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P1557 Diagnostic Trouble Code Discussion for July 2008

Battery Module Temperature Sensor Signal 3 Circuit Low Voltage

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Trouble Ticket Help Requests for DTC P1557
Help Request Posted
1998 Audi A4 1.8L Hesitation, Poor Fuel Economy VIN: WAUCB28D3W
P1557: charge pressure deviation intermitent. i cant find any kind of boost sensor in the computer, i have vag com. i think it must be a fairly common problem as i have 2 customers that have not complained but their cars are slower than most 1.8t that i work on. thanks for your help. chris
July 10, 2008