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P0156 Diagnostic Trouble Code Discussion for December 2005

Heated Oxygen Sensor (Bank 2 Sensor 2) Closed Loop Fuel Control

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Trouble Ticket Help Requests for DTC P0156
Help Request Posted
1998 Mercury Mountaineer 4.0L Poor Idle Quality, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: 4M2ZU54E4W
P0156: O2s circuit B2S2. The truck sat for 2 years after it was hit in the D/S front then it was fixed and it was running bad and not wanting to idle the body shop replaced the spark plugs and wires. I then got the truck it had mis fire code for every cylinder and the Po171 and P0174,...
December 06, 2005