7 Fault Code Myths That Cost Car Owners Money (2025)
Over $1 billion annually is wasted on unnecessary repairs due to misunderstood fault codes. Here are the 7 most damaging myths—and what they really cost you.
Complete guide to OBD2 diagnostic codes. Learn what P0300, P0171, P0420, and other fault codes mean, how to diagnose them, repair costs, and when it's safe to drive.
Over $1 billion annually is wasted on unnecessary repairs due to misunderstood fault codes. Here are the 7 most damaging myths—and what they really cost you.
Your check engine light just came on. Here's exactly what P0300, P0171, P0420, and other fault codes mean—plus how much it costs to fix each one.
P0420 code means your catalytic converter isn't working efficiently. Learn what causes it, how to diagnose it, and repair costs from $400-$2,500.
P0171 gets 31,000 searches monthly. Your engine is running with too much air. Here's what causes it, how to fix it yourself, and what it costs at a shop.
P0300 gets 45,000 searches monthly. A flashing check engine light means STOP DRIVING. Here's what causes misfires, how to diagnose them, and when it's safe to drive.
Complete guide to OBD-II fault codes. Learn what P0300, P0171, P0420, and other codes mean, how to diagnose them, repair costs, and when to drive safely. Your comprehensive fault code reference.
Complete OBD-II fault codes guide. Learn what P0300, P0171, P0420 and other codes mean, how to diagnose them, repair costs, and when it's safe to drive.
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