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 P2270 or P2272 failed, DTCs P0036, P0037, P0038, P0056, P0057, P0058, P0137, P0138, P0140, P0141, P0157, P0158, P0160, P0161, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0443, P0458, and P0459 must run and pass.
DTC P0461, P0462, P0463, P2066, P2067, or P2068 is not set.
The engine is operating.
The ignition voltage is greater than 10 volts.
The rear HO2S are at operating temperature for greater than 10 seconds.
The fuel injectors are enabled.
The long term fuel control is enabled.
The mass air flow (MAF) sensor is greater than 10 g/s.
The MAF sensor is between 6-33 g/s for greater than 3 seconds during the intrusive test.
The accumulated air flow into the engine is greater than 15 grams during the fuel cut-off event.
DTC P2271 and P2273 runs continuously once the above conditions are met.