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Why does the Check Engine Light still require a code reader?


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TC
Novice

Jan 21, 2016, 1:28 PM

Post #1 of 5 (671 views)
Why does the Check Engine Light still require a code reader? Sign In

I'm shopping for a new car, and I just discovered that modern cars -- cars with computer screens built into the consoles -- still have check engine lights that require a code reader to decipher.

For God's sake, why?!? Why doesn't the car write the diagnosis directly to the computer screen instead of requiring a code reader? I don't understand...


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Jan 21, 2016, 1:43 PM

Post #2 of 5 (662 views)
Re: Why does the Check Engine Light still require a code reader? Sign In

The only vehicles I know of that have a on board diagnostic system that can be used by the driver through a display was the older Cadillacs. The OBD laws require the manufacture to allow communications with the vehicle system through a diagnostic port to be standardized. I really don't think the manufacture is going to waste tons of money designing a system that can be interfaced by the driver via a display for the simple fact that most drivers wouldn't know what they are looking at or even how to use it. Besides there are multiple companies that make tools to interface the vehicle through the diagnostic connector.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 21, 2016, 1:48 PM)


kev2
Veteran
kev2 profile image

Jan 21, 2016, 1:45 PM

Post #3 of 5 (659 views)
Re: Why does the Check Engine Light still require a code reader? Sign In

capitalism ! unchecked unbridled


feel the bern


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 21, 2016, 1:56 PM

Post #4 of 5 (657 views)
Re: Why does the Check Engine Light still require a code reader? Sign In

TC - this isn't anything new now. Well over 30 model years and people still can't read how to change a tire so why expound on your dash or something? It isn't telling you what to replace or repair but rather what it sees and which circuit involved. Takes a tech most of the time anyway to interpret that into a fix or service,


T



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Jan 21, 2016, 5:45 PM

Post #5 of 5 (643 views)
Re: Why does the Check Engine Light still require a code reader? Sign In

I'm sure in the future the cars will be able to find the problems on their own. Just like the HAL9000 did in 2001 Space Odyssey. "Dave, there is a short in the injector circuit. Dave, I read your lips, you can't disconnect me." " Dave, why are you doing this?" " I can't take cheap gas, Dave."





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jan 21, 2016, 5:50 PM)






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