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I have a b20b motor with p8r heads in my 97 lx. . . i keep gettin a code 41 which is the o2 sensor, i replaced the sensor in front of the cat with an OEM replacement, and still gettin a check engine light. i was under the impression that the sensor behind the cat wouldn't affect the PCM or ECU, secondly i cant even locate the second sensor is it in the cat?

Submitted: 450 days and 9 hours ago.

Category: Honda

Value: $9

Status: AWAITING CUSTOMER ACTION

Posted by John G 450 days and 9 hours ago.

Answer

Hi, I can help. The 41 , or p0141 is a problem with the secondary o2 sensor heater circuit.
The primary sensor in right in the exhaust manifold originally and the secondary is screwed into the cat.
If you dont have a secondary sensor installed thats the problem.
It also monitors the catalytic convertor operation so it will eventually set a p0420 code too.

450 days and 9 hours ago.

Reply

The secondary is screwed into the cat, visible from the outside of the cat?
where can i find the secondary o2 heater circuit?

Accepted Answer

Yes its visible in the cat. from the outside.
The sensors have a heater buit in and they burn out all the time.
Its usually not anything else.

Expert:	John G
Pos. Feedback:	99.4 %
Accepts:	2124
Answered:	12/16/2008

Honda Technician

Dealership tech since 1982. ase and Honda Master tech

450 days and 9 hours ago.

Reply

well john g thank you very much i think i found my problem, i lack a secondary o2 sensor : ) . . . what is the process of installing one and how much does something like that cost?

Posted by John G 450 days and 9 hours ago.

Answer

It just needs to be screwed in and plug in the wire connector.
Retail on a new Honda sensor is 264 and change

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The secondary is screwed into the cat, visible from the outside of the cat? where can i find the secondary o2 heater circuit?

Accepted Answer

Yes its visible in the cat. from the outside.The sensors have a heater buit in and they burn out all the time.Its usually not anything else.

Reply

well john g thank you very much i think i found my problem, i lack a secondary o2 sensor : ) . . . what is the process of installing one and how much does something like that cost?

Answer

It just needs to be screwed in and plug in the wire connector.Retail on a new Honda sensor is 264 and change

Related Honda Questions

The secondary is screwed into the cat, visible from the outside of the cat?
where can i find the secondary o2 heater circuit?

Yes its visible in the cat. from the outside.
The sensors have a heater buit in and they burn out all the time.
Its usually not anything else.

It just needs to be screwed in and plug in the wire connector.
Retail on a new Honda sensor is 264 and change