Jetta L4-2.0L (AEG) (2000)
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Fuel extraction unit VAG 1433 A (or equivalent, approved fuel cart)
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Switch off ignition.
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Drain fuel tank completely using fuel extraction unit, then fill with 7 liters (1.85 gallons) of fuel.
WARNING!
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Fire hazard. DO NOT smoke or work near heaters or have anything in the area that can ignite fuel.
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Always drain fuel from fuel tank using an approved fuel cart.
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Wear fuel-resistant gloves whenever working with open parts of the fuel system.
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Connect scan tool VAG 1551, select operating mode 1 "Rapid data transfer", switch on ignition and enter address word 17 "instrument cluster".
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Press -Q- button to confirm input.
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Press -> button until "Select function" appears in display.
Indicated on display:
Rapid data transfer
HELP
Select function XX
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Press buttons -1- and -0- to select "Adaptation" function 10.
Indicated on display:
Rapid data transfer
Q
10 - Adaptation
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Press -Q- button to confirm input.
Indicated on display:
Adaptation
Enter channel number XX
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Press buttons -3- and -0- to select adaptation "channel 30".
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Press -Q- button to confirm input.
Indicated on display:
Channel 30 Adaptation 128
->
<-1 3->
NOTE:
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At least 60 seconds must pass between adding fuel and reading fuel gauge.
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Before this time passes, the fuel gauge reading is unreliable due to the movement of the added fuel.
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Using button -1-, the adaptation value can be decreased as low as 120, using button -3-, the value can be increased as high as 136, e.g. 130.