this post was submitted on 20 Dec 2024
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I mean, I don't think they're taking about a full diagnostic. Just the code associated with a CEL.
It'd be nice if you could read the code from the dashboard or infotainment without digging out a code reader.
And it'd be even better if they had human readable descriptions for those codes, especially for OEM specific codes.
For most people, a CEL is all you really need. But sometimes and for some people, just telling them the problem would be super helpful.
For example, a loose gas cap is a CEL. Save people $100 at the mechanic if it was just like "check that your gas cap is tight"
When I've queried DTC using a cheap scan tool it's usually resolved the important (as in emission relevant) DTC information text and most of the non engine stuff. In order to create a DTC there usually is a customer recognisable fault or an implication for emissions performance.
Many of the DTC are spurious and would only serve to confuse the user. As a system integrator, I'm personally responsible for creating tens of thousands of spurious DTC (in a vehicle population of ~100k) and I have to periodically report to management what has been done to reduce that number. The funny bit is when I found the root cause the management completely lost interest in solving the problem because, money ๐
I'm with you though, there's no such thing as too much information. I want to know how my car is doing and fix the problems. Most people in the business do not care and our users are ignorant and apathetic, that's why we can't have nice things.
I mostly just meant "if you're gonna send up a CEL, then tell the customer what the CEL is without going to the mechanic, especially if there is a potentially trivial cause"
But yeah I get that OEMs just don't wanna. Capitalism is gonna capitalism.