OBD-II Generic Error Code P0606: How to Fix It

Q: Can I drive with error code P0606?

It's not recommended. The ECM controls engine timing, fuel delivery, and emissions. A ROM error can cause stalling, poor performance, or no-start conditions. Have it diagnosed as soon as possible.

Q: Will disconnecting the battery fix P0606?

Sometimes, if the code was triggered by a low battery or temporary glitch. Disconnect the battery for 15 minutes, then reconnect and drive. If the code returns, the ECM may be faulty.

Q: How much does it cost to fix error P0606?

If it's a simple wiring fix, it could be under $100. ECM replacement costs $500-$1500 including programming, depending on vehicle make and model.

Q: What causes a ROM error in the ECM?

Common causes include: low battery voltage, poor ground connections, damaged wiring, or internal ECM failure due to age, heat, or manufacturing defects.

Q: Do I need to program a new ECM?

Yes, most modern vehicles require the new ECM to be programmed with the vehicle's VIN, immobilizer codes, and sometimes calibration data. This typically requires a dealer or specialized locksmith tool.

Abstract

OBD-II error code P0606 means your vehicle's Engine Control Module (ECM) has detected an internal read-only memory (ROM) error. This can cause drivability issues, poor performance, or even prevent the engine from starting. The problem is usually with the ECM itself, but sometimes wiring or power issues can trigger it.