I Have a 2006 Toyota rav4 4cyl, I have a code P0778 saying its a pressure control solenoid b. The car is in the shop right now and I got a used ECM put in it but the lights came on again and now I'm clueless. The guy is saying that the value body looks fine. I noticed that the transmission fluid is dark but not black but it smells burnt, not sure if that could be the problem. Not sure if it can be a wiring harness.