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P1504 Diagnostic Trouble Code Discussion for October 2014

Idle Air Control Solenoid Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1504
Help Request Posted
1999 Mazda Miata 10th Anniversary 1.8L Poor Idle Quality, Stall, MIL Lamp on VIN: JM1NB3539X
P1504: IAC Solenoid Circuit Malfunction. ... that would idle low and stall. There were codes for both O2 sensor heaters (p1136, p1142) as well as a code for the IAC (p1504). We decided to replace the O2 sensors first and then tackle the idle problem so the O2 sensors have been replaced. We removed th...
October 03, 2014
1999 Mazda Miata 10th Anniversary 1.8L Poor Idle Quality, Stall, MIL Lamp on VIN: JM1NB3539X
P1504: IAC Solenoid Circuit Malfunction. ... that would idle low and stall. There were codes for both O2 sensor heaters (p1136, p1142) as well as a code for the IAC (p1504). We decided to replace the O2 sensors first and then tackle the idle problem so the O2 sensors have been replaced. We removed th...
October 08, 2014