DTC Advanced Diagnostics: P2272: General Description
High output performance monitor
Low output performance monitor
The front secondary heated oxygen sensor (secondary HO2S (bank 2, sensor 2)) detects the oxygen content in the exhaust gas downstream of the front warm up three way catalytic converter (WU-TWC) (bank 2) during stoichiometric air/fuel ratio feedback control. The powertrain control module (PCM) controls the air/fuel ratio from the front air/fuel ratio (A/F) sensor (bank 2, sensor 1) output voltage so that the front WU-TWC (bank 2) efficiency is optimized. When power is applied to the front secondary HO2S (bank 2, sensor 2) heater, if the front secondary HO2S (bank 2, sensor 2) output continues to be low (lean) during feedback control, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 22 seconds or more*, 6 seconds or more** |
| DTC Type | Two drive cycles, MIL on |
*: High output performance monitor
**: Low output performance monitor