DTC P0511: Idle Air Control Valve (IAC) Circuit Malfunction: Condition
WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when PCM detects an open, short or excessive current in Idle Air Control (IAC) valve circuit during engine operation. This is a continuous monitor. MIL is illuminated when PCM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- IAC valve circuit malfunction.
- PCM malfunction.
- Short or open circuit between IAC valve and PCM.