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I/M Monitors Cleared. YES! My problem in clearing the Cat I/M Monitor has been resolved. To get it to change from inc to OK I had to perform a drive cycle with very specific parameters regarding mph and how long at given mph. I followed these parameters and, after months of reading inc, the...

Bad news indeed. However I have come across another possible solution to explore. I am going to give it a shot and I'll post the results here when done.

Hello Bojangles. I have since replaced the downstream O2 Sensor. Replacement part was specific to the 2003 Tacoma, not an universal fit. The I/M monitor still will not reset and still reads inc. (Inject a bad word or two here). Talked to a repair shop and was told after all I have done...

Replaced the upstream O2 Sensor just a month prior to replacing the Cats. Did so because the Chk Eng Lite came on and the scanner showed a code for that sensor. After replacing the O2 Sensor the lite and code cleared. Downstream sensor is still Original Equipment.

PS. Sorry to not have responded sooner. Past forums I have been on (not Toyota) questions had to percolate a while before getting a response.

Re I/M Monitors & Cats. I believe I installed the correct Cat converters. I ordered converters that were specific to my 03 and were bolt ons. I also made sure they were CARB approved. To Bojangles, OR17TRD and Bogunn , Appreciate you guys taking an interest in my problem. Registration has...

Hello all. After replacing F & R cat converters on my 03 Tacoma when I hook up the scanner I get a "No Codes" reading but when I check the I/M Monitor status I am getting a INC on the cat converter monitor. I have put over 500 miles on the vehicle since changing the cats. Smog Station won't...