Review on Denso 234 9040 Fuel Ratio Sensor by Gary Shakeone

I got my first CEL on my 2004 Honda Accord (190,000 miles) and it ended up with P1157 which is an upstream O2 sensor failure (bank 1 sensor 1). The mechanic called 250 for the repair and I saw that online it seemed easy so I installed it myself. This is an OEM O2 sensor that Honda uses. It looked the same and was exactly the same length. The product contains an anti-seize lubricant that should be applied to the threads when installing a new sensor. A low profile O2 sensor socket should be used to avoid removing the protective cover around the sensor. The sensor is located in front of the catalytic converter on the exhaust pipe. It is covered with a heat shield. Approximately 33 ft-lbs of torque should be used. After installing and resetting my ECU by disconnecting the negative cable from the battery for 10 seconds, the check engine light went off and stayed on. (You don't need to reset the ECU, the check engine light will go off automatically after a few driving sessions). In all, you saved about $150 for 15 minutes of work. If you don't feel comfortable doing it yourself, buy the part online and take it to a trusted mechanic. Most mechanics charge 120-130 just for the part so you save money and also get a better brand as most mechanics don't buy OEM and usually use cheaper sensors like Bosch.