P1148 AUDI HO2S21 System Too Rich

Possible causes

– Faulty HO2S21
– Fualty Mass Air Flow (MAF) Sensor
– HO2S21 harness is open or shorted
– HO2S21 circuit poor electrical connection

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

AUDI Related P1148 code

2002 AUDI A4 Engine And Engine Cooling:engine

2002 AUDI S4 Engine And Engine Cooling:engine

2002 AUDI TT Engine And Engine Cooling:engine

2003 AUDI A4 Engine And Engine Cooling:engine

2003 AUDI S4 Engine And Engine Cooling:engine

2003 AUDI TT Engine And Engine Cooling:engine