error fault code 12

Has anyone figured out what is the reason for code 12 fault? Original 1uz-fe ecu. The code says rpm signal fault. Replaced crank sensor and cleaned cam sensor no change. How i came about this issue is as follows. I tried starting the car and the starter wouldn't turn over. I removed the...

Hi had this code a few week back. Checked wiring and crank position senor.. Cleared the code and voila the motor fired up.. Still not sure the problem was fixed permanently.. So could anyone tell me what is circuit One? As code says rpm signal circuit one any advice would be much appreciated...

Hi all, been using my Truck with 1993 Lexus LS400 power for around 10months. Always started up first crack once or twice it has cut out, no tick over and then was reluctant to start, but always did after turning over for a few seconds Mostly while I've been using it it has started no problem...

i have had a number of codes from my 1uzfe/hilux. code 12 relates to rpm signal, i was advised to recheck the cam timing. cam timing is fine. we checked ignition timing and found it was only running about 4 degrees. when the engine is revved the timing actually retarded further to mayby 2 or 3...

Any hints Gentlemen? I have ecu code 12 whic is supposed to be cam or crank sensor faults Crank sensor tested at 1250ohms both cam sensors at 1300ohms, all sensors tested all the way back to the ECU. The manual states that if the sensors test ok (the range is 950 to 1250ohms) that the ecu...