how to reset the check engine light

Asked by Aug 05, 2007 at 12:20 AM about the 2002 Mazda Millenia 4 Dr S Supercharged Sedan

Question type: Maintenance & Repair

How do you reset the check engine light on a Mazda Mellenia 2002?

8 Answers

31,335

Not exactly sure how to reset the computer. I know on my car if you unhook the battery from the car and then reconnect it resets the system.

3 out of 3 people think this is helpful.
340

the light comes on when 1) the emmision excedes the 1.5 goverment standards, 2) component faliure, 3) or if the PCM can't "see" a component. so if the light is still on after a "fix" then you did not fix it, because the car will do a self test and if everything is correct then the light will turn off.

6 out of 6 people think this is helpful.
745

The light will not turn off by itself, it stores the codes for diagnosis even if the problem went away. To reset it disconnect your negative battery cable and step on the brake to make sure everything is discharged. Reconnect and it should be good, if the light comes on again, go get your codes read and you can visit MazdaWorld.org and we can help you solve the problem.

10 out of 10 people think this is helpful.
130

Sometimes Disconnecting the negative battery cable resets, but on newer cars you have to hook up a scan tool and clear the codes depending on the code that was set. some codes do not go away until so many drive cycles have completed which can take a long time. Some times that car has to run that test again and it has to pass it so many times before it goes away.

2 out of 2 people think this is helpful.
130

It could be fixed codes do not always turn off after you fix the component. the PROPER way to shut the light off is to clear the codes with a scan tool. if the light returns then it wasn't fixed.

2 out of 2 people think this is helpful.
3,375

Disconnecting the battery will not clear the codes, you need a scan tool. The ECM has an internal battery to keep the codes in case the battery gets disconnected. By the way, when the light comes on, that means your car has an emissions control issue, and that should be fixed, not cleared and ignored. Also, your car has almost 2000 different codes available, so it needs to be scanned to find the issue.

1 out of 1 people think this is helpful.
745

We are not talking about "most cars" we are talking about a Mazda Millenia in this case. I own one and know for a fact that disconnecting the battery and draining the capacitors will clear the codes the same way that clearing the codes with a code scanner would. Yes a CEL light does mean you have a problem that should be fixed but sometimes before fixing the problem you should clear the codes and see if the problem comes back and then diagnose the problem from there.

21 out of 21 people think this is helpful.

Hello, I just want to let you all know that I have a 1999 Mazda pick up truck B2500 with the engine light on. I did disconnected the negative for 20 seconds and I reconnect, turn the truck on and the engine light was gone. So it works on my truck. the guy at autozone check the code and i have a misfire, I notice that, but i will do a tuned up see if it works and the engine light doesn't turn on again.

Your Answer

Add photo

Related Questions

Millenia

Looking for a Used Millenia in your area?

CarGurus has 93 nationwide Millenia listings starting at $1,700.

ZIP:

Search Mazda Millenia Questions

Mazda Millenia Experts

#1 Steven Cisneros
Steven Cisneros
Reputation 710
#2 Keith12345
Keith12345
Reputation 420
#3 Tom Demyan
Tom Demyan
Reputation 230
View All

Related Models For Sale

Used Honda Accord
759 Great Deals out of 87,614 listings starting at $1,250
Used Mazda MAZDA6
101 Great Deals out of 16,080 listings starting at $1,500
Used Mercedes-Benz S-Class
125 Great Deals out of 6,581 listings starting at $1,200
Used Toyota Corolla
688 Great Deals out of 72,328 listings starting at $600
Used Chevrolet Impala
526 Great Deals out of 29,493 listings starting at $799
Used Toyota Camry
844 Great Deals out of 90,111 listings starting at $950
Used Audi A4
200 Great Deals out of 10,806 listings starting at $700
Used Lexus ES 300
19 Great Deals out of 957 listings starting at $1,799
Used Ford Mustang
374 Great Deals out of 46,937 listings starting at $1,999
Used Nissan Sentra
430 Great Deals out of 56,358 listings starting at $1,499
Used BMW 3 Series
966 Great Deals out of 33,256 listings starting at $1,000
Used Nissan Maxima
280 Great Deals out of 26,376 listings starting at $1,989
Used Nissan Altima
827 Great Deals out of 79,428 listings starting at $1,677