Guide To P0518 OBD Error Code Solutions

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Puzzled? OBD error code P0518? Too much to apprehend for once? Well, not anymore! This is surely going to help you solve the Error code. The idle control system monitors the engine idle speed. To increase or decrease the engine idle speed, the engine control module (PCM), opens or closes the idle air control valve to allow air into the engine. When the PCM fails to achieve the desired RPM and registers an inconsistency in the Engine idle RPM, it sets the code P0518

It should also be noted that the manufacturer of the vehicle sets an expected RPM that should be recorded when the engine is idling. Consequently, the PCM records the RPM during idle; if the readings registered are too high or too low as compared to the manufacturer’ specifications, the PCM tries to solve the problem by transmitting commands to various parts of the engine and transmission. If the RPM stays uncorrected, the PCM stores the code P0518.

What causes this problem with Idle Air Control Circuit Intermittent?

• Disconnected, corroded or open electrical components in the idle air control valve
• Damaged idle air control valve
• Vacuum leakage
• Idle air control valve harness shorted or open
• In rare case, fault in the PCM

1. Idle Air Control Valve - Facing the error code P0518? An inferior quality idle air control valve can always be hazardous for the system also it is one of the primal causes behind the occurrence of the error code P0518. Tune into Parts Avatar for supreme quality idle air control valve at pocket friendly prices.
2. Vacuum Leak - To overcome the complications caused by the OBD error code P0518 it is really important to fix the vacuum leak in time. So, what are thinking? Start repairing now.
3. Air Control Valve Harness - A distorted air control valve harness can end up being the chief host inviting the error code P0518. So, replacing one can be one of the wisest decisions to avoid a problematic system.
4. Powertrain Control Module - Having problems with the powertrain control module? Don’t you worry, Parts Avatar has it all. A faulty powertrain control module could end up being the root cause behind the error code P0518.

Curious about knowing the symptoms of the OBD code P0518? If yes, then you have arrived at the right place. We at Parts Avatar have listed out a few basic symptoms linked to the idle air control circuit intermittent.

Common mistakes

• Engine idle RPM high or low
• Halts at low speed
• Halts intermittently when the throttle is released
• Check engine light on

Have a look at some ways with which you can correct the P0518 code:

• A thorough cleansing of the throttle body bore
• A damaged Idle Air control valve should be replaced
• Mending the vacuum leak
• In a rare case, replacing the defective PCM

There is no need to be stressed about the recurring OBD code as we are here at your service. Have a look at our superior variety of idle air control valve, body control module, coolant temperature sensor, air control valve harness, powertrain control module, electronic control module, brake control module, engine temperature sensor and many more. Now all your problems will vanish within no time. Tune in now!

First, the code should be detected using a an OBD-II scanner, then the mechanic should proceed to a visual inspection of all the electrical parts: the following replacements, repairs and reconnections should be done as per the requirements. They should next clear the code and take a test drive of the vehicle to check the engine light (that shouldn’t reappear). If the code does return, the mechanic should disconnect the IAC motor from its electrical connect and then start the engine. If the code doesn’t return back after this step, the IAC valve has most likely had a short and is to blame.

If this diagnostic step fails to cover the problem, then the mechanic must continue checking the system for different electrical issues until the problem is found and treated.

Common mistakes while diagnosing the Error Code P0518

It has been observed that many mechanics report that it is common for the idle air control components to be restored before the throttle body bore is cleaned. This can lead to wastage of time and money. It is essential to perform the basic repairs such as replacing the electrical wirings or cleaning the throttle body bore before replacing the major components. It is also imperative to clear the code and perform a road test after each potential solution is tried and tested. If the most common repairs fail to prevent the code and stop the engine light appearing on, it should be taken a sign of an intermittent problem that requires an in depth investigation and thorough servicing.

P0519 - Idle Air Control System Performance