This car has a check engine light on with a P0135 code. Customer States they replaced three o2 sensors and the ecm...good luck! After hours of diag Ifound that a rookie mechanic mistake was made from the beginning. In the end , the diagnostic was a success! Went too far with a dmm checking circuits when a rookie mistake was made. Overlooked a detail and wasted time.
00:00 Intro
02:00 P1000 P0135 O2 Sensor Code OBD1 Wideband O2 Air Fuel Ratio Sensor
07:00 AllData Wiring Diagram O2 Sensor Ford B1S1
22:15 Ford Mass Air Flow Sensor monitors air and uses Fuel Trims to maintain air fuel ratio, Vacuum Leaks found
34:44 Digital Multi Meter Test Leads Fluke 88
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Tool Picks Found on Amazon:
Walnut Blaster Used in this video:
https://amzn.to/3xSdwzq Walnut Sand DE-Carbon Cleaner HTS558 Walnut Blaster
Mountain 5-Piece Metric Double Box Universal Spline Reversible Ratcheting Wrench Set; 8 mm - 18mm, 90 Tooth Design, Long, Flexible, Reversible; MTNRM6
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”Intro Music by Karl Casey @ White Bat Audio”
Thanks to Jesse for making the intro and graphic for us to enjoy!!