Help, my S40 cel comes on with the code p0014. Sometimes it has the p0015 code as well...up tp 4 times. I have checked the actuator w/ 12v current and it clicks. I've replaced the actuator gasket. There is no sludge apparent in these areas. The car has 93k miles. The question; how could the exh. timming be too advanced at times, and too retarded at other times? does this point to the sensor??
Thanks