Code : P1504
Make : BMW
Description : P1504 BMW Idle Speed Control Valve Closing Solenoid Control Open Circuit
Possible causes :
– Faulty Idle Speed Control Valve
– Idle Speed Control Valve harness is open or shorted
– Idle Speed Control Valve poor electrical connection
– Large vacuum leak on engine
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.
