Error Code P0505: What It Means & What To Do?

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P0505 is an OBD-II generic code in which the engine control module (ECM) finds out the engine idle control system is not controlling the idle to stay in its specific location. The idle is at a level where it goes too high or goes too low.

The reason of the Idle Control System is to control the engine idle speed. Often, this is controlled by an Idle Air Control Motor that is mounted on or near the Throttle Body of the Intake Manifold. In certain case scenarios, an Idle Air Stepper Valve or Motor is very useful. To rise up or decrease the engine idle speed, the Powertrain Control Module (PCM) opens or closes either one of these devices in letting in more or less air by the Throttle Plate in the Throttle Body. This is accomplished as a way to encounter the erratic loads that are being placed on the engine, for instance the use of air conditioning, heat, and wipers.

What causes this problem with the Idle Air Control System Malfunction?

• The Check Engine Light will start illuminating and the code will set in ECM memory.
• The engine idle could be lower or higher than identifications.
• The engine may idle roughly if facing a vacuum leak.
• The engine might stall when running to a stop.
• The engine may idle too high at moments.

1. IAC Valve - Engine stalling is the utmost critical symptom of an idle control valve problem. If the IAC valve fails altogether, it might leave a source of air for the car as a way to maintain a correct idle. This could make the engine stall when performing and prevent idling in the engine, even cause the engine to stall as soon as it gets started. If you conclude that your idle control valve may be facing an issue, have a professional mechanic diagnose the car to determine if the idle control valve needs replacement.
2. ECM - A crucial symptom of a bad or failing ECM is a vehicle that has trouble starting or will not start at all. If the ECM completely fails, the vehicle will be left with no engine management control, and will stop stalling or running. The engine might still be cranking, but it will be incapable of starting not having important materials from the computer. As the ECM plays such an important part in the engine performance, any problems related to this can produce vital issues with the entire operation of the vehicle. If you conclude that your vehicle’s ECM is dealing with a major issue, have a professional mechanic inspect your vehicle right away.
3. Intake Manifold - An engine that overheats is a crucial symptom of a practical issue with the intake manifold gaskets. A coolant leak will ultimately paves way to an overheated engine as the coolant level plummets to a low level. If the intake manifold gaskets start leaking coolant into the intake manifold the engine would overheat, in turn, without any leaks visible from the outside. Any coolant leaks should be undertaken right away to stop any probability of critical engine damage happening because of a poor intake manifold gasket. If you conclude that your intake manifold gasket(s) might be facing an issue, have a professional technician inspect your vehicle to determine if the gasket should be replaced.

If you’re putting up with an OBD error code P0505, there are notable common symptoms that you can feel and see. Parts Avatar has written a list to help you better understand this issue.

Common Symptoms

• The Check Engine Light will start illuminating and the code will be in ECM memory.
• The engine idle could be lower or higher than identifications.
• The engine may idle roughly if facing a vacuum leak.
• The engine might stall when running to a stop.
• The engine may idle too high at intervals.

It is highly critical to adjust the fault code P0505. So there are a number of ways in which you can correct this problem:

• Replace the IAC valve and clean the throttle body, including channels
• Remove the carbon from throttle body and IAC channels, and clean IAC
• Repair a vacuum leak within the engine intake manifold vacuum system or gaskets

Regardless, if your facing any further issues, then we have stocked a wide variety of best priced IAC Valve, ECM, Intake Manifold and more to help you out in repairing your car.

If you want to do an easy job at diagnosing this fault code, by all means follow the important steps, which are described below:

• Scan codes and records for the code in the ECM by clearing and confirming the code
• Inspect the engine idle to view if it remains within identifications inside and outside of the gear and during the road test
• Detect the engine for vacuum leaks
• Check the engine for carbon accumulation on throttle plates and IAC valve inlet
• Disengage the IAC to view if the engine base idle is in range of identifications
• Remove the IAC and detect for any blocks of channels
  

Common Mistakes When Diagnosing the P0505 Code

• Never notifying if the engine has no vacuum leak prior to having the IAC replaced
• Never removing overabundant carbon in the IAC channels if having the IAC valve replaced