P2198 Diagnostic Trouble Code Discussion for February 2016
Heated Oxygen Sensor (Bank 2 Sensor 1) Stuck Rich
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| Help Request | Posted | |
| 2007 Ford Expedition XLT 5.4L rich VIN: 1FMFU15577 P2198: o2 sensor excess rich signal b2s1. I have this expedition with an extreme rich condition. Both front o2 sensors are almost always at 900mv. When you first start the engine, the rear sensors start at a low voltage, and climb to 900mv. Unplug the hose from the brake booster, and the o2 sensors al... |
February 04, 2016 |
