Sudden Power Loss Driving On Freeway

[Pogi_R]

Went for a late night drive last night and while doing about 75 on the freeway, there was a sudden loss of power for a split second then everything went back to normal. The car stayed on and rolling, thankfully. The battery and engine light came on right after power loss for about 3 seconds and then went away. Regular maintenance has always been done and the car is currently sitting around 15,000 miles (2025 Type R). The only thing I can think of is that I sometimes leave my key fob in the car overnight so maybe the battery is getting weak and loss of signal made the car think the key fob wasn't within operating distance of the car but that may be a stretch for all I know. Any input from people that have experienced anything similar or know what may have caused it would be appreciated.

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[jtlctr]

Yikes! That sounds scary as hell. Did everything cut out when the engine died, like the headlights and dash lights, etc? I think the first thing to do is make sure all electrical connections are secure, starting with the battery and engine grounds, etc.
I don’t think a dying key fob battery would cause the engine to quit, that would be a dangerous design flaw.
Also, it might be worth scanning the ECU for codes even if the check engine light isn’t on. There could be a stored code that might offer some insight.

 

[0x1d7]

If you start the car and leave keys behind, the car will continue to run though if it is anything like a previous CR-V, will warn you on the dash that the key is out of range.

 

[cryptolime]

check the battery terminal connections. might be loose.

 

[Pogi_R]

Yikes! That sounds scary as hell. Did everything cut out when the engine died, like the headlights and dash lights, etc? I think the first thing to do is make sure all electrical connections are secure, starting with the battery and engine grounds, etc.
I don’t think a dying key fob battery would cause the engine to quit, that would be a dangerous design flaw.
Also, it might be worth scanning the ECU for codes even if the check engine light isn’t on. There could be a stored code that might offer some insight.

Everything stayed on when it happened which was weird. I’ll have to scan it tonight after work. Drove it around this morning and I got an “emissions” and “rev match disabled” warning along with a check engine light that still hasn’t gone away. Thank you for the input! Will check everything you suggested later tonight.

 

[Pogi_R]

check the battery terminal connections. might be loose.

Checked the terminals and they’re tighter than my butthole right now. Was thinking it might also be an evap issue from not tightening the gas cap so I tightened it but my engine light has still been on the whole day today.

 

[YevNi]

Goodluck OP...
Personally I'd do a code check then unseat the battery terminal and retighten after a few mins to let the ECU reset.
Those bluetooth OBDII readers are cheap, or autozone/oriley's will let you scan free too.

Keep us updated!

 

[Websitesdown]

Goodluck OP...
Personally I'd do a code check then unseat the battery terminal and retighten after a few mins to let the ECU reset.
Those bluetooth OBDII readers are cheap, or autozone/oriley's will let you scan free too.

Keep us updated!

If he has hondata flashpro he can download the phone application $10 and check codes and clear them.

 

[optronix]

Bad gas? Any mods?

Start with the obvious and work from there. If there are tunes or mods involved that's very likely the culprit, otherwise it might be worth to skip the guesswork and get it in to the dealer for the paper trail at least.

TIL the FL5 has a gas cap...

 

[Websitesdown]

Bad gas? Any mods?

Start with the obvious and work from there. If there are tunes or mods involved that's very likely the culprit, otherwise it might be worth to skip the guesswork and get it in to the dealer for the paper trail at least.

TIL the FL5 has a gas cap...

If you take the gas cap off while filling up with it running or just while it's running, it will throw the low fuel system pressure code and it's a pain to clear. If you have the hondata phone app it's a savior for clearing that code and other codes but I've only ever gotten that code thrown at me, knock on wood.

 

[Websitesdown]

Goodluck OP...
Personally I'd do a code check then unseat the battery terminal and retighten after a few mins to let the ECU reset.
Those bluetooth OBDII readers are cheap, or autozone/oriley's will let you scan free too.

Keep us updated!

That code will not go away without clearing it. Battery disconnect will not work for the low fuel pressure code.

 

[22Si]

Check for codes or any stored codes.

What mods do you have?

 

[Xmetal]

OP, why are you trying to diagnose it yourself if your car is still under warranty? Don't try to clear any code(s) if I were you. I would at least let the dealer try to diagnose it first so they can document it in case it does becomes an actual problem down the road for you to have some leverage for a lemon law!

 

[Websitesdown]

OP, why are you trying to diagnose it yourself if your car is still under warranty? Don't try to clear any code(s) if I were you. I would at least let the dealer try to diagnose it first so they can document it in case it does becomes an actual problem down the road for you to have some leverage for a lemon law!

If he doesn't have mods go to the dealership. If he does, we're his help.

 

[Pogi_R]

OP, why are you trying to diagnose it yourself if your car is still under warranty? Don't try to clear any code(s) if I were you. I would at least let the dealer try to diagnose it first so they can document it in case it does becomes an actual problem down the road for you to have some leverage for a lemon law!

No mods and you are absolutely right, that should have been the first thing I did. Just wanted to see if it was something minor that I could fix on my own before I took it in. To be honest, I'm so used to having old cars with no warranty that it slipped my mind the whole weekend but I really should be taking advantage of the 7 year bumper-to-bumper warranty I got with the car.

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