranty at 4y/50k.

Oct 17, 2009 | 2002 Cadillac Deville

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