Possible Fault Causes
Sensor inactive, Open circuit in VG or IP wire, Catalyst contaminated (rich exhaust gas at O2 sensor during overrun injection deactivation); oil or gasoline in exhaust gases during overrun injection deactivation
Sensor inactive, Open circuit in VG or IP wire, Catalyst contaminated (rich exhaust gas at O2 sensor during overrun injection deactivation); oil or gasoline in exhaust gases during overrun injection deactivation