I am trying to find out why my 1992 sc 300 is in fail safe mode. No overdrive. No check engine light/ trans light. I had a o/d off light flashing while drive for a while. Replaced shift solenoids. Light went off still not overdrive. Transmission does not slip and feels strong. Last time it was not in fail safe mood was in the highway before the solenoids was replaced. Had no overdrive but have it near 70 mph and than for no reason and car did not skip a beat or slow down rpm's jumped from 4,000 rpm to 5,700 and damn I really hit the brake. I am think bad sensor. Can a o2 sensor make it go into fail safe mode? I have had 3 people say it needs a dealer level scanner, like at Lexus or transmission shop, but they all said that in the phone. But would they even be able to see it was o2 sensors? I hate to say someone and get no where. Damn obd 1.

 

does anyone know where I can get a good used transmission for my 1992 lexus sc 300 transmission fluid was really black lost overdrive and can only get up to about 50 mph at 4 rpms. no over drive off light and no check engine light. please help!!! Does not slip when I go from drive to 2nd rpms kick up. so only feels like a low 3 rd gear. Anyone else have issues that this. The guy the works on my car alot said they used this transmission on alot of other cars. but I think it needs to come out of another sc 300.

 

Having the same issue code keeps coming up p1121 I was thinking either to replace the throttle linkage and senser but I'm worried if that's not the problem should I just get a whole new throttle body but I went to every single Pick-A-Part from Ontario all the way down to Rialto San Bernardino Riverside and even the the GS they had there for one day and the throttle body was gone off of it just aggravated so expensive to get a new one 500 and 300 for a used one any ideas artist someone know where I can buy one or am I wasting my time doing that and money

 

Replacing the entire throttle body might fix the issue, but it is also a gamble. You're putting old parts from another car into your old car. I bought a brand new APPS sensor to fix my P1121 code.

If you're handy and are willing to potentially break your existing APPS, then you can try splitting it and resoldering all the old connections.

 

hi can i get those pdf