Yes to the PCM. It could still run, but I don't think that is where the problem is coming from. (Not saying it couldn't be that) Some of the things that could cause this code are a bad injector. This is usually the cause of this code but it doesn't rule out the possibility of one of the other causes such as an open in the wiring to the injector, short in the wiring to the injector or a bad PCM
So yes, the PCM could be the cause, but if the injector is working, like your mechanic said, I would thing there is a wiring problem. I would ask if they checked all of that before replacing the PCM.
Monday, June 14th, 2010 AT 2:36 PM