DTC P1504: Idle Air Control Circuit Malfunction: Condition

DTC is set when PCM detects that controlled current is out of preprogrammed range. Possible causes are:

• Idle Air Control (IAC) valve malfunction.
• Poor connection at IAC valve and PCM connectors.
• Open or short circuit between terminal No. 54 on Powertrain Control Module (PCM) and terminal "A" on IAC valve.
• Open or short circuit between terminal No. 83 on Powertrain Control Module (PCM) and terminal "B" on IAC valve.