What Does the P1604 Code Mean on a Toyota?
Is your car cranking but not starting? The Toyota P1604 code, or ‘Startability Malfunction,’ is a common but frustrating issue that often comes with a check engine light and can leave you stranded. This guide breaks down the mystery behind the P1604 code. We explore the most frequent causes, from a simple weak battery to issues with the fuel or ignition systems. Learn a step-by-step diagnostic process to accurately find the problem and discover the right way to fix it, so you can get your Toyota starting reliably again.












