DTC P0135/EFI 521 & DTC P0141/EFI 522 Volvo V70 I

1. DTC P0135/EFI 521 Front HO2S Preheating - Low/High
2. DTC P0141/EFI 522 Rear HO2S Preheating - Low/High

For connector terminal identification (Схема №14)- (Схема №24) and ENGINE PERFORMANCE in appropriate SYSTEMS WIRING DIAGRAM article in ELECTRICAL as follows

1. «SYSTEM WIRING DIAGRAMS - C70»(ref-118611)
2. «SYSTEM WIRING DIAGRAMS - S70»(ref-119004)
3. «SYSTEM WIRING DIAGRAMS - V70»(ref-119777)

For component locations, see

COMPONENT LOCATIONS