Question about 2001 Cadillac DeVille

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01 deville running rich. Why?

Service engine soon light is on and scan engine running rich

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Emission issues. check all vacume lines for cracks. 01..its time for new ones. check all electrical conections e

Posted on Feb 19, 2010

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2 Answers

Engine management light on car runs fine


Service engine soon or check engine light? Engine light needs scanned for codes. Service engine soon is for oil changes and such. To get rid of service lights, turn the key on, press the gas pedal three times within five seconds. The light will flash. turn the key off. it's reset. At least check or change the oil and filter though.

May 30, 2015 | Cars & Trucks

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My 2003 chevy truck 1500 with a v6 runs good 15miles and after that it starts missing and like something holding it back


IF the "check engine" or "service engine soon" light is on. You can take it to most any auto parts store to get the codes read.

Better yet would be to find someone with an actual scanning tool to see what all of the sensors are reading.

IF there is no check engine or service engine soon light on then it could be quite a few different things wrong.

A plugged catalytic converter is a possibility. Another item that i ran across on 3 different vehicles within a day was a bad coolant temperature sensor. All 3 vehicles ran fine when 1st started, but then slowly started to "load up" or run rich. REAL rich.

Turned out on all 3 vehicles there was NO check engine/service engine soon light but after hooking up the scanning tool all 3 showed the coolant temp sensor was reading -40°!!

Yup, the computer was being told the engine was at 40 BELOW zero. The computer took that info and adjusted the fuel/air mixture and timing to help the engine warm up.

While the engine warmed up, the sensor kept saying it was 40 below and made the engine run rich.

This MAY be the problem, but without a scan tool it's hard to say.

Hope this helps.

Feb 19, 2015 | 2003 Chevrolet Silverado 1500

1 Answer

The engine light comes on, mechanic states that the car reads that it is running rich why


You need a better code reader, ie "Mechanic". The ECM should control "Running rich or lean". Is engine light? Quote, Service SOON or Service NOW. SOON is usually minor, but needs to be found in the codes. "NOW" need to be checked immediately.

Nov 09, 2013 | 2008 Chevrolet Impala LTZ

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1999 Ford Taurus se, the car was running fine yesterday but after idling in the closed garage for about a minute it started to sputter with a almost sulfur odor and the service engine soon light came on...


Go to an Autozone, Oreily, or Advance auto parts store. They will scan you car for free and can reveal the Code and possible fix.

Possibly the air sensors went out of balance when there was no fresh air. Sounds like sensors read the engine as "Lean" due to lack of Oxygen and set engine to a rich setting.

Sep 03, 2013 | 1999 Ford Taurus

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I replaced both 02 sensors and still keep get a service engine soon light, with a code p0140 why?


The code is indicating that the reading the computer is picking from the rear O2 sensor is off. This can be caused by many things in the engine, rich fuel mixture, lean fuel mixture. A high-end scan tool needs to be hooked up and a diagnosis done.

Oct 09, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

I replaced the transmission in my 1998 oldsmobile intrigue and now the service engine soon, abs ans tcs lights won't turn off. I have had diagnostics run on it and no codes are found on the computer. I...


THE SERVICE SOON LIGHT IS DIFFERENT FROM THE SERVICE ENGINE SOON LIGHT. MINES ARE ALSO ON AS WE SPEAK . I THINK I NEED TO SERVICE MY ABS BRAKES. WHEN YOU PUT YOUR CAR ON THE SCAN IT SCAN ENGINE CODES

Feb 13, 2010 | 1998 Oldsmobile Intrigue

1 Answer

Engine service soon light is on


TAKE IT TO AN AUTO ZONE & THEY WILL RUN A SCAN ON IT & TELL YOU WHAT THE CODE IT IS, THEN YOU CAN REPLACE WHAT PART YOU NEED.

Jan 26, 2010 | 2001 Buick LeSabre

2 Answers

Service Engine soon light came on. Scan code


If it has been serviced correctly just take it aback and ask them to reset the warnibg light. If they can't then you should chose another garage to service it.

Nov 03, 2009 | 2002 Oldsmobile Silhouette

1 Answer

SERVICE ENGINE SOON LIGHT ON


you need to change the oxygen sensor. it will soon cause you problems. after you need to take it in to  erase the code.

Apr 20, 2009 | 1997 Chrysler Town & Country

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