SPONSORED LINKS

Check engine light

Tiny
MCAVINEE
  • MEMBER
  • 2004 MAZDA MPV
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
The car that I was replacing the sensor on suddenly the check engine light will not come on at all now and caused a fail at e Check today. It was working fine yesterday and all I did was replace a sensor. What happened now? Thanks
Thursday, February 8th, 2018 AT 7:28 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Does the light come on for a couple seconds when you first turn the key to the on position? If the light does not come on at all, the first thing I would check is the bulb itself.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, February 8th, 2018 AT 6:19 PM
Tiny
MCAVINEE
  • MEMBER
  • 69 POSTS
Thanks. Do you have instructions on how to remove the dash to get to it? Also, I am trying to get to that bank 1 sensor from underneath the car. Really not a lot of choices and not to keen on removing the plenum because of all the connections.
Was this
answer
helpful?
Yes
No
Thursday, February 8th, 2018 AT 8:21 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
I think you popped a fuse or the sensor shorted which made the fuse fail. Here is a guide to help you check the system fuses:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Here are the fuse locations (below) along with a wiring diagram of the ALDL connector.

I would also see if a code reader will power up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Monday, February 12th, 2018 AT 11:31 AM
Tiny
MCAVINEE
  • MEMBER
  • 69 POSTS
Hello,
Thanks for all the diagrams. I went to a junkyard and pulled the instrument cluster out of the same model and installed it on my van. Now all the lights work including the check engine. I have to run through a drive cycle again and hopefully the check engine light will stay off. I have a OBDII scanner which is helpful. Only question I now have is, how to turn back the mileage to the correct miles? Thanks
Was this
answer
helpful?
Yes
No
Monday, February 12th, 2018 AT 4:04 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
You cant, or I should say you will need to have it changed by someone that rebuilds the clusters because it is programmed in.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, February 13th, 2018 AT 10:00 AM
Tiny
MCAVINEE
  • MEMBER
  • 69 POSTS
I did it and it is working fine with the exception of the mileage of which I am keeping track of
Was this
answer
helpful?
Yes
No
Tuesday, February 13th, 2018 AT 10:04 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Perfect its all you can do. Glad you got the problem fixed though.

Use 2CarPros anytime, we are here to help. Please tell a friend.

Cheers, Ken
Was this
answer
helpful?
Yes
No
Tuesday, February 13th, 2018 AT 10:28 AM

Please login or register to post a reply.

Related Check Engine Light Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links