DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1): Specification
HO2S SPECIFICATION
| HO2S FR | Normal Parameter (at 1300 RPM after warming up) | |
| Rich | Lean | |
| 0.6~1.0V | 0~0.4V | |
| Hi-scan Data display | Engine condition | |
| When deceleration suddenly from 4000 RPM | 200 mV or lower | |
| When engine is suddenly raced | ||
| HO2S RR | Normal Parameter (at 2000 RPM after warming up) | |
| Signal Voltage | Normal Parameter (at 2000 RPM after warming up) | |