First, I'm assuming that they replaced the exhaust Camshaft Position (CMP) actuator solenoid valve (next to cyl #1 plug on top of the engine) & not the CMP actuator itself. I guess some guys call those sensors but I don't because they don't sense anything.
I would need to know what the current code/s are that have popped the MIL since completing the repair to help you. I have a suspicion but I'll wait for the codes. I assume they did clear the codes after the repair.
Autozone can read them for you if you don't own a code reader.
Also, clean the throttle body if it hasn't been lately. It's just basic maintenance.
Last edited by greenman; 04-25-2012 at 07:30 PM.