p0305 help, on a cadillac cts 2008

Question

p0305, p0089, p0300, p0301, p0087, p02a9, p0872, my car was working fine, well it got the service power steering message, but then this happened, and the car lost power, or completely shut off, and after a few minutes started working fine, cleared the codes, and nothing has happened till now?

Answer 1

P0305 Misfire number 5 cylinder

P0089 Fuel pressure regulator performance

P0300 Random misfire

P0087 Fuel rail pressure too low

P02A9 Fuel Injector 4 leak

P0872 Transmission fluid pressure (TFP) circuit high voltage

The reason the vehicle shuts off is there is a fuel pressure problem, low fuel pressure will result in a random misfire and a lean running condition. What should be a concern is when P02A9 is present , a open fuel injector will result in fuel being in the crankcase resulting in excessive smoke,and low fuel pressure  The fuel injector will have to be replaced.