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What do the diagnostic lights mean on a computer

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What does an exclamation mark warning light mean on a mitsibishi mirage dashboard

Probably means that car should have computer's diagnostic read. You can bring into Autozone for free diagnostic readibg

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Dell E510 Diagnostic light 1 is blinking, 2 is out, and 3 & 4 are solid green

those are diagnostic lights which tell a dell tech how to analyze the condition of the motherboard if all four lights are on that indicates a failure more which usually suggest cpu replacement

is your computer doing something odd?

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Servies engine soon light what does that mean

When that light comes on, it means your computer has detected a problem with it's engine management: a sensor or circuit malfunction, or an emissions-related problem that keeps your engine from running at optimal efficiency. It will store a diagnostic code in its memory to be retrieved with a scan tool to direct a mechanic where to start looking for the problem. No way of knowing if it's a major or minor problem without getting the diagnostic codes. If light stays on, have it checked right away.

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There is a picture of a eng. lite on my dash . what dose this mean

It could mean a number of things. If the light is on you need to take this vehicle to the dealer for diagnostics. Usually its a problem with the computer, wiring, or sensors. The dealer has the tools to perform the diagnostics.

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1 Answer

Amber check engine light on a 2003 chevy 2500.

This means your vehicle has failed to complete one or more of a series of self-diagnostic tests, usually but not always emissions related. The only way to find out which system has failed the test is to have the Diagnostic Trouble Codes read with special diagnostic equipment. Once you know the codes stored in your vehicle's computer, it will help determine what repairs are needed.

Jul 24, 2010 | 2003 Chevrolet Silverado 2500

1 Answer

What does check engine electronics means on the dash board

Hi there,

The "Engine Check" means your vehicle's diagnostic computer has detected a system malfunction in one of the many electronic circuits.

If this warning light remains illuminated, then you will need to have your vehicle's Diagnostic computer read asap, at your local Mercedes Dealership (20mins - for a small fee) and have the malfunction corrected.


"If this has helped you in any way, please rate this solution"

Jul 02, 2010 | 1998 Mercedes-Benz E-Class

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1998 chevy monte carlo check egine light wont go out evevn after computer download

if the light stays on, this means the computer has detected a "hard" fault. This means that the fault is present and is detected during the computers power up self test. You need to follow the diagnostic procedures pertinent to the faults given. the light will stay on as long as the fault remains. Simply downloading the fault codes will not put the light out.

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1 Answer

No signal to monitor / Beeping

Listen to the pattern of beeps, or look at the back of the computer to see the pattern of the diagnostic lights ( 4 lights just under the keyboard/mouse connectors) and check out this site to see what they mean:
Beep Code Meanings

Diagnostic Light Meanings

May 29, 2009 | Dell OptiPlex 160L (160LMIN) PC Desktop

1 Answer

Warning lights

this means you have some problems
have a computer diagnostics test done to get the DTC's diagnostic trouble codes

Dec 18, 2008 | 2007 Subaru B9 Tribeca

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Warning light on dash what on..what does it mean

Hi Sneekygirl9!

The light you described is the "check engine" light, and it means that the on-board diagnostic (OBD) computer has detected a problem and set a "trouble code" in the computer memory. Some of these are minor, some are SERIOUS, and a few are just computer glitches.

The OBD either has detected a bad sensor or control circuit, or a sensor reading that is inconsistent (doesn't add up!) to the situation.

AutoZone, among other places, now offers free diagnostic scans, which is what you need to do! They will plug into your car's OBD-II diagnostic port, and the scanner will read the OBD's memory, and give a read out of what trouble code or codes have been set (example: P1536). They will then interpret the code by going to a chart specific to your vehicle and tell you what these trouble codes mean and hopefully point you in the right direction for fixing the problem. And they will also clear the OBD's memory, clearing the check engine light.

Sneekygirl9, I think this answers your question... and don't hesitate to post comments or ask for more help if you need, and let us know how it goes!


Jun 20, 2008 | 2002 Ford Escape

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