Page 252 - Foton Workshop Manual - Aumark (BJ1099)
P. 252
11-26 ENGINE CONTROL SYSTEM - REAR OXYGEN SENSOR
OVERHAUL
The rear oxygen sensor is only used in electronic fuel injection system with OBD function.
It detects whether the exhaust exceeds standard. The rear oxygen sensor has the same
technical conditions and material object with the front oxygen sensor, but has different
installation site.
Page 252