CEL Coming On 98 Civic

[RMilesS300]

Hello,

I've got a P28 with an S300 installed, and I've connected it to a 1998 Civic CX with an automatic transmission through a conversion harness. I understand that hondata is for manual transmissions, essentially I'm trying to be able to just idle in neutral right now and tune it later when I do an MT swap.

The CEL blinks on and off whenever the key is turned or the engine is on, but there are no codes. During the time I idled it, it seemed to be in limp mode. Any ideas on what could be the cause of the issue?

Again, I'm just trying to wring out issues before I actually do the swap.

Thanks

[DaX]

What code is it blinking? When you say no codes, I assume you mean no codes through SManager?

[RMilesS300]

That's correct, there are no codes though SManager. The datalogging works fine as well.

The CEL blinks in a pattern, 2 long blinks then a short blink before a longer break, then repeats the cycle.

[DaX]

21 is the VTEC control solenoid. If your CX has not had an engine swap, there is no VTEC, which is why the light is on. Go into SManager and disable VTEC.