Conditions for Running the DTC
WARNING: This page is about a different car, the 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Condition 1
- Before the ECM can report DTC P2270 failed, DTCs P0443, P0458, and P0459 must run and pass.
- DTCs P0036, P0037, P0038, P137, P0138, P0140, P0141, P0301-6, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0455, P0461, P0462, P0463, P0496, P2177, P2178, P2187, and P2188 are not set.
- The engine is operating.
- The rear heated oxygen sensor is at operating temperature for more than 10 seconds.
- The HO2S 2 is in closed loop.
- The mass air flow (MAF) sensor is between 8-33 g/s.
- DTC P2270 runs continuously once the above conditions are met.
Condition 2
- Before the ECM can report DTC P2270 failed, DTCs P0443, P0458, and P0459 must run and pass.
- DTCs P0036, P0037, P0038, P137, P0138, P0140, P0141, P0301-6, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0455, P0461, P0462, P0463, P0496, P2177, P2178, P2187, and P2188 are not set.
- The engine is operating.
- The HO2S 2 heating is stable for more than 10 seconds.
- The HO2S 2 is more than a calculated temperature for at least 30 seconds.
- The mass air flow (MAF) sensor is more than 17 g/s.
- DTC P2270 runs continuously once the above conditions are met.