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Re: codes wont clear
What I was trying to figure out is if all 4 codes started at the same time or if they've been adding up over time.
If they all happened at once then chances are there's nothing wrong with the sensors and you need to find out how they are all related.
Perhaps there's a bad fuse. I would make sure of this first.
Also check your battery (load test) and charging system (alternator). A weak battery can throw false codes. I've seen it happen personally.
If the above are good then start with the smallest code (23). See if you can borrow a known working MAF sensor to see if it eliminates one or more codes. Work from there.
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