I recently changed the tranny and as soon as I start the car it turns on but wont pass 2k rpm like it wants to but it cant. THE CHECK ENGINE CODE IS P1235 FUEL PUMP FAILURE CIRCUIT I ALREADY CHANGED FUEL DIRECT HIGH PRESSURE THAT GOES ON TOP OF THE HEAD AND THE FUEL PRESSURE SENSOR PLEASE HELP !!!!:[

 

If the fuel pressure sensor was the culprit, the car wouldn't start at all, which I'm assuming you had that problem in the past and was the reason you replaced it.

You say you replaced the tranny. Did you double check hoses, lines, and electrical connectors were reconnected properly? Proper fluid level? Obviously if that code wasn't there before, I'd start looking to make sure no connections were frayed/cut on accident.

 

the car runs gears shift but the problem is the car is on limp mode, meaning it wont rev pass 2k .I checked the fuel pump seems likes it working but the filter is a bit dirty. I TOOK IT THE DEALER INSTEAD DAMM LEXUS.

 

i have the same symptoms and code on my 06 is350. I was reading that the driver fuel injection driver connections could have came loose and cause this code. So I checked the connections there and all the connections seem like they are still good. What else could be the solution to this?