AFTER I THOUGHT I HAD FIXED ALL THE PROBLEMS WITH MY MAX AND THE CEL IS OFF. YET AGAIN MORE PROBLEMS ARISE. PULLED CODES AND 0703 WHICH DIAGNOSE AS THREE WAY Catalyst (left bank). WHAT IS THIS??

ALSO 0905, CRANKSHAFT POSTION SENSOR (position). THIS DOES NOT SOUND GOOD. THESE DAMN SENSORS ARE DRIVING ME CRAZY. RECENTLY REPLACED: KS, LEFT O2 SENSOR, AND REINSTALLED AIR INTAKE SENSOR.

ANY HELP, I'M GREATFUL.

 

0703
Diagnostic Trouble Code 0703 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 left 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. Possible causes include ...
- Three-way catalyst
- Exhaust tube
- Intake air leaks
- Fuel injectors
- Spark plugs
- Ignition timing



0905 - Replace the sensor.



BTW never type in all caps every again.