How to Solve P1604 Starting Fault?
2 Answers
When the car throttle is stuck or there is insufficient oil pressure, the vehicle fails to start successfully; when the car battery cable has been disconnected, Toyota vehicles may not start immediately. Automotive fault refers to the phenomenon where the car system, assembly, or components lose their specified functions. At this time, it is necessary to check the system to eliminate related faults. If the problem cannot be identified through the above steps, you can seek professional help for repairs.
When encountering a P1604 starting fault, I believe this is usually caused by the anti-theft system or key recognition issues. First, check if the remote key battery is depleted and replace it promptly; if that doesn't work, try re-pairing or resetting the key, just like how I helped a friend solve it last time. Then, use an OBD scanner to read the detailed fault codes to confirm if the ECU module is malfunctioning, as the starting circuit involves the anti-theft control unit. If the voltage is normal but starting is difficult, check for looseness or corrosion in the ignition switch and starter relay. It's best to contact a 4S shop promptly, as improper DIY attempts may damage more components and affect driving safety. Remember, regular checks of the anti-theft system and key battery during maintenance can prevent such faults.
