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96 Seville SLS... Service engine soon lit, and display reads service emission system, now its kinda sluggish, and doesn't seem to want to shift gears when accelerating, what's wrong with this Damn thing now??

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Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

Posted on Nov 05, 2012

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Posted on Jan 02, 2017

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WHY DOESNT MY 2003 CADILLAC SEVILLE HAVE ANY POWER AND DOESNT WANT TO SHIFT EASILY


1. Verify the exhaust system is not plugged. Check for less than 1.5 PSI backpressure at 2,000 RPM in park, or open the exhaust before the converter.

2. Check the Manifold Absolute Pressure Sensor (MAP) for 4.8-5.0 volts Key On Engine Off (KOEO) and about 1 volts at idle.

3. Check actual engine vacuum at idle at 2000 RPM.

4. Unplug the Mass Air Flow (MAF) sensor, reset fuel trim to 0%, and road test. ALSO CHECK FOR FAULT CODES IN THE OBD SYSTEM.

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1 Answer

I need to take my 96 cadillac seville out of limp in mode. Can I do it without taking it to a shop?


If its an OBDII system try disconnecting the battery for 10 minutes, then reconnect. The computer should reset and all codes except for code 12 will be deleted, unless the problem still exist, in which case soon as it detects the problem again, it will set the same code again.

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I have a 1999 Saturn sc3. It was fine until the hurricane this past weekend. As soon as I turned the car on, the l"Service Engine Soon" light came on. I am wondering if it is safe to drive or...


The Service Engine soon light indicates that something is likely wrong with your emissions system. It could be any number of things but it is OK to drive to a repair shop or parts shop to get the codes read. Some of these issues can cause damage if you don't get the vehicle repaired soon but you can drive it a little bit (you won't need to get it towed).
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Just recently got a 2000 Cadillac Seville SLS with 58,000 miles. It was my late aunts. It pretty much sat in her driveway for a couple of years. Very limited use. I started to drive it and it ran great....


Findout the code. You Said It's Realated To The Transmission I Just Pick Mine Up For What I Belive Is The Samething The Tcc & The Code Is P1860 Thats The Tourque Converter Circuit! You Should Getit Changed Because It'll Save You Gas Pluse Less Tress On The Transmission & Engine & Could Cause Gear **** Stall !
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Have 96 seville service emission system is displaying,


Turn your key to the On position ( don't start it ) now, on your heat/air panel, press and hold the OFF and the WARMER (red) buttons at the same time for about 8sec. You will see your dash light up with every segment lit, you can let go when it starts. Then you computer will run its diagnostic check for error codes. Have a pen and paper ready to copy them down. As a guess, I bet it's going to throw a O2 sensor code. Let me know the codes. After that just turn your key off and your done with that portion.

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it mean that one of the electronic load leveling sensor is not reading. that sensor tells the air pump to fill up that air shock or air bag. the sensors maybe reasonable price wise but if the sensor is reading that an air shock is not holding air pressure and an air shock is not cheap.

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1 Answer

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what do you mean it , shows electrical?

The light on just means you are not passing emissions. not a big deal unless it's flashing.
Go to Autozone, they will scan test for codes for free.

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1 Answer

Emission service


yes have your charging system checked

Jun 13, 2017 | 1996 Cadillac Seville CA Value

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