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P0131 Diagnostic Trouble Code Discussion for April 2013

Air Fuel Sensor (Bank 1 Sensor 1) Circuit Low Input (Lean Shift)

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Trouble Ticket Help Requests for DTC P0131
Help Request Posted
2003 Dodge Ram 2500 5.7L MIL Lamp on VIN: 1D7KU28D03
P0131: o2 upstream circuit voltage low. Day after doining oil change customer came back with check engine light on. Code Po131 circuit voltage too low 02 sensor. Replaced with denso o2 sensor. I now have a new code Po171 system too lean. Replaced 02 sensor with bosch this time . Still have code Po17...
April 10, 2013