Hi All,
I purchased my 2017 F-250 SD in March and have since found these codes using Forscan. All lights and indicators work fine so I'm stumped as to what these codes mean. If I have accessories turned on, even for a short time, the red battery light appears in the dash. Not sure that's normal or indicating excessive battery drain.

FYI, I've cleared these codes and they appear again.

Thanks in advance.

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Off hand I'd say you have a truck that had incandescent lighting and the bulbs were swapped out for LEDs. Does the flasher display in the dash blink very quickly?

As far as the other items, all reporting an issue with voltage would indicate a battery issue, a wiring issue, etc. Have you measured the alternator output under load?

 

Yeah, looks like someone installed LED bulbs.

 

Was the test with the key on and engine off or when running? I would suspect the bulbs were changed to LEDs and that is the issue. There are some changes you can do it with FORScan to correct the fast blinking (not sure it will get rid of the codes). If the bulbs are the correct incandescent bulbs and the test was key on engine off, I would suspect a dying battery (I would guess you would notice a slow crank if the battery were going bad) or wiring issue. If key on engine running, id suspect the alternator is not putting out what it should. But you should find that you can't drive to far before you drain the battery and everything starts going into a limp mode or just stops working.

 

Thanks for the replies.

I assume the lights are all LED so I really appreciate the heads up here and I'll check closer. I would never have considered that they may have been changed out as I thought LEDs were standard.

The flasher blinks normal speed.

I can't recall if the key was on or engine running. I'll clear the codes and then have another check.

Regarding the battery icon on the dash, this only illuminates when the engine is off and accessories on for a short period. It goes out as soon as the engine is running and there are no other signs of poor 12V feed. I have not checked the alternator output when under load but will do that. There is no slow crank. I did have auto electrician check the batteries but he said they were ok. The voltage is down a bit so I suspect they may be on their way out.

 

Hi,
I checked yesterday and the codes only appear with key on/engine off. Bulbs are incandescent except for the few on mirrors etc. Alternator under load still punches out 13.5V.

Although the engine has never slow cranked, I watched the battery voltage drop to 11.9V while I was checking these DTCs. So, I suspect that the batteries have an issue. They are original but only 3yr 3mth old though.

Once again, I really appreciate the replies and tips. Thanks.

 

My 2017 owner's manual suggests replacing the batteries every 36 months. You're due.