What causes GM code 46?

Worn ignition key resistor pellet Damaged key cylinder contacts Open wiring in the steering column Failed VATS decoder module

How do I fix GM code 46?

Try a spare key to rule out a worn resistor pellet Measure key pellet resistance and compare to specification Inspect column wiring for breaks from tilt wheel movement Test the VATS decoder inputs per the service manual Clear codes only after the correct key resistance is read reliably

46 Pass Key Theft Deterrent System Error

Q: What does GM code 46 mean?

GM code 46. Pass Key Theft Deterrent System Error. Applies to 1988-1995 Corvette, Camaro, Cadillac with VATS anti theft.

Make: GM (1982-1995)
Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: 1988-1995 Corvette, Camaro, Cadillac with VATS anti theft

How to read it

Code 46 reads as 4 flashes, pause, 6 flashes on the check-engine light. Jump terminals A and B on the ALDL connector with the key off, then turn the key on with the engine off and count the check-engine flashes.

What does GM code 46 mean?

46. Pass Key Theft Deterrent System Error. This code sets when your vehicle computer detects pass key theft deterrent system error.

Common causes of 46

Worn ignition key resistor pellet
Damaged key cylinder contacts
Open wiring in the steering column
Failed VATS decoder module

How to fix 46

Try a spare key to rule out a worn resistor pellet
Measure key pellet resistance and compare to specification
Inspect column wiring for breaks from tilt wheel movement
Test the VATS decoder inputs per the service manual
Clear codes only after the correct key resistance is read reliably