P0518 Code - Idle Air Control Circuit Intermittent
Quick Answer
P0518 indicates Idle Air Control Circuit Intermittent. Common causes include Faulty Idle Air Control Valve, Vacuum leak, Idle Air Control Valve harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0518 indicates Idle Air Control Circuit Intermittent.
- Common causes
- Common causes include Faulty Idle Air Control Valve, Vacuum leak, Idle Air Control Valve harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0518 Description
What are the Possible Causes of the DTC P0518?
- Faulty Idle Air Control Valve
- Vacuum leak
- Idle Air Control Valve harness is open or shorted
- Idle Air Control Valve circuit poor electrical connection
How to Fix the DTC P0518?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0518 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0518 code?
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Need Help with the Code?
Get the P0518 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P0518 Mazda — Idle Air Control Circuit Intermittent
Frequently Asked Questions about P0518 Code
1. What are the common symptoms of OBDII code P0518 (Idle Air Control Circuit Intermittent)?
- Common symptoms include irregular idle speed, stalling at idle, poor acceleration, and potential engine misfires.
2. What are the possible causes of OBDII code P0518?
- The code P0518 can be caused by issues such as a faulty idle air control valve, damaged wiring or connectors in the idle air control circuit, or a problem with the engine control module.
3. How can I diagnose the cause of OBDII code P0518?
- Diagnosing code P0518 involves checking the idle air control valve and its wiring for any visible damage, testing the electrical connections, and using a scan tool to monitor the idle air control system's operation.
4. Can a dirty throttle body cause OBDII code P0518?
- Yes, a dirty or clogged throttle body can disrupt the proper functioning of the idle air control system, leading to the intermittent circuit issue indicated by code P0518.
5. What are some repair tips for fixing OBDII code P0518?
- Repair tips include cleaning the throttle body, inspecting and repairing any damaged wiring or connectors in the idle air control circuit, and replacing the idle air control valve if necessary.
6. Is it safe to continue driving with OBDII code P0518 present?
- It is not recommended to drive with code P0518 present, as it can cause engine performance issues and potential stalling, leading to unsafe driving conditions.
7. Can resetting the OBDII system clear code P0518?
- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code P0518 is not addressed, the code is likely to reappear.
8. How much does it typically cost to repair OBDII code P0518?
- The cost of repairing code P0518 can vary depending on the specific cause of the issue, but it may range from around $100 for simple repairs to a few hundred dollars for more complex fixes involving parts replacement.
9. Does OBDII code P0518 affect fuel efficiency?
- Yes, code P0518 can affect fuel efficiency by causing irregular idling and poor engine performance, leading to increased fuel consumption.
10. Can a DIY enthusiast fix OBDII code P0518 at home?
- Depending on the cause of code P0518, DIY enthusiasts with some mechanical knowledge may be able to address the issue by cleaning the throttle body, checking and repairing wiring connections, or replacing the idle air control valve themselves.
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