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P1504 Diagnostic Trouble Code Discussion for September 2010

Idle Air Control Solenoid Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1504
Help Request Posted
1998 Mercury Mystique LS 2.5L Surge VIN: 1MELM66L2W
P1504: Iac circuit fault. Customer came back 2 days later with complaints that the car has a high idle. We checked the car with the customer here, unplugged the IAC and the problem went right away. replaced Iac (ford part) and problem persisted. Symptoms only occur in drive, not in par...
September 27, 2010