The check engine light doesn't always need to be on for a code to be active.
Fault codes get stored even if the light turns off. You should be able to look
for stored fault codes.
Interesting stuff
Tom
W3TA
-----Original Message-----
From: RFI <rfi-bounces+thoyer1=verizon.net@contesting.com> On Behalf Of James
Jordan
Sent: Sunday, December 14, 2025 7:42 PM
To: Chuck Gooden <chuck.gooden@comcast.net>
Cc: rfi@contesting.com
Subject: Re: [RFI] Escalade and Power Line RFI
Yep. Check engine light. On for a couple days and then off for a few more,
repeat. I have a code reader but haven’t used it when the light is on.
On Sun, Dec 14, 2025 at 7:04 PM Chuck Gooden via RFI <rfi@contesting.com>
wrote:
> Are you sure it was the check engine light?. Most engine light that I
> know of will come on and stay on because the error code is stored in
> memory. You can reset the error code with a ODB reader.
>
>
>
> On December 14, 2025 11:38:31 PM UTC, James Jordan <k4qpl2@gmail.com>
> wrote:
> >Hmmm. Interesting. I have a check engine light that comes on every
> >now
> and then but after a couple of days it’s off with nothing having been done.
> Shop has never found a problem. I assume system resets and doesn’t see
> anything.
> >My Audi is full of electronics and sleeps a few feet from my ham
> >shack
> built into the garage with a 40m dipole almost overhead. The KPA1500
> power supply is even closer.
> >I’m going to keep tabs on band and power so next time it happens I
> >can
> see if there’s any correlation.
> >Thanks for the tip.
> >Jim K4QPL
> >
> >
> >Sent from my iPhone
> >
> >> On Dec 14, 2025, at 11:51 AM, K4RO Kirk Pickering <k4ro@k4ro.net>
> wrote:
> >>
> >> Here's an RFI story that I've not encountered before.
> >>
> >>
> https://www.motor1.com/news/781675/cadillac-escalade-power-line-lights
> -on/
> >>
> >> Many thanks to all of the RFI hunters and experts who share their
> knowledge on this list, year after year. IMO, this is one of the most
> valuable email lists in all of ham radio.
> >>
> >> —Kirk K4RO
> >>
> >>
> >> _______________________________________________
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> Chuck K9LC
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