Where is the other connection to the o2 sensor located at on my 1991 Honda Accord I put the sensor on but now I’m having trouble locating the connector on the other end

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Hope this helps.

locate your cat converter on your exhaust system and behind it going towards back of car u will see a wire connection going into the exhaust system tube thats ur o2 sensor

Hi again Sharon:
On 1991 Honda Accord 2.2L FI 4cyl the Oxygen Sensor is located under hood, center, front engine area, mounted in exhaust manifold (Except EX model).




A special socket is used to remove the oxygen sensor. Note the slot cut into the side of the socket.

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Sounds like your O2 sensor is malfunctioning. When the check engine light comes on, the computer goes into a preset mode bypassing the O2 sensor and that's why it suddenly runs good. Have the O2 sensor checked. You can also have the trouble codes read and they should point you in the same direction.

The oxygen sensor is located in the exhaust manifold.

1991 Honda Accord 2.2L FI 4cyl the Vehicle Speed Sensor is located mounted on transmission.

Hope help with this (remember rated this help).

1991 Honda Accord 2.2L FI 4cyl
The Oxygen Sensor is located under hood, driver side, rear engine area, below exhaust manifold flange, mounted in exhaust pipe.
Application: EX model

Good luck.

There's one located directly after your catalytic converter and the other one is located before your catalytic converter (somewhere between your headers and that cat)

The o2 sensors because the car may have more than one, are located before the catalic converter, they look like spark plugs with 3 or more cables running from the top, scan the car to check for other codes.

Further clarification on the O2 sensor location: It is in the exhaust pipe, under the center of the car, on top of the pipe, just aft of the oil filter.