I recently installed a new cat on my 1998 nissan maxima. No it was not an RT. Shortly after the check enging light came on and I pulled the above error code. Does this error code signify the cat being the problem. My mechanic said that putting this brand Cat would set the enging light off and I should only install the RT cat. Was he correct? I did reset the chip once and it went off again after about 125 miles.

Thanks
Paul

 

Diagnostic Trouble Code 0702 points to a problem with the three-way Catalytic Converter.

The Cat is one of the principal components of the emissions control system. The Engine Control Module monitors the signals from the two front Oxygen Sensors and the one rear Oxygen Sensor. The signal frequency of each sensor indicates something about the condition of that sensor. A comparison of the frequency of the front sensors with the rear sensor indicates something about the condition of the Cat.

This malfunction was detected when the ratio of the signal frequency from the right bank front Oxygen Sensor to the signal frequency of the rear Oxygen Sensor exceeded a critical threshold value. This indicates that the Cat does not have enough oxygen storage capacity. The right cylinder bank is also called the rear bank. It is cylinders 1,3,5. Possible causes of this DTC include ...
- Three-way catalyst
- Exhaust tube
- Intake air leaks
- Fuel injectors
- Spark plugs
- Ignition timing

 

Thanks Daniel

It must be the cat I installed from WSP. They say they have sold it to others with no problems but the guys at Avalon Racing sid it would set off the ENgine light. Guess I should put the old one on or get the RT Cat.

Thanks for the heads up.

Paul