Cadillac P0606 Error Code: How to Fix It

Q: Can I drive with P0606 error code?

No, P0606 is a critical error that can cause engine stalling, poor performance, or prevent starting. You should stop driving immediately and have the vehicle diagnosed.

Q: How much does it cost to fix P0606?

Repair costs range from $100-300 for wiring issues to $800-2000 for PCM replacement including programming. Diagnosis typically costs $100-150.

Q: What causes Cadillac P0606 error code?

Common causes include PCM internal failure, voltage supply problems, corroded connections, damaged wiring, or rarely, software corruption.

Q: Can a dead battery cause P0606?

While unlikely to directly cause P0606, low voltage from a failing battery or charging system can contribute to PCM malfunctions and should be tested first.

Q: Is P0606 covered under Cadillac warranty?

PCM failures may be covered under powertrain warranty (typically 5 years/60,000 miles). Check with your Cadillac dealer about warranty coverage and any applicable recalls.

Abstract

The P0606 error code in your Cadillac indicates a serious problem with the Powertrain Control Module (PCM) processor. This critical fault means the PCM's internal processor has detected an error in its own operation, which can cause engine performance issues, stalling, or prevent the vehicle from starting altogether.