Code P0300 Cylinder Misfire Detected (Lund E85R)

[blueskies925]

After 24 hours of sitting, your battery should read 12.45-12.6V at rest with no load.

Will get back to you on that after 24 hours lol! I believe it is below that in fact.

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[blueskies925]

So sitting at rest with no load it's at 11.8V, and when driving it's 14.4V.

 

[Cory S]

Toast.

 

[luc]

So sitting at rest with no load it's at 11.8V, and when driving it's 14.4V.

That is not a “no load” condition. Having the ignition on draw current from the battery
No load would be testing the battery with a voltmeter and ignition off
That say I do agree that the voltage seems low
Also, how can the oil pressure say “normal “ if engine not running?

 

[Cory S]

With just ignition on, mine shows 12.4v.

Best way is to put a VOM on the battery the next morning.

 

[Cory S]

TOAST.

 

[AZ18yote]

Interesting you say that because I was already considering needing a new battery as my car recently keeps saying "system off to save battery" or something like that when I get in the car after several days of no driving. However, the voltage levels aren't that low, yet, but do seem to be fluctuating. It's something I will get checked out asap now too!

That's the BMS giving you that message. Fully lock/arm car for at least 8 consecutive hours and that should clear assuming all is well. But replacing battery proactively is never a bad idea.

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