P1092 Diagnostic Code for M54 Engine: Too Rich or Too Lean? Clarifying the Bentley Manual Discrepancy

I've been consistently receiving the P1092 diagnostic code along with P0430 on my M54 engine. I'm aware that the catalytic converter is failing, as the P0430 code has appeared frequently over time. My main concern is the conflicting information about the P1092 code: the Bentley manual lists it as 'too rich bank 1,' while numerous online sources describe it as 'too lean bank 2.' Is this a typo in the Bentley manual, or am I misinterpreting the diagnostic definition? I'd like to confirm whether the P1092 code should be interpreted differently based on engine bank configuration and official documentation.