O2 sensor testing (fixed lean) P0174, P0154, P0155 - Mitsubishi

Описание: This video is a great demonstration of the quick and effective testing methods I teach for O2 sensors. No service information or wiring diagrams required here! All methods shown apply to any four-wire zirconia O2 sensor you’ll come across in the field, not just Mitsubishi.

Engine Performance Diagnostics chapter 5

Symptoms
check engine light (P0174, P0154, P0155, P0138, P0303)

Fix
replaced the bank 2 sensor 1 O2 sensor

Tests shown
using scan data (O2 signal and fuel trims) to evaluate O2 sensor performance
how to use a downstream O2 signal to check if the upstream sensor is lying
how to use rapid throttle snaps to create a rich condition without propane/carb clean
how to use scan data while unplugging sensors to identify sensor locations
using sensor-side O2 wire colors to identify signal and heater circuits without a diagram
checking for a bias voltage on a O2 sensor signal circuit
how to perform an O2 signal circuit integrity test
measuring voltage levels on an O2 signal circuit during the integrity test

Tools used
scan tool
graphing multimeter

Playlist
(Chapters 4 and 5) Fuel Trim and Oxygen Sensor Testing
   • (Chapters 4 and 5) Fuel Trim and Oxygen Se...  

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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
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Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.