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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 350 (Gas - DTCS P0456 To P0571) >> P0507-Idle Speed Performance Higher Than Expected >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
PCV SYSTEM LEAKS OR RESTRICTIONS
PCV VALVE STICKING OR STUCK OPEN
ENGINE VACUUM LEAKS
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  .