P0505 obd2 code and how to check your idle speed control valve circuits
Checking P0505 code requires checking the idle control valve circuits and its wirings. Browse also our check engine codes list below so you will know the description of the obd2 codes
P0505 Engine Idle Air Control Fault
This
code can be tested by using some basic test like testing
for vacuum leaks to see if it is the source of erratic idle
speed control valve malfunction. Take note that your iac
control motor is the device that stabilizes your engine
idle speed and if you have a vacuum leak, the iac motor
will try to compensate for the leak. If you recall, vacuum
leak will cause your engine rpm to rev up and it is the
job of the iac motor to bring it down after being monitored
by the ecm. However, if there is no leak, it is obviuos
it is not a vacuum related problem but the iac motor itself.
To test, disconnect the iac wiring connections and see if
there is a change on the idle rpm. If not, replace the iac
motor but do forget to follow the code resetting so the
iac motor speed can go to the "relearn mode".
Servicing the idle speed control valve:
When servicing the idle speed control valve, remove any carbon soot and make sure the cone seal area is clean and in good condition by using a bit of fine steel wool on the cone. The carburetor cleaner can be sprayed into the port and a large Phillips head screwdriver wrapped in a rag to clean and remove a good amount of carbon soot from the port. To measure the pintle on the new IAC valve, make sure it is longer than 1 in. The common strategy is to open the idle air-bypass valve electrically to let some more air in for better cleaning.
Before reinstalling the idle control valve, measure the distance that the IAC valve is extended from the motor housing to the end of the IAC cone. It should not exceed 1-1/8" (or contact ATS for proper specs for different engines) or damage to the IAC valve may occur when installed again.
This servicing assumes that the IAC motor has been checked for proper electrical resistance. (Shown in the picture on the left above is an IAC valve for FORD engine).
CODE Meaning or Description
P046D
EGR Sensor A
P046E EGR Sensor B
P046F EGR Sensor B
P0470 Engine Exh press Sensor Ckt
P0471 Engine Exh press Sensor Ckt
P0472 Engine Exh press Sensor Ckt
P0473 Engine Exh press Sensor Ckt
P0474 Engine Exh press Sensor ckt
P0475 Engine Exh press Cntl Valve
P0476 Engine Exh press Cntl Valve
P0477 Engine Exh press Cntl Valve
P0478 Engine Exh press Cntl Valve
P0479 Engine Exh press Cntl Valve
P047A Engine Exh Press Sensor Ckt
P047B Engine Exh Press Sensor Ckt
P047C Engine Exh Press Sensor Ckt
P047D Engine Exh Press Sensor Ckt
P047E Engine Exh Press Sensor Ckt
P047F Engine Exh Press Control Valve
P0480 Engine Fan 1 Cntl ckt
P0481 Engine Fan 2 Cntl ckt
P0482 Engine Fan 3 Cntl ckt
P0483 Engine Fan Performance
P0484 Engine Fan Current
P0485 Engine Fan Power-Ground
P0486 EGR Sensor B Ckt
P0487 EGR Sensor A Ckt
P0488 EGR Sensor TPS A Ckt
P0489 EGR cntl Ckt
P048A EGR cntl valve kt
P048B EGR cntl valve ckt
P048C EGR cntl valve ckt
P048D EGR cntl valve ckt
P048E EGR cntl valve ckt
P048F EGR cntl valve ckt
P0490 EGR cntl ckt
P0491 Engine Air Injection System Flow (Bank
1)
P0492 Engine Air Injection System Flow (Bank
2)
P0493 Engine Fan Overspeed
P0494 Engine Fan Speed
P0495 Engine Fan Speed
P0496 Engine Evap Emission Purge Flow
P0497 Engine Evap Emission Purge Flow
P0498 Engine Evap Emission Control Ckt
P0499 Engine Evap Emission Control Ckt
P049A EGR B Flow
P049B EGR B Flow
P049C EGR B Flow
P049D EGR B Flow
P049E EGR cntl position
P0500 Engine Vehicle speed
P0500 Engine Vehicle Speed
P0501 Engine Vehicle Speed Sensor
P0502 Engine Vehicle Speed Sensor
P0503 Engine Vehicle Speed Sensor
P0504 Vehicle Brake Switch variation
P0505 Engine Idle Air Cntl
P0506 Engine Idle Air cntl
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