OBD II Fault Code P0171 :

Description of Fault code P0171

REAR BANK (BANK1) FUEL SYSTEM TOO LEAN

Possible failuer P0171

• Low fuel pressure
• Fuel feed line open / leak
• Pressure regulator valve closed stuck
• Fuel filter clogged
• Fuel leak from Injector
• Using meanness fuel, improper fuel or chemical admixture
• HO2S S2 problem
• EGR valve
• Valve clearance problem
• Exhaust gas leak

Diagnostic Procedure using AutoHex II Scan Tool

• The data isn t obtained because B-CAN Frame can t be received.
• The B-CAN System doesn t actuate.

Test Conditions using AutoHex tester

• When B-CAN Data is sending

Clear Fault codes Conditions

• The data isn t obtained because B-CAN Frame can t be received.
• The B-CAN System doesn t actuate.

MIL Status

• Keyless Access Indicator ON

Note:

• AutoHex II is a professional Auto diagnostic.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex II

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