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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Engine Controls - Self-Diagnostics - 2.5) >> Diagnostic Tests >> DTC P0506: Idle Speed Control System Rpm Lower Than Expected >> Probable Cause

Probable Cause

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Malfunction is detected when idle speed is less than the target idle speed by more than 100 RPM. Possible causes are:

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