Conditions for Running the DTC (w/LLT)

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Before the ECM can report DTC P2097 or P2099 failed, DTCs P0030, P0031, P0032, P0050, P0051, P0052, P0131, P0132, P0133, P0135, P0137, P0138, P013A, P013C, P013E, P014A, P0140, P0141, P0151, P0152, P0153, P0155, P0157, P0158, P0160, P0161, P2177, P2178, P2179, P2180, P2187, P2188, P2189, P2190, P2231, P2232, P2234, P2235, P2270, P2271, P2272, and P2273 must run and pass.
DTC P0100, P0101, P0102, P0103, P0420, P0430, P0442, P0443, P0455, P0458, or P0459 is not set.
The engine speed is 1,080-3,480 RPM.
The engine load is 17-20 percent and steady.
The closed loop fuel control is active for greater than 1 seconds.
The front and rear HO2S are in Closed Loop.
The calculated exhaust gas temperature is greater than 250°C (482°F).
DTCs P2097 and P2099 run continuously when the conditions above have been met for greater than 200 seconds.