This code indicates a security authentication failure between the vehicle's control modules. It means a module cannot verify the digital security certificate required for secure communication or operation. This often occurs after programming attempts or due to communication network interruptions.
Recent software updates or module replacements often lack proper security initialization.
Voltage drops during module communication can corrupt security handshakes.
Damaged wiring or poor connections interrupt secure data transmission.
A body control or gateway module may have corrupted security data.
Internal memory errors prevent valid certificate storage.
Physical damage to the PCM is a rare cause compared to software or wiring issues.
No, this is frequently caused by programming issues or voltage faults. Replacing the computer is rarely the solution unless all other causes are ruled out.
It may clear temporarily, but will likely return until the security certificate is validated or reprogrammed.
Yes, voltage drops during module communication can corrupt security handshakes.
It is related, but this code specifically points to module-to-module certificate validation rather than just key recognition.