Error Code $0281 - Chevy and GMC Duramax Diesel Forum
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post #1 of 5 (permalink) Old 10-28-2019, 08:55 PM Thread Starter
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Error Code $0281

Im trying to tune my truck following all the steps (unplugging radio fuse, ignition on and truck is not running) when i goto flash the truck pops up with service 4wd so it takes a couple min goes away so proceed and then i get a $0281 code. Anyone know what im doing wrong? TIA
2005 LLY
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post #2 of 5 (permalink) Old 10-28-2019, 09:00 PM Thread Starter
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Also i seen alot of people get it due to outdated firmware but i just got the autocal in the mail. Would they send me it outdated?
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post #3 of 5 (permalink) Old 10-29-2019, 06:15 AM
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Possibly, also most recommend that a low amp battery charge be applied to the batteries while programming.

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post #4 of 5 (permalink) Old 10-29-2019, 06:33 AM
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Motorops has a post about this problem. How to work around $0281 EFI Live Error Code.

2015 Silverado 3500HD 4x4 LTZ bone stock for now
2007.5 Ram 2500 Sold
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post #5 of 5 (permalink) Old 11-02-2019, 11:48 PM
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Even with getting a new AutoCal there’s a good chance you’ll need to first update it.
EFI makes changes once in a while, when the tune was done they probably had a update in the works.

Your batteries need to be above 12 volts when loading tunes with any tuning device.
After having loading issues in the past I now always hook up a battery charger, setting it on float charge or even 6 amp or what ever your charger has for a little lower charge.

You’ll find the tunes load faster when the voltage is around 12.3-12.5.
As soon as you turn the key on the volts can drop in the 10-11 volt range, grid heater and glow plug circuit will take them down.
Even the dealer will hook up a battery charger when they’re checking for updates

I picked up cig lighter/power plug digital volt meter, so I can monitor the voltage while loading tunes.
This one I wired directly to the driver side battery, but your factory power socket will do the same.
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