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--- >>> P0171 | P0174 System Too Lean Bank 1 Bank 2

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Old 05-31-2008, 07:50 AM
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Default --- >>> P0171 | P0174 System Too Lean Bank 1 Bank 2

Anyone had the same issue?


Bentley says:
Exhaust system

Check exhaust system for proper seal

Check fuel injectors
Injection quantity, proper seal and spray pattern of fuel injectors, checking

Fuel Supply system

Fuel pressure regulator and residual pressure checking
checking


Checking intake system for leaks (unmetered air)

Secondary Air Injection (AIR) system

Checking secondary air system for proper seal
Combination valves for Secondary Air Injection (AIR) system, checking function and for proper seal
Secondary Air Injection (AIR) solenoid valve -
Vacuum system

Vacuum system, checking for leaks
Old 05-31-2008, 10:14 AM
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Yep, it was a cracked vacuum valve - P/N 078-611-933-B. Good luck
Old 05-31-2008, 12:26 PM
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awww - where do I find it? Can I DIY it?
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