MIL with two lean codes, 16555 and 16558
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Audiworld Junior Member
Joined: Jun 2002
Posts: 55
Likes: 0
MIL with two lean codes, 16555 and 16558
Where I should start to check? Mine is 96' A6 wagon with 115k miles. Thanks a lot.
Alex
--------------------------
Address 01: Engine
Controller: 8D0 906 266 B
Component: 2,8l V6/2V MPI OBD2 D01
Coding: 10242
Shop #: WSC 02324
2 Faults Found:
16555 - Fuel Trim: System Too Lean: Bank 1
P0171 - 93-00 - Unknown Error Elaboration
16558 - Fuel Trim: System Too Lean: Bank 2
P0174 - 93-00 - Unknown Error Elaboration
Readiness: N/A
Alex
--------------------------
Address 01: Engine
Controller: 8D0 906 266 B
Component: 2,8l V6/2V MPI OBD2 D01
Coding: 10242
Shop #: WSC 02324
2 Faults Found:
16555 - Fuel Trim: System Too Lean: Bank 1
P0171 - 93-00 - Unknown Error Elaboration
16558 - Fuel Trim: System Too Lean: Bank 2
P0174 - 93-00 - Unknown Error Elaboration
Readiness: N/A
AudiWorld Super User
Joined: Jan 2003
Posts: 6,994
Likes: 204
From: Lake Tapps, WA
Posible causes for these two DTCs....
* Intake air leak between MAF sensor -G70- and engine.
* Air leak in exhaust system before H02S -G39-
* Fuel system pressure too low due to fualty fuel pump, plugged fuel filter, or faulty fuel pressure regulator.
* EVAP canister purge regulator valve -N80- sticks.
* Air leak in exhaust system before H02S -G39-
* Fuel system pressure too low due to fualty fuel pump, plugged fuel filter, or faulty fuel pressure regulator.
* EVAP canister purge regulator valve -N80- sticks.
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