GM Error Code P1626: How to Fix It

Q: What does GM error code P1626 mean?

P1626 means the theft deterrent fuel enable signal has been lost. This prevents the fuel injection system from operating, causing a no-start condition or immediate engine shutdown.

Q: Can I drive with P1626 code?

No, you cannot drive with code P1626. This error prevents the engine from starting or causes it to shut down immediately, making the vehicle inoperable.

Q: How much does it cost to fix P1626?

Repair costs range from $50-200 for simple fixes like relays or wiring repairs, to $300-800 if BCM or PCM replacement is needed. Diagnostic time typically adds $100-150.

Q: Will disconnecting the battery fix P1626?

Disconnecting the battery may temporarily clear the code but won't fix the underlying problem. However, it's often the first step in the key relearn procedure which can resolve the issue.

Q: What causes P1626 code in GM vehicles?

Common causes include faulty ignition switch, damaged BCM or PCM, corroded wiring connections, dead battery, or failed key programming. Sometimes a simple key relearn procedure resolves the issue.

Abstract

GM error code P1626 indicates that the theft deterrent fuel enable signal has been lost, meaning your vehicle's anti-theft system cannot communicate properly with the fuel injection system. This critical error will prevent your engine from starting or cause it to shut down immediately after starting.