A few weeks ago I got a message Saying my auxiliary battery malfunctioned. So I'm waiting on one that I just ordered and now today my check Engine light came on, I took it to autozone. And this is the code, it is giving P1523 And 267F00. It says, the check valve of the evaporative emission control system (at partial load) is Jammed open open. I have a 2016 mercedes benz cla 250. Could this all be due ro the auxiliary battery malfunction?
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Hello, the quick answer is: maybe yes, maybe no.
A longer answer - check engine warning lights and trouble codes can definitely occur due to low battery voltage being a concern. However, the trouble codes that are set are usually related to module operation, low battery voltage within certain systems detected, or functionality of operational components not working due to low power.
Since this trouble code is more closely associated with a specific component or function, I'd say it's worth tracking down and testing to determine if there's a failure there.
Always, I would recommend repairing the things you know to be faulty before going into other things. If you have to replace the battery still, do that first and then recheck.
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