DTC P1E00: Registration Fault Of Authentication Unit
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
DTC detecting condition:
The communication key of the central gateway control module does not match other control modules after performing module registration (verification).
Trouble symptom:
Authentication communication with engine and CVT is not possible. (Communication error occurs in modules that conduct MAC communication with ECM and TCM. Related failures occur.)
NOTE:
Refer to DTC B1E00 for diagnostic procedure. Ref. to CENTRAL GATEWAY (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC B1E00 REGISTRATION FAULT OF AUTHENTICATION UNIT