SPONSORED LINKS

OBD2 says everything not supported

Tiny
JIM ANDERSON2
  • MEMBER
  • 1999 HYUNDAI SONATA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 175,000 MILES
I cannot pass or fail the emission test cause they cannot get my car to read. All the monitors say unsupported. This car has always passed before. Nothing new has been added. The check engine light is even on, however when I plug in my hand scanner it says there are no codes?
SPONSORED LINKS
Thursday, August 24th, 2017 AT 9:16 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
So your scanner communicates but theirs did not? It sounds like you need to go to a different smog shop.

Am I correct or reading it wrong?
Was this
answer
helpful?
Yes
No
Friday, August 25th, 2017 AT 11:39 AM
Tiny
JIM ANDERSON2
  • MEMBER
  • 2 POSTS
Sorry, My scanner turns on but as you can see, everything is unsupported. Check engine light is on, so I assume the ECM is working.
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, August 25th, 2017 AT 12:53 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
It does not seem to be communication like the ECM is bad does it run okay? May be some of the ALDL connector wires have a short or open circuit.

Here is a guide and a wiring diagram so we can do some simple testing:

https://www.2carpros.com/articles/how-to-check-wiring

Make sure all the wires work test at the connector.

Fun to see what it is.

Cheers, Ken
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Friday, August 25th, 2017 AT 7:25 PM

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