P0141 or P0161

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 P0141 or P0161 failed, DTCs P0036, P0037, P0038, P0056, P0057, and P0058 must run and pass.
DTCs P0137, P0138, P0140, P0157, P0158, or P0160 are not set.
The engine is operating.
The ignition voltage is 10-18 volts.
The intake air temperature (IAT) is greater than -30°C (-22°F).
After the previous ignition cycle the engine OFF time was greater than 0 seconds.
The calculated exhaust temperature is 360-500°C (680-932°F), 300-550°C (572-1,022°F) for LLT.
The engine is not in decel fuel cut-off (DFCO).
The internal HO2S 2 resistance is less than 10,000 ohms.
The HO2S 2 heater is enabled fro greater than 120 seconds.
DTCs P0141 and P0161 run continuously once the above conditions are met for approximately 100 seconds.