Hondata

I got an interesting issue. The car will do full throttle just fine during the day time, but doing full throttle runs at night time always throw a p0103 error.

stock intake with sprint/spoon filter, rv6 hfc dp, stock exhaust, stock turbo, hks intercooler, blitz radiator. alot of inconel and gold tape wrapped charge pipe.
custom tune on 100 octane.

any advice for this scenario?

logs attached
fullthrottle afternoon is the one without CEL
fullthrottle night is the one with CEL p0103 error

Air temp is nearly 20 degrees colder. Post the calibration.

the tune is locked by tuner :( i don't have access to it.

Just trying to get some advice on this issue, as it seems to be uncommon.

just based on the logs alone, what do you think might be a possible solution?

Any advice and wisdom regarding the AFM logics would be greatly appreciated !

If it is locked, then only the tuner will be able to make changes. You need to discuss this issue with the tuner so they can help you resolve it.

of course, just wanted to see if this scenario has came up for others before, and what they did to resolve it, thanks.

i'm not trying to fix it my self, just wanted to get some ideas.

P0103 is for MAF high voltage output? what's the criteria to trigger this, any one know or any hypothesis?

if you look at the log MAF voltage went up to around 4.7v. Would that be enough to trigger the P0103?

is it possible to see exactly when the DTC error occurred using hondata log? (this was logged through the flashpro device)

This is all non productive speculation. Without the calibration we cannot tell if the error has been disabled.

Hi !

a couple of non speculative questions =) this is really just my curiosity to understand more about the ecu i'm using

1. AFM maximum voltage enable, if you uncheck this, what does the ecu do?
2. If you disable P0103 in Misc DTC, what does the ECU do?