Check Engine Light ON? That’s Actually GOOD
0:57
YouTubeMaster Automotive Training
Check Engine Light ON? That’s Actually GOOD
Key on, engine off, and the check engine light turns on? That’s not a problem—that’s proof the system is working. It confirms PCM power, ground, and circuit integrity during self-test. No light at KOEO? That’s where your diagnosis begins. In Rancho Cucamonga and Southern California, real technicians don’t guess—they understand what ...
5.6K views4 months ago
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