What is the solution for the P0606 trouble code?
4 Answers
Delete the P0606 trouble code and check if it reappears. This trouble code indicates a malfunction in the Electronic Control Unit (ECU), requiring replacement of the electronic control module or original factory parts. After the vehicle's issue is resolved, the trouble code must be cleared. Code clearance must be performed according to the specified method for the particular vehicle model.
I also encountered the P0606 trouble code when repairing my car before. Actually, this indicates a problem with the internal processor of the engine control unit (ECU), and it needs proper attention. First, check if there are any poor connections in the ECU's power and ground wires—sometimes false alarms occur due to wiring issues. If the wiring is fine, there's an 80% chance you'll need to try reprogramming the ECU, which requires professional equipment to connect to the vehicle's computer. If that doesn’t work, the only option is to replace the entire ECU module. Last time at the dealership, I saw a Hyundai where reprogramming didn’t help, and they ended up spending over 2,000 yuan to replace the module before fixing it. A reminder to everyone: don’t delay with this fault or try to handle it yourself—take it to an experienced repair shop. Otherwise, sudden engine stalling could be dangerous.
My old Corolla popped up a P0606 trouble code last year, and the car jerked badly when starting. I rushed to my trusted repair shop, where the mechanic said this issue indicated the engine control module was malfunctioning on its own. He first disconnected the battery cable for ten minutes to try resetting the system, but it didn’t work. Then, he used a computer to read detailed fault data and confirmed the module was internally damaged. In the end, he replaced it with a used ECU, costing 1,500 in total including labor. I recommend checking the fuse box before anything else—though it’s not directly related to this fault, you might uncover other hidden issues. Also, ECUs are highly vulnerable to water damage, so be extra cautious about engine compartment waterproofing during the rainy season.
The P0606 trouble code can be quite frustrating as it indicates a CPU malfunction in the ECU. Based on my experience, here's how to handle it: First, disconnect the battery negative terminal for a few minutes - restarting sometimes temporarily clears the code. If the issue persists, check whether the ECU's power supply voltage remains stable around 13.5V. Then take it to a repair shop for ECU reset and reprogramming using a diagnostic tool. Replacement becomes necessary if all else fails. Crucially, inspect the engine wiring harness for any short circuits - last time my car had a similar issue caused by rodent-chewed wires. After repairs, always road test the vehicle - don't just clear the code and assume the problem is solved.
