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AEM L54.9 Error Code

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Old Sep 12, 2023 | 12:03 PM
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2001PewterWS6
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Default AEM L54.9 Error Code
I have a new AEM 30-0300 wideband that will work part throttle then getting L54.9 code then shows heater then works again, also reads 7.58 at WOT. Anyone else have this issue? Power and ground are through the cigarette lighter plug
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Old Sep 13, 2023 | 11:31 AM
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Well it ended up being a LS4.9 error code and after talking with AEM the unit was deemed defective and will be replaced. Hope this helps someone else out in the future
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