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Home >> Mazda >> 2003 >> B4000 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1506: Idle Air Control System Malfunction >> Possible Causes

Possible Causes

Possible causes are:

Damaged IAC valve.
Damaged PCM.
Damaged throttle body.
IAC circuit short to GND.
IAC valve stuck open.
Vacuum leak.

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