Possible causes
– Faulty Mass Air Flow (MAF) sensor
– Low fuel pressure
– Vacuum leak on engine
– Faulty HO2S bank 1
– Low fuel pressure
– Vacuum leak on engine
– Faulty HO2S bank 1
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
AUDI Technical Service Bulletins for P1128 code
2000 AUDI A8 ENGINE AND ENGINE COOLING:ENGINE
2001 AUDI A6 ENGINE AND ENGINE COOLING:ENGINE
2001 AUDI A8 ENGINE AND ENGINE COOLING:ENGINE
2002 AUDI A6 ENGINE AND ENGINE COOLING:ENGINE
2002 AUDI A8 ENGINE AND ENGINE COOLING:ENGINE
2000 AUDI QUATTRO ELECTRICAL SYSTEM
2001 AUDI QUATTRO ELECTRICAL SYSTEM
2002 AUDI QUATTRO ELECTRICAL SYSTEM
2002 AUDI A4 ENGINE AND ENGINE COOLING:ENGINE
2002 AUDI S4 ENGINE AND ENGINE COOLING:ENGINE