Trouble code P1504 means: Idle air control (IAC) circuit malfunction
According to my Chilton repair manual : P1504 - idle air control (IAC) valve and / or circuit fault
Trouble code P1504 means: Idle air control (IAC) circuit malfunction Trouble code P1507 means: Idle air control (IAC) underspeed error
Trouble code P1504 means: Idle air control (IAC) circuit malfunction
P1504= Idle air control circuit malfunction
OBD 2 Code 1504 is P1504 Intake Air Control circuit malfunction P1504 Intake Air Control circuit malfunctionpossible causesIAC circuit openVPWR to IAC solenoid openIAC circuit short to PWRIAC circuit short to GNDDamaged IAC valveDamaged PCM
Trouble code P1504 means: Idle air control (IAC) circuit malfunction
Trouble code P1507 means: Idle air control (IAC) underspeed error
insufficient egr flow
It was an available option.
55 code is not an error code, it signals end of codes. If no other codes preceded it, you have no error codes.
insufficient egr flow
Trouble code P1504 means:Idle air control IAC circuit malfunction