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Question # 49

OBD-II shows P0171 “System Too Lean Bank 1.” Fuel pressure normal, trims positive. Smoke test reveals no leaks. What is MOST likely?

Options:

A.

Faulty upstream O₂ sensor

B.

Restricted injector on Bank 1

C.

Stuck-open EGR valve

D.

Faulty MAF sensor

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T Series Overview

Name Automotive Service Excellence: Medium-Heavy Truck series
Code T Series
Vendor Skilled Trades
Certification ASE

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