DTC P1128 Alfa Romeo
Closed Loop Fueling Not Achieved - Bank 1 Upstream
Closed Loop Fueling Not Achieved - Bank 1 Upstream
Description
Closed Loop enable conditions have been met and the O2 Sensor has not been in closed loop control, at least once.
Cause and Solution
O2 Sensor 1 1 Wiring Open Or Shorted
Restricted Fuel Supply Line
Fuel Pump Inlet Strainer Plugged
Fuel Filter Pressure Regulator
Fuel Pump Module
Map Sensor Operation
Ect Sensor Operation
O2 Sensor
Fuel Filter Pressure Regulator
Video Guide
Diagnostic Info
- DTC Code: P1128
- Brand: Alfa Romeo