Chevy 4.8 Oxygen Sensor Test (fixed rich signal P0172, P0175)
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13 سال پیش
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Oxygen Sensor Test (fixed rich
Oxygen Sensor Test (fixed rich signal P0172, P0175)
These tests apply to all fuel injected systems that have oxygen sensor problems. The vehicle being tested is a 2006 Chevy Express Van with a 4.8L engine.
In this video I will be covering how to test an oxygen sensor that has a fixed rich (high volt) signal by comparing it to the downstream oxygen sensor that is on the same bank. This is a dual bank system with two separate catalytic converters and two separate downstream sensors. I will also back this test up by comparing O2 sensor voltage to tailpipe CO%.
One of the main issues you must consider when testing an oxygen sensor with a fixed rich or fixed lean signal is whether or not the sensor is faulty or if you have a mixture problem.
Symptoms:
- low power
- runs good cold
- runs good at wide open throttle
- all cylinders misfire on one side of engine
- poor gas milage
- negative fuel trim numbers (P0172, P0175)
Fix:
- replace faulty upstream oxygen sensor
Testing procedures shown:
- upstream and downstream O2 sensor comparison
- comparing tailpipe CO emission to O2 sensor voltage
- what a lean misfire looks like from the tailpipe
Tools used:
- scan tool
- gas analyser
Related videos:
- Fixed Lean O2, melted converter (O2 sensor and cat tests)
O2 sensor (fixed lean) and restricted...
- O2 sensor problem causing low power and misfire codes
How to identify a bad oxygen sensor (...
- How to diagnose multiple oxygen sensor and fuel trim codes
O2 sensor testing (fixed lean) P0174,...
- Ford O2 Sensor Testing
Ford O2 Sensor Testing - wiring tests...
- Downstream Fuel Trim (A James Danner video review)
Downstream Fuel Trim (A James Danner ...
- It's back! But is it the same problem? (1988 F-150)
1988 F150 Hesitation Problem [FIX!]
Playlist:
- (Chapters 4 and 5) Fuel Trim and Oxygen Sensor Testing
(Chapters 4 and 5) Fuel Trim and Oxyg...
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.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium https://www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
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.
These tests apply to all fuel injected systems that have oxygen sensor problems. The vehicle being tested is a 2006 Chevy Express Van with a 4.8L engine.
In this video I will be covering how to test an oxygen sensor that has a fixed rich (high volt) signal by comparing it to the downstream oxygen sensor that is on the same bank. This is a dual bank system with two separate catalytic converters and two separate downstream sensors. I will also back this test up by comparing O2 sensor voltage to tailpipe CO%.
One of the main issues you must consider when testing an oxygen sensor with a fixed rich or fixed lean signal is whether or not the sensor is faulty or if you have a mixture problem.
Symptoms:
- low power
- runs good cold
- runs good at wide open throttle
- all cylinders misfire on one side of engine
- poor gas milage
- negative fuel trim numbers (P0172, P0175)
Fix:
- replace faulty upstream oxygen sensor
Testing procedures shown:
- upstream and downstream O2 sensor comparison
- comparing tailpipe CO emission to O2 sensor voltage
- what a lean misfire looks like from the tailpipe
Tools used:
- scan tool
- gas analyser
Related videos:
- Fixed Lean O2, melted converter (O2 sensor and cat tests)
O2 sensor (fixed lean) and restricted...
- O2 sensor problem causing low power and misfire codes
How to identify a bad oxygen sensor (...
- How to diagnose multiple oxygen sensor and fuel trim codes
O2 sensor testing (fixed lean) P0174,...
- Ford O2 Sensor Testing
Ford O2 Sensor Testing - wiring tests...
- Downstream Fuel Trim (A James Danner video review)
Downstream Fuel Trim (A James Danner ...
- It's back! But is it the same problem? (1988 F-150)
1988 F150 Hesitation Problem [FIX!]
Playlist:
- (Chapters 4 and 5) Fuel Trim and Oxygen Sensor Testing
(Chapters 4 and 5) Fuel Trim and Oxyg...
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.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium https://www.scannerdanner.com/join-sc... There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
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.
13 سال پیش
در تاریخ 1390/03/25 منتشر شده
است.
57,538
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