1999 dodge durango 5.2l code po505

There may be a fault code or codes stored, though. Have an engine scan done for trouble codes as a first step in diagnosis. If no codes are present, I would start by investigating the idle circuit-clean the throttle body and have the IAC (idle air control) tested for proper operation. Good luck.

CODE P0505= Idle Air Control Motor

replace heater core it is leaking and check coolant level asap

Did you use a OBD II scanner after you replaced the part to erase or clear the code from the ECM (Computer)?

could be the idle air control valve, vacuum leak or a bad throttle position sensor.

You need to replace you throttle position sensor or repair the wireing to it.Get the codes read and youy will get closer to the problem.

CODES PO505 IDLE AIR CONTROL MOTOR CIRCUIT. P2781 AND PO1757 DID NOT SEE THEM IN CODE MANUAL.CODE PO505 WHAT ITS TELLING YOU.THAT YOUR STEPPER MOTOR COIL CIRCUIT IS SHORTED TO SYSTEM POWER B+ OR STEPPER MOTOR COIL NUMBER 1 2 3 4 CIRCUIT OPEN OR SHORTED TO GROUND.

does yurs have the idle air control motor if so look into that

Remove and clean the idle air control valve.

Change fuel filter?