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  1. 1995 B4000 SE 4x4 - OBD 2 codes displayed

    I plugged my OBD 2 scanner into the plug on my 1995 B4000 SE 4x4 4.0 OHV I got these codes: P0500 Vehicle Speed Sensor A Malfunction P0141 O2 sensor Heater Malfunction B1 S1 P0155 O2 sensor Heater Malfunction B2 S1 P1151 Lack of upstream heated O2 sensor _______switch; indicates lean...
  2. 99 Ranger 4.0L P1151 help

    My Ranger has had a check engine on for a while now and I finally have another car that I can drive so I can take this apart and fix it. I have done the scans and got a P1151 code. I have tried looking for a vacuum leak with carb cleaner but have had no luck. Could somebody post a picture to...