Check Engine Light

Tiny
JGONZO2398
  • MEMBER
  • 2008 HONDA ACCORD
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 132,000 MILES
Another day and another issue. Any guesses as to what the specific cause may be?
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Sunday, April 17th, 2022 AT 4:22 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
In most cases, the catalytic converter is bad. Are there any drivability issues related to the code or has the check engine light simply turned on?

Also, there are products that are designed to help with this type of issue. I normally wouldn't use them, but I have heard they have worked. It's just a thought.

Note: the code is for bank 2 only, so let me know if there are any other codes present.

Take care,

Joe
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Sunday, April 17th, 2022 AT 9:58 PM
Tiny
JGONZO2398
  • MEMBER
No other codes present, and I have not noticed any drivability issues whatsoever. Some possible issues I saw online were a bad oxygen sensor or a clogged catalytic converter.
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Monday, April 18th, 2022 AT 6:35 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
A faulty O2 sensor will set a code before this code would have appeared. That's why I asked if other codes were present. Also, if the converter is partially plugged, you would notice drivability issues such as a loss of power, poor idle, stalling, and the list goes on.

Here is a link that explains the most common symptoms of a faulty converter:

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

By chance, do you have a live data scan tool? If you do, I would like you to watch the O2 sensor voltages and let me know what they do. They should be changing. (If it stays constant at one voltage), the sensor is bad. In that case (still sends a signal but is inaccurate) the P0420 could be a false negative.

Let me know.

Joe
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Monday, April 18th, 2022 AT 2:10 PM
Tiny
JGONZO2398
  • MEMBER
One thing I just noticed is that the check engine light went away. Should I just wait and see if it comes back then read the code again? And I do not believe my reader is a live data scan.
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Monday, April 18th, 2022 AT 2:51 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Absolutely wait. I'm interested in knowing if it comes back, so let me know. Also, let me know if any of the symptoms identified in the aforementioned link seem to mirror any of the symptoms you have.

Take care of yourself,

Joe
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Monday, April 18th, 2022 AT 8:48 PM
Tiny
JGONZO2398
  • MEMBER
I will definitely keep you updated. Thank you
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Monday, April 18th, 2022 AT 8:50 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Thanks. It truly helps others in the future that are experiencing the same issues. We appreciate your findings.

Take care,

Joe
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Monday, April 18th, 2022 AT 8:53 PM

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