This P0506 code is one that's sometimes triggered on vehicles that have electronic throttle control. That is, they don't have a regular throttle cable from the accelerator pedal to the engine. They rely on sensors and electronics to control the throttle. In this case, the P0506 DTC (diagnostic trouble code) is triggered when the PCM (powertrain control module) detects an engine idle speed that is lower than the desired (pre-programmed) RPM.
Causes:
A P0506 DTC trouble code may be caused by one or more of the following:
· A vacuum leak
· An air restriction in the intake
·
· air path or exhaust
· A faulty positive crankcase ventilation (PCV) valve
· Damaged/failed/dirty throttle body
· Internal engine problem
· Failed PCM
This DTC is more of an informational code, so if there are any other codes set, diagnose them first. If there are no other codes, inspect for vacuum leaks, restrictions, and damage. If there are no symptoms other than the DTC itself, just clear the code and see whether it returns
Idle speed too low
SOURCE: IDLE CONTROL SYSTEM CODE PO506
You need the idle control solenoid replaced. It is the dealer that will fix it for you.
Good luck.
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