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1998 Nissan 200sx with a code reading of P0440. because  of "service engine soon" light coming on. What does this mean and how is it repaired/fixed ?
Vehicle: 1998 Nissan 200SX

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HI there

This code means there is a small leak detected in the evap emissions system. This could be simply a loose gas cap. If not, then a smoke test is usually needed to locate the leak. Once the leak is located, you can then do the repair.
P0440 NISSAN - EVAP Control System Small Leak

Read more: https://www.autocodes.com/p0440_nissan.html

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