Fuel System - MIL ON DTC P0300/P030X/Lean Condition
01 MIL on, gasoline quality (DTC P0300 or P030x, lean condition DTCs)
00 10 01
2014753/7
February 5, 2010.
Supersedes Technical DIAGNOSIS AND REPAIR Group 00 number 09-04 dated April 20, 2009 for reasons listed below.
Affected Vehicles
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Condition
The use of contaminated gasoline or gasoline with a low content of deposit control additives may result in one or more of the following conditions:
^ Excessive accumulation of deposits on intake valves, intake manifold, fuel injectors and combustion chambers.
^ Engine runs rough after cold start.
^ Excessive engine cranking time.
^ Hesitations while driving.
^ Rough engine idle.
^ Reduced engine performance.
^ Poor fuel economy.
Conditions may be severe enough to illuminate the MIL in conjunction with storage in the ECM data memory of DTCs for misfire (example: P0300,
P030x) and / or lean fuel system (example: P0171, P0174, P1128, P1130, P1136, P1138).
Technical Background
^ Condition may be caused by use of contaminated gasoline.
^ Condition may be caused by use of gasoline with a low content of deposit control additives.
Production Solution
Not applicable.
Service
If use of contaminated gasoline is suspected:
Consider advising the customer to change gasoline source (brand/gas station). Contaminated gasoline may exhibit one or more of the following
characteristics:
^ May have unique color and odor.
^ May contain undissolved water.
^ May contain sediments and suspended matter.
^ May appear cloudy and (after settling) may show signs of separation.
Repair:
Gasoline additive G 001 700 03 or G 001770 A2 can be used for removal of existing carbon deposits from:
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^ MPI engine
^ Injectors.
^ Combustion chambers.
^ Intake valves.
^ FSI engine
^ Injectors.
^ Combustion chambers.
Tip: For removal of carbon deposits from intake valves of FSI engines, refer to TSB 2019948.
Mix the additive with gasoline directly in the full fuel tank following the mix ratio. For example, 60 ml per 30 liters gasoline, 150 ml per 20 gallons
of gasoline.
Tip: This TSB is informational only and not applicable to any Audi warranty. The use of gasoline additive G 001 700 03 or G 001770 A2 is not
reimbursed under warranty.
If use of gasoline with a low content of deposit control additives is suspected:
Recommend to the customer the exclusive use of TOP TIER Detergent Gasoline. These products provide improved deposit control performance.
Current TOP TIER Gasoline retailers offering this product in all their octane grades include the following brands:
^ QuikTrip
^ Chevron
^ Conoco
^ Phillips 76
^ Shell
^ Entec Stations
^ MFA Oil Company
^ Kwik Trip/Kwik Star
^ The Somerset Refinery, Inc.
^ Chevron-Canada
^ Aloha Petroleum
^ Tri-Par Oil Company
^ Shell-Canada
^ Texaco
^ Petro-Canada
^ Sunoco-Canada
Tip: For more information on TOP TIER Detergent Gasoline, please see www.toptiergas.com.
Warranty
This TSB is informational only and not applicable to any Audi warranty. The use of gasoline additive G 001 700 03 or G 001770 A2 is not
reimbursed under warranty.
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service
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manuals for the latest information.
