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1999
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Golf (1J1) L4-1.9L DSL Turbo (ALH)
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A L L Diagnostic Trouble Codes ( DTC )
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P Code Charts
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P1556
P1556
P1556/VAG 17964 = Charge Pressure Control Negative Deviation. Check Wastegate bypass regulator.
[1]
[2]
Output Diagnostic Test Mode (DTM)