Check engine light

drtown
0

Asked by drtown Jun 18, 2012 at 09:40 AM about the Mazda Millenia

Question type: Maintenance & Repair

I recently bought a 2002 millenium.  I am aware of potential problems.  Two days ago, the 'check engine light' came on.  At a mechanic shop, two codes showed up- one for a misfire on a cylinder (needing tune-up) and the second related to the EGR sensor.  I plan to do a tune-up and clean the sensor instead of replacing (if possible).  Here is my question.  Last night, the 'check engine light' did not light up. I did add new gas to the tank and did tighten the gas cap.  Any suggestions why the light went off!

4 Answers

Tom Demyan
94,825

Coil Misfires usually will be intermitent. They come and go, and the one coil that is faulty should be replaced sooner than later. Usually when one fails, others follow, so people usually will replace all and the plugs at one time. The EGR can be cleaned of carbon in some cases, but I would have your mechanic clear the codes after the coil change to see if the EGR comes back. Adding gas to the tank might have nothing to do with the light.

1 out of 1 people think this is helpful.
Js08016
19,135

Tom is correct. Also, when an intermittent problem stops for awhile the computer (PCM) turns off the check engine light. The codes are still stored and the problem(s) still need to be addressed. I'd do the tune-up, clear the computer (PCM), and see if the light comes on again. If, after a week or so, the light stays off, you'll be good to go. HTH. -Jim

1 out of 1 people think this is helpful.
terrydevore
0

ive also found out too ...if that gas cap is not turned atleast 3 times my check engine light will come on. once it is tightened right it takes about 20 to 30 miles for the light to go off

Js08016
19,135

There's a pressure sensor inside the gas tank. This is for the EVAP system. The EVAP system "recycles" gasoline fumes back to the engine to be burned instead of being released into the air. When your gas cap is loose the system doesn't build the proper pressure & the computer (PCM) sets a trouble code. -Jim

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Millenia
Looking for a Used Millenia in your area?
CarGurus has 154 nationwide Millenia listings starting at $4,988.
ZIP:

Search Mazda Millenia Questions

Mazda Millenia Experts

#1 Steven Cisneros
Steven Cisneros
Reputation 470
#2 Keith12345
Keith12345
Reputation 250
#3 alej
alej
Reputation 140
View All

Related Models For Sale

Used Nissan Maxima"
723 Great Deals out of 20,131 listings starting at $1,000
Used Mazda MAZDA6"
351 Great Deals out of 13,488 listings starting at $2,495
Used Honda Accord"
1,598 Great Deals out of 65,603 listings starting at $800
Used Mazda MPV"
10 Great Deals out of 596 listings starting at $1,495
Used Mazda 626"
4 Great Deals out of 433 listings starting at $1,995
Used Hyundai Sonata"
1,278 Great Deals out of 54,333 listings starting at $1,095
Used Mazda MAZDA3"
670 Great Deals out of 29,153 listings starting at $2,800
Used BMW 3 Series"
1,555 Great Deals out of 36,201 listings starting at $2,000
Used Mazda Protege"
5 Great Deals out of 466 listings starting at $1,795
Used Mazda Tribute"
51 Great Deals out of 1,267 listings starting at $1,700
Used Mercedes-Benz E-Class"
785 Great Deals out of 15,614 listings starting at $1,800
Used Mazda RX-8"
37 Great Deals out of 644 listings starting at $4,288
Used Mazda 929"
6 listings
Used Mazda MX-5 Miata"
86 Great Deals out of 2,394 listings starting at $1,999
Used Chevrolet Tahoe"
1,081 Great Deals out of 33,345 listings starting at $2,995