westend wrote:
Nifty gadget but if you have dash gauges I think it would soon be unused. I have a transmission temp gauge. It would be handy in a situation where the check engine light appears so the relevant cause could be found.
You would need a lot more gauges than what's on a dash.. Think Airplane dash board and you are closer, Nuclear reactor control board and you are even closer.. There are many many sensors your ECC reads and can report on.. The data readers can read most all of them.
Your dash has not nearly enough room.
In addition: I do not know about smart phone apps but some of the older computer apps could record, ... There are 3 kinds of error codes your ECC can flash
1: Hard codes: They remain till they are reset
2: Soft codes: They remain till the engine is turned off and on.
3: Transient codes: they go away by themselves
These last ones can not be read with a code reader at the shop cause by the time you get there they are gone.. A recording application or program however can keep a log.