09-26-2019, 07:09 PM
Cary wrote:
Disconnecting the battery does not clear OBDII (since 1996) codes.
It's part of the spec, specifically designed to prevent "shade-tree" mechanics from clearing codes without resolving issues.
The reality today is, though, that since OBDII was introduced, the price of entry for a scanner/code resetter has become minimal, and anyone can buy one for $20, as mentioned. Then they can clear codes at will.
Ah, I misrepresented what I thought was "clearing the codes". In reality, disconnecting the battery cable causes the "Check Engine" idiot light on the dashboard to go off, which I thought meant the error codes were cleared.
So the codes may still be there without triggering the idiot light?