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P1131 Diagnostic Trouble Code Discussion for February 2008

Heated Oxygen Sensor (Bank 1 Sensor 1) Indicates A/F Ratio Too Lean

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Trouble Ticket Help Requests for DTC P1131
Help Request Posted
1999 Ford Contour LX 2.0L MIL Lamp on VIN: 1FAFP6534X
P1131: lack of h2s1 1 switch . sensor indicates lean. ... code p1131 h2s1 switch. i replace the hose go to intake manifold due to it cracked and cleaned the maf sensor. now it back with the same code. the owner said hesitation under for second then the light come on. i monitor the data on scanner. o2 switching go...
February 23, 2008