Question about 2002 Chevrolet Silverado 1500

1 Answer

Service Engine Soon light, but no trouble codes

My 2002 Silverado has the Service Engine Soon light on constantly, but when I tried to download trouble codes, none came up. What gives? Is there a programming which will not tell you what is the problem?

Posted by on

  • 2 more comments 
  • prevattgman Nov 21, 2008

    what do i do ??

  • bumpthedj Dec 03, 2008

    i was told there was a bad fuse but i cant find a bad one my shifter blinks a few times befor it shiftsin to 4/4 and u can here it shift but there is nothing to the front drive shaft u can p-brake and the front shaft off the transfor case will not turn

  • mrgymguy Jan 28, 2009

    Yeah, I know about this problem. I have had it for about 18 months. several mechanics reset the sensor several times only to have it come back on days later. I finally took it to the dealer and they had it for a whole day w/o finding the cause of it, (oh, btw they had also reset it prior to this time). So now, I am back at the dealer for several issues (differential fluid leaking, pwr mirror switch not working, and.....the continued engine ligjy not coming on) and they said it is the evap vent solenoind? Maybe it is a multitasking thing? go figure.

  • Anonymous Mar 24, 2014

    when an (engine service soon) light up on your dash broad. What can the most comment promble



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has written 7 tips or uploaded 3 video tips

  • Master
  • 674 Answers

What are you using to download your codes

Posted on Sep 10, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

On my 2002 Chev Sil Z71 I have OBDII ..Can I use the paperclip to A and B in Diagnostics to locate code in memory that is giving me the service engine soon light on dash ?

NO! there is no way of retrieving the trouble codes by means of the check engine light. but if you go to auto zone they will pull the codes for free.

Jan 29, 2011 | 2002 Chevrolet Silverado 1500


How To Check & Reset Your 2002-2006 Nissan Altima Service Engine Soon (SES)...

The following directions will help you decode your 2002-2006 Nissan Altima's Service Engine Soon (SES) light and reset it.<br /> <br /> <span style="font-weight: bold;">Obtain The Trouble Code</span><br /> <ol> <li>Turn the ignition key to the ON position and wait three seconds.</li> <li>Put the accelerator pedal to the floor and release it five times in less than five seconds.</li> <li>Wait exactly seven seconds. Put the accelerator pedal to the floor for ten seconds until the SES light flashes.</li> <li>Release the accelerator pedal and start counting flashes to obtain the four-digit trouble code.<br /></li></ol> <ul> <li>Long flashes (0.6 seconds) indicate the first digit of the code; count the blinks one through nine and write down the first digit. (Ten blinks indicates a zero.) </li> <li> The next three digits blink faster (0.3 second) and have a 1 second pause between digits.</li> <li>The ECM code repeats until you turn the ignition key to the OFF position.</li> <li>You can look up the trouble codes in the Service Manual.</li> <li>If you get four blinks of ten, or 0000, the ECM indicates no malfunction.<br /></li></ul> <br style="font-weight: bold;" /><span style="font-weight: bold;">Clear The Trouble Code</span><br /> <ol> <li> Clear the code and the SES light by holding the accelerator pedal down to the floor for 10 seconds or more while the SES light is blinking.</li> <li>When the pedal is released, the ECM will erase the trouble code(s).</li></ol>

on Feb 15, 2011 | 2002 Nissan Altima

1 Answer

Service engine light is on even after disconnecting the battery for five minutes

The service engine light is on because the built in onboard diagnostic system it trying to tell you that it has diagnosed a problem and stored it as a trouble code in the vehicles computer. Disconnecting the battery wont make it go away. You should get the codes read, and the code reader can reset the light, but if the problem is still there the light will come back on pretty soon. Most major auto parts stores will read these codes for you for no charge. Write down the code that is in your trucks computer so you will know what the computer logged as trouble.

Dec 18, 2010 | 1999 Chevrolet Silverado 1500

2 Answers

Service engine soon light came on

The computer or ECM constantly tests operation of all sensors and components. When any of the sensor signals is missing or out of normal range, the ECM sets a fault and illuminates the "Check Engine" or "Service Engine Soon" light also called MIL (Malfunction Indication Light) storing the corresponding Diagnostic Trouble Code (DTC) in the ECM memory.

The same happens if a mechanical component of controlled system fails. For example, mechanical problem inside the transmission also can turn the "check engine" light on. Even not properly closed gas cap will cause the "check engine" light to come on - the ECM constantly checks if the gas tank is sealed properly.

To sum up, when the "Check Engine" or "Service Engine Soon" light comes on and stays on, there is a problem with your vehicle. This could be a problem with the engine, transmission, or some emission-related component or system.

The stored trouble code can be retrieved with the special scan tool by the technician. The code itself does not tell exactly which part to replace, it only gives a direction where to look for - the technician has to perform certain tests specific for each code to find the exact cause of the problem.

Scanning for knowed exactly what fault code you have there.

Tell us news (remember rated this post).

Apr 14, 2010 | 1999 Buick Regal

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

1999 chevy silverado seveice engine soon how to recet light

must have a scanner to reset light but it will come back on until you fix the problem have the system checked to get trouble code that will let you know where to start

Feb 17, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Why is my check engine soon light on?

Why my Check Engine/Service/Check Engines Soon light comes on?
The engine computer or PCM/ECM
All modern vehicles have a computer or the ECM (Electronic Control Module) that controls the operation of the vehicle powertrain (the engine and transmission). The main purpose of this is to keep the engine running at top efficiency with the lowest possible emissions. With constantly growing demands for better fuel economy and new strictest emission regulations it's not very easy to achieve. The engine parameters need to be constantly and precisely adjusted according to various conditions such as speed, load, engine temperature, gasoline quality, ambient air temperature, road conditions, etc. That's why today's cars have much more electronics than in early days - there is a large number of various sensors and other electronic devices that help the vehicle computer or ECM to precisely control the engine and transmission operation and monitor emissions.
The vehicle computer system has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and your car needs to be looked at. To properly diagnose what is wrong, you need to take your car to a mechanic or a dealer. The technician at the dealership or a garage will then hook up the scanner to the car computer and retrieve the stored trouble code(s). Then he (she) will look it up in the service manual provided by a car manufacturer. The service manual contains the list of possible codes (about few hundreds) and describes what each code means and what needs to be tested. The code itself doesn't tell exactly what component is defective - it only indicates where to look, what engine parameter is out of normal range. The technician will have to perform further testing to pinpoint a defective part.

Nov 16, 2009 | 2002 Saturn Sl

2 Answers

I have a service engine soon light on and my cruise quit working. I just put a new battery in it.

run scanner for trouble codes, some auto parts stores will do this for free

Oct 06, 2009 | 1994 Buick LeSabre

2 Answers


without knowing the trouble code that is set in memory anytime the check engine light comes on there is no way to know the problem or if there is a fix under any type of recall, there are over 200 fault codes poss in this system, have it tested for which code turned the light on.

Sep 28, 2009 | 2002 Oldsmobile Intrigue

3 Answers

Po452 trouble code changed sensor engine light

you might try unhooking the battiey for 20min both + and - posties cuz that will force the computor to have to resest only if you have addressied the fuel pressure problem which taht would most likly be your filter which isn't all that much

Sep 21, 2009 | 2000 Chevrolet Silverado

Not finding what you are looking for?
Cars & Trucks Logo

1,572 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides