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What does this code mean p1518

(2002 Ford Focus SVT)
in Meriden, CT on November 21, 2010
what does p1518 this is what i got when i put it on the comp
Displaying 1 answers & 2 comments
Popular Answer
on 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.
on November 22, 2010
How do I fix it?is it going to hurt the engine?
on 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.
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