what does this code mean p1518 on 2002 Ford Focus SVT

what does p1518 this is what i got when i put it on the comp

by in Meriden, CT on November 21, 2010
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1 answer 2 comments
ANSWER by , November 21, 2010
It means...intake manifold runner control malfunction. From the shop manual: The IMRC system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is less than an expected calibrated range at closed throttle.
COMMENT by , November 22, 2010
How do I fix it?is it going to hurt the engine?
COMMENT by , November 22, 2010
It's not a simple diagnosis and repair; I do recommend a technician look at it - one versed in the operation of this system (IMRC). Check engine lights indicate emissions and performance issues - I would say that it is something that requires inspection and repair.