Check engine light is on, possible O2 sensor issue

Tiny
GIZMO3559
  • MEMBER
  • 1998 HONDA ACCORD
  • 2.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 2,345,789 MILES
I have the car listed above DC. My check engine light on, when test for the codes it's said the o2 sensor for heater. I change the one under the hood, but when I went to change the one under the car. I couldn't find it. There is no catalytic converter. What do I do to turn the check engine light off?
Monday, April 27th, 2020 AT 3:14 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Sounds like someone removed the catalytic converter and there should be an O2 sensor at the catalytic converter. If there is no sensor, then there is a wire connector there for hooking one up. That would be the reason for the check engine light because it sees an open circuit for the downstream O2 sensor.

https://www.2carpros.com/articles/how-an-oxygen-sensor-works

I attached a picture of where the connector is located and where the sensor should be.

I would install the converter as it should be there by federal law and then hook up the sensor.

Roy
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Monday, April 27th, 2020 AT 3:47 AM

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