Engine light on DME is my main concern?

Tiny
PRRYPERRYS
  • MEMBER
  • 2016 BMW Z4
  • 2.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 36,000 MILES
Car runs great I'm just concerned Engine like says engine electronic DME I don't understand that. Second engine light says anti-theft alarm system DWA. Seem to be electronic but I don't know. The DME is my main concern I would think not sure. Please and thank you for your help. Kenny
Friday, March 17th, 2023 AT 10:27 AM

15 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,114 POSTS
Hi,

If it is running properly, it could be several things. Have you scanned the computer for specific codes? If you have, let me know what they are. They will help point me in the right direction.

If you haven't checked for codes, I recommend having the can-bus scanned. CAN stands for controller area network. Basically, the different modules on the vehicle are connected via a few wires so they can communicate with each other. This type of scan will retrieve codes regardless of the module storing them.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Let me know. Also, please confirm the engine size. Is it a 2.0L turbo or a 3.0L V6 turbo?

Take care,

Joe

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Friday, March 17th, 2023 AT 10:09 PM
Tiny
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Good morning my friend, hope all is well please see picture. This is what came up I put in the VIN number and then I hit scan. Think I did it right.
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Monday, March 20th, 2023 AT 4:18 AM
Tiny
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Code 3490 also came up part # 8661467.
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Monday, March 20th, 2023 AT 4:25 AM
Tiny
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Good afternoon, Joe, I think I was reading scan wrong this is what I got code 3490 and it also says MAP thermostat activation line disconnected.
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Monday, March 20th, 2023 AT 12:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,114 POSTS
Hi,

The code, 3490, is specific to a 12-cylinder engine. What engine do you have? Also, the pics you attached didn't show up. Could you retry?

Let me know.

Joe
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Monday, March 20th, 2023 AT 9:17 PM
Tiny
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  • 150 POSTS
Good morning, Joe, hope all is well. I have a 2.0L 4 cylinder. What is a MAP thermostat activation line. I put in the vin number before scanning instructions said that was best.
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Tuesday, March 21st, 2023 AT 3:41 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,114 POSTS
Hi,

It is a way to better enhance the engine temp control. Basically, the thermostat has the addition of a heating element and is controlled via the PCM.

See pic below.

Let me know if this helps.

Take care,

Joe
Image (Click to make bigger)
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Tuesday, March 21st, 2023 AT 3:14 PM
Tiny
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  • MEMBER
  • 150 POSTS
Hey, my friend, thank you very much. I appreciate that I'm going to have to thermostat tomorrow.
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Tuesday, March 21st, 2023 AT 3:26 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,114 POSTS
Hi,

No problem whatsoever. I hope it helps. If you have a chance, let me know the outcome. I'm interested in knowing.

Take care,

Joe
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Tuesday, March 21st, 2023 AT 6:54 PM
Tiny
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Okay, will do. Thank you
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Wednesday, March 22nd, 2023 AT 7:11 AM
Tiny
PRRYPERRYS
  • MEMBER
  • 150 POSTS
Hey, my friend, I had the thermostat and water pump changed today. The car runs great like a brand-new car with no engine light on of course. I'm going to have to drive it to make sure they don't come back on. I was trying to go see if I could figure it out on my own. I need a vehicle for this Saturday. So, I had to put in the shop spend the money. But it seems to be correct.
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Wednesday, March 22nd, 2023 AT 5:01 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,114 POSTS
Hi,

Thanks for the update. I feel the thermostat was the issue. If it appears to be working properly now, you should be fine.

However, if anything changes, let me know and we'll get it fixed.

Take care of yourself and feel free to return anytime in the future.

Joe
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Wednesday, March 22nd, 2023 AT 6:14 PM
Tiny
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  • MEMBER
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Hey, my friend, thank you very much. I appreciate you guys, you're the greatest. Car is still running great no engine light.
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Sunday, March 26th, 2023 AT 1:22 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,114 POSTS
Hi,

You are very welcome and thank you. We will always be here if you need help, so feel free to come back at any time in the future.

Take good care of yourself.

Joe
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Sunday, March 26th, 2023 AT 8:28 PM
Tiny
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Thank you my friend I'll definitely be back.
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Sunday, March 26th, 2023 AT 11:43 PM

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