[ntippet]

Hmm that is Odd, Bank 2 would be the drivers side if the vehicle was PZEV EJ259 (Cali Emissions).
The 2.5L did receive separate exhaust banks, it was not just for H6 models.

Can you verify this code with a 2nd scanner?

Your exhaust manifold looks like this correct?

PZEV Model EJ259:

 

[ntippet]

Yeah I thought for a moment a different ECM may have been installed, but like you said, there would be much much more wrong than this.

I would take cardoc's advice, its most likely a P0032.

See if you can get a 2nd scan, not sure why its pulling a P0052.

FreeSSM doesn't really use different definitions, that and it doesn't get updated much.