Question about 2000 Pontiac Montana

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What all is involved when your service engine soon light is on.

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This light can come on for many different reasons. the way to find out what the problem is to read the codes stored in the computer. most auto parts store such as autozone or advance auto will read the codes for free and give you probable causes for the error. most commonly if the light comes on and the car appears to be running properly it is most likely a oxygen sensor gone bad, but to be certain get the codes read.

Posted on Apr 06, 2011

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Everything. The service engine light comes on when the computer has stored a code that the sensors gave it. It could be anything from a bad gas cap to the egr goin bad. Most parts stores have a scanner and will check it for you free of charge. Autozone is one of those.

Posted on Apr 06, 2011

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SOURCE: Grand Am 2003 "service engine soon" light

The service light means something is wrong with the car and it needs attention now. Get the codes checked and that will tell you what is wrong with it.

Posted on Jun 17, 2009

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What does the service engine light mean on a 2015 Ford Edge


Service Engine Soon

If the Service Engine Soon indicator light stays lit after you've started the engine, the On Board Diagnostics system (OBD) has detected a malfunction of the vehicle emissions control system. Contact your authorized dealer as soon as possible.
If indicator light is blinking, an engine misfire may be occurring, which could damage your catalytic converter. Drive in a moderate fashion (avoid heavy acceleration and deceleration), and have your vehicle serviced immediately.*
The Service Engine Soon indicator light illuminates when the ignition is first turned on (prior to engine start) in order to test the bulb, as well as indicate whether the vehicle is ready for Inspection/Maintenance (I/M) testing.
Normally, the Service Engine Soon light will stay on until the engine is cranked, then turn itself off if no malfunctions are present. However, if after 15 seconds this light blinks eight times, it means that the vehicle is not ready for I/M testing.Check this link out Gary.
https://owner.ford.com/how-tos/vehicle-features/dashboard-instrument-cluster/warning-lamps-and-indicators.html

Jul 19, 2017 | Ford Cars & Trucks

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Service engine soon light


A service engine soon light that flashes generally results form an ignition problem with the engine. A service engine soon light that stays on constant results from an emission control system malfunction. A diagnostic scan from the local parts store can determine which emission system is faulty.

on Oct 05, 2010 | Chevrolet 2500 Cars & Trucks

1 Answer

I have a 2001 mustang bullitt that is showing service engine light on. Took it to mechanic and he put 2 different machines on it to show code for problem. No codes coming up and he can't turn off the...


There is a diagnostic procedure in the factory service repair manual for engine light lit ,no codes . Did you take it to ford dealer ? MIL - is referring to check engine , service engine soon etc...
  • MIL always on when engine is running (no DTCs):
  • MIL circuits
  • For Focus, Mustang, Town Car, Continental, LS6/LS8, Escape, Windstar, F-150, Expedition and Navigator/Blackwood:
  • Instrument Cluster, Section 413-01 of the Workshop Manual.
  • All Others:
  • GO to NB1

SERVICE ENGINE SOON indicator After the engine is started, the SERVICE ENGINE SOON indicator will prove out for a duration of three seconds. If the instrument cluster does not receive a message from the PCM within five seconds, the instrument cluster will illuminate the SERVICE ENGINE SOON indicator and log a diagnostic trouble code (DTC).

  • An indicator is inoperative/always on - SERVICE ENGINE SOON
  • Circuitry.
  • Bulb.
  • Instrument cluster.
  • PCM.
  • GO to Pinpoint Test P .

PINPOINT TEST P: AN INDICATOR IS INOPERATIVE/ALWAYS ON - SERVICE ENGINE SOON CONDITIONS DETAILS/RESULTS/ACTIONS P1 CARRY OUT THE INSTRUMENT CLUSTER SERVICE ENGINE SOON INDICATOR ACTIVE COMMAND Trigger the HEC active command MIL.
  • Did the SERVICE ENGINE SOON indicator illuminate?
Yes REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual.

No INSTALL a new instrument cluster; REFER to Instrument Cluster . CLEAR the DTCs. REPEAT the self-test.

Jul 18, 2017 | 2001 Ford Mustang

2 Answers

2004 nissan titan oil pressure drops when idling


Take it to some place like autozone and have them read the codes for free, that will tell you what the issue is.

Aug 30, 2013 | 2002 Chrysler Concorde

2 Answers

Lincoln town car + service engine soon


Service engine soon has nothing to do with service or maintenance . Emission's OBD 2 engine managment system . Light on ! DTC'S - diagnostic trouble codes stored . Your don't know THAT ! Your best bet , take it to the dealer .

Aug 30, 2017 | 1998 Lincoln Town Car

2 Answers

"service engine soon" light on


should have two lights check engine and service engine soon.check engine means there is a malfunction.service soon is reprogrammable,when you change you oil. check you owners manual for reset.

Dec 04, 2010 | 2001 Buick Century

1 Answer

2004 chevy trailblazer-Reduce engine power light, service engine soon light came on together, car lost all power, couldn't even turn the steering wheel, engine stalled. shut off key and started again and...


You need to get the fault codes read to determine where the problem is that set the SES light. Autozone will scan your car at no charge. At some point you will need to get a mechanic involved to further diagnose the codes.

Sep 02, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

Two service engine lights


one is service engine soon referring to the engine and trans. systems, and one is service vehicle soon, referring to body, abs, hvac, etc. systems two different lights for 2 different types of trouble codes

Mar 17, 2010 | 2002 Pontiac Grand Am

1 Answer

What is involve with a service a for a c230 mercedes


if your service engine soon light is on. I call it a idiot light.lol It could be anything. take it to a shop. the mechanic will tell You.

May 24, 2009 | 2007 Mercedes-Benz C230 Sedan

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