Question about 1999 Pontiac Grand Am GT

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Service engine light

"service engine soon" light comes on. what is my course of action?

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Need to find somebody to hook a scanner to your car to read what the computer is saying (usally a number code) call your local auto parts store to see if they have one (auto zone usally free) if not dealers or mechnics have them, then go from there

Posted on Sep 12, 2009


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Posted on Jan 02, 2017


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Got a 1997 Chevy Suburban 5.7 liter 4 wheel drive and the check engine light is steadily on. I not too long ago changed the spark plugs and just changed the EGR VALVE. As I drive now it's running rough....

What you do when the engine light comes on is to stop the vehicle ---check the oil level and let it cool down then check the coolant level at the radiator. The engine light is the message to you that the CPU has found sensors /servos that have gone outside set parameters and your course of action then is to prove that the engine is safe then run the fault codes to find the recorded faults and fix them . use the code reader to reset the CPU to ensure that the faults are fixed.

Nov 11, 2013 | 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 .

  • 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

1 Answer

Check engine is always on how to reset?

Cars have numerous sensors on the engine/drivetrain. The check engine light will come on if the cars electronic control unit (ECU ) detects a fault in a sensor. More often than not - you have to take to to a service place or dealer's service department. They hook up to a port - often inside the car. They then access the ECU memory to see what created the fault. Then - they will recommend a course of action - all at a cost of course unless the car is under warranty.

May 01, 2012 | Cars & Trucks

1 Answer

Service engine soon light came on, changed oil and of course changed filters checked gas cap all good any ideas

There are really too many things to list that can cause the service engine soon light to come on. I suggest you have your mechanic scan your vehicle to see what codes are present to cause the light to come on.

Aug 12, 2011 | 2003 Suzuki Aerio

1 Answer

When service engine light comes on.What does that mean

consulted with a 5th grader, seems the course of action is to take it somewhere and have a mechanic service the engine. seems they have computer analyzers which they connect to a port on the car and it reveals an error code or codes that lead to a diagnosis of fault and plan for suggested repairs.

adults on the other hand tend to think that the light coming on should cause one to ask random strangers what this light could possibly mean. it is in a car and it does say service engine on it, but that is just not enough information to suggest a rational course of action.

Feb 08, 2011 | 2004 Mercury Mountaineer

2 Answers

How to reset "service engine soon" light?

Go to your local autoparts store and they can scan it and reset it for free. Get and note the code that they give to you and I can give you the right course of action to repiar it.

Nov 08, 2010 | 2001 Ford F250 Super Duty Super Cab

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Good afternoon i have a ford focus 2002.a light has just come on the dashboard (engine symbol) can you tell me the light is and is it going to course me any problems.

Sounds like a service engine soon light. I would have the car scanned to see if there are any codes.

How is it running?

Jul 31, 2010 | 2000 Ford Focus

1 Answer

My dash lights come on at all different times,saying change oil soon,when i change it every 3000mi..and somtimes the service engine soon light comes on..then goes off,then comes on,what do i do

These looks like normal service indicators, I would have thought they would be reset via the diagnostics terminals by the servicing engineer.

Once of course, when the indicated unit had been serviced. I think you may have to go to a garage and get them reset but take care that whatever is indicated gets the attention it needs.

Jul 01, 2010 | 1999 Buick Regal

2 Answers

Service engine soon lite come on and poor fuel milage

if its got over 100.000 miles on it your o2 sensors are probably bad,converter might be stopping up

Jan 30, 2010 | 2001 Chevrolet Silverado 1500

4 Answers

Service engine soon light on was fine yesterday morning in the afternoon it was on and is still on what could this mean

If the light was flashing when it came on, then it means your engine is misfiring.

A solid light can mean anything from a loose/faulty gas cap to a transmission issue.

This light comes on when the computer detects a fault of some sort in its diagnostic tests. If it keeps detecting this issue, the light will remain on. If the light turns off, then it has detected that the issue may no longer be present.

In order to find out what the exact reason was for your light, You need to have your car computer scanned to retrieve the code that the computer would have stored when the light triggered. Most garages will do this free of charge. The code will tell you what may have caused the light to initially turn on.

Nov 04, 2009 | 1997 Chevrolet Blazer

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