【エンジン警告ランプ】140km走っても再発しないP0420の罠！安易にO2センサーを交換してはいけない理由 最終章 #o2センサー #触媒劣化 #関西エコアープ
O2センサー屋の社長
3,781 views
The engine warning light illuminated, and the diagnostic tool displayed error code P0420 (catalytic converter degradation).
Many people immediately resort to the easy solution of replacing the O2 sensor, but this often leads to a complete waste of money.
As professionals who deal with O2 sensors daily, we don't want you to make the mistake of misdiagnosing the cause and performing a meaningless sensor replacement.
This time, we thoroughly investigated the "trap of post-error clearing behavior" in a vehicle with clearly degraded catalytic converters.
Amazingly, after clearing the error, the check engine light never illuminated even once, even after driving 140km on both local roads and highways.
"See, it's fixed after all!"
If you thought that, that's precisely the real danger of P0420: the "trap of the ECU (Engine Control Unit)'s judgment logic."
Why didn't the error appear after 140km?
Why is a simple sensor replacement pointless?
A professional will completely expose the truth behind the issue, based on absolute evidence: oscilloscope waveform data.
The O2 sensor is not the culprit.
It's merely a "snitch" that indicates an abnormality.
Before you lose a lot of money by replacing unnecessary parts,
be sure to take this verification result into your mind.
[Video Table of Contents (Timestamps)]
00:00 Final Day High-Speed Reproduction Test Part 1
01:38 High-Speed Reproduction Test Part 2
04:41 New Catalytic Converter Replacement
05:11 Waveform Confirmation After Catalytic Converter Replacement
06:20 Summary: Why You Shouldn't Easily Replace Sensors
#o2sensor #kea #KansaiEcoArp #Tanto #CatalyticCatalyticConditionerDegradation #p0420
2 Comments
時間を掛けて検証した成果ではなく、発見はほとんど偶然。
【エンジン警告ランプ】140km走っても再発しないP0420の罠！安易にO2センサーを交換してはいけない理由 最終章 #o2センサー #触媒劣化 #関西エコアープ
O2センサー屋の社長
3,781 views
The engine warning light illuminated, and the diagnostic tool displayed error code P0420 (catalytic converter degradation).
Many people immediately resort to the easy solution of replacing the O2 sensor, but this often leads to a complete waste of money.
As professionals who deal with O2 sensors daily, we don't want you to make the mistake of misdiagnosing the cause and performing a meaningless sensor replacement.
This time, we thoroughly investigated the "trap of post-error clearing behavior" in a vehicle with clearly degraded catalytic converters.
Amazingly, after clearing the error, the check engine light never illuminated even once, even after driving 140km on both local roads and highways.
"See, it's fixed after all!"
If you thought that, that's precisely the real danger of P0420: the "trap of the ECU (Engine Control Unit)'s judgment logic."
Why didn't the error appear after 140km?
Why is a simple sensor replacement pointless?
A professional will completely expose the truth behind the issue, based on absolute evidence: oscilloscope waveform data.
The O2 sensor is not the culprit.
It's merely a "snitch" that indicates an abnormality.
Before you lose a lot of money by replacing unnecessary parts,
be sure to take this verification result into your mind.
[Video Table of Contents (Timestamps)]
00:00 Final Day High-Speed Reproduction Test Part 1
01:38 High-Speed Reproduction Test Part 2
04:41 New Catalytic Converter Replacement
05:11 Waveform Confirmation After Catalytic Converter Replacement
06:20 Summary: Why You Shouldn't Easily Replace Sensors
#o2sensor #kea #KansaiEcoArp #Tanto #CatalyticCatalyticConditionerDegradation #p0420
交換前のセンサー1とセンサー2の波形がほぼ同じでしたね
紛らわしいトラブルコード出してくるんでそこから点検するようにしてます