CEL on 360

Both error codes refer to the bank 1 sensor 1 o-2 sensor. the o-2 sensor has a heater element internal to the sensor to allow it to reach temp. sooner for closed loop . The code found could be :
1. the engine control computer
2. the connections/wiring
3. the sensor itself

The weak link in the system is the sensor itself more than likely the heater element has burned out. No that uncommon now a days with the Ethenol blended fuel. Ethenol has a higher flash point and we have seen an increase in sensor failure.

Daignosis would be a scanner that monitors the sensor values. Or to pin test the values at the sensor to see if the heater element has an opening or incorrect resistance. I would asume both codes are pointing to a bad sensor.

David

 

Agreed, This most likely is a fault in the O2 sensor. You definetly want to fix it ASAP, this sensor is critical to the ECU's ability to adjust the air/fuel ratio.

 

If you are reasonably handy, this can be done yourself. The Bosch O2 sensors can be purchased online, and you can typically install yourself in 20 or 30 minutes time. I have replaced mine on a couple occasions for the same codes (F355).

 

Just one connector and a threaded mount like a spark plug. Only issue is unthreading the
old one. Some will have a tendency to corrode into place and take a little effor to remove use some CRC. Second is making sure you have the bank 1 sensor not bank 2 !!

Pretty stright forward. unplug and remove old part. Install and plug in new part. Reset errors.

David

 

I believe they are 19mm...The removal trick is to cut the wire at the base of the
sensor so you can remove it with a deep socket to get a better grip.

David

 

Bank 1 is the bank that houses the 1 -3 -5 -7 cylinders.

David

 

Most auto supply / tool places sell special slotted deep sockets to facilitate the wire and remove undamaged. Just ask for a oxy sensor socket of the appropriate dimension, around ten bucks.

 

I think it is 1 2 3 4 and it is the passenger side for left hand drive cars. Sensor 1 is pre cat, sensor 2 is post cat. Good idea to replace both, but they are easy enough to do one at a time. When install, try not to twist the wires too much.

 

+1, I simply use an open end wrench. I would also recommend replacing BOTH pre cat O2 sensors. Skip the post cat, they have no bearing on engine function and are only there to monitor correct operation of the catalyst.

I replaced one pre-cat, and the other failed about 9 months later...

 

It must be the season of O2 sensors.

I'm doing the ones in my car this weekend. From the looks of things, the wire on my RH side was flopping around and probably got nicked or crimped or something.

I have one of those goofy sockets for O2 sensors. They work fine, but you still have to deal with a twisty mess of wire and keep reseating the socket. For me, I'm to lazy to pull the fender liner (348) and use an open-end wrench, so the oxy-socket gets used.

 

I was in the office picking up my O2 sensor socket, and saw the order come through. Figured I might as well get 'er rolling !


(BTW, changing out my 2 sensors took a whopping total of 35 minutes)

 

Yes, you must use the OBDII tool. If you eliminate the fault, it will clear itself eventually, but might take dozens of driving cycles to do so. Use the tool, clear it immediately.