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P1518 Subaru Code - Starter Switch Circuit Low Input

Quick Answer

The P1518 Subaru code refers to an issue with the starter switch circuit having a low input. Common causes include Faulty starter switch, Wiring issues in the starter switch circuit, Corrosion or loose connections in the circuit. 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
P1518 Subaru indicates Starter Switch Circuit Low Input.
Common causes
Common causes include Faulty starter switch, Wiring issues in the starter switch circuit, Corrosion or loose connections in the circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P1518 Subaru Description

The P1518 Subaru code refers to an issue with the starter switch circuit having a low input. This means that the signal being sent from the starter switch to the vehicle's computer system is weaker than expected. The starter switch is a critical component that initiates the starting process of the vehicle by activating the starter motor. When this circuit has a low input, it can lead to difficulties starting the vehicle, and in severe cases, the vehicle may not start at all. This code can affect the vehicle's performance by causing starting issues, stalling, or even preventing the engine from starting altogether.

OBDII Code P1518 Subaru - Starter Switch Circuit Low Input
P1518 Subaru Code - Starter Switch Circuit Low Input

Common Causes of P1518 Subaru

  1. Faulty starter switch
  2. Wiring issues in the starter switch circuit
  3. Corrosion or loose connections in the circuit
  4. Faulty starter relay
  5. Issues with the vehicle's computer system

Symptoms of P1518 Subaru

  1. Difficulty starting the vehicle
  2. Engine stalling
  3. Intermittent starting problems
  4. Engine not starting at all
  5. Check Engine Light illuminated on the dashboard

How to Fix P1518 Subaru

  1. Diagnostic testing to confirm the specific cause of the issue
  2. Inspect and test the starter switch for proper functionality
  3. Check the wiring and connections in the starter switch circuit for any damage or corrosion
  4. Replace the faulty starter switch, starter relay, or repair any damaged wiring
  5. Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved

Cost to Fix P1518 Subaru

The cost of repairing a P1518 Subaru code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this issue can range from $150 to $500, including parts and labor. Keep in mind that additional diagnosis time may be required to pinpoint the exact cause of the problem, which can affect the overall repair cost. It's recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for P1518 Subaru

Check operation of the starter motor. If the starter motor operates when the ignition switch is turned to START position, repair open or ground short circuit in harness between Engine Control Module (ECM) and starter motor connector and poor contact in ECM connector. If the starter motor does not operate when the ignition switch is turned to START position, check the starter motor circuit.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1518 Subaru Code

1. What are the common symptoms of OBDII code P1518 in a Subaru related to the Starter Switch Circuit Low Input?

Common symptoms may include difficulty starting the vehicle, intermittent starting issues, and potentially a check engine light illuminated on the dashboard.

2. What are the possible causes of the OBDII code P1518 in a Subaru?

Potential causes of this code include a faulty starter switch, damaged wiring in the starter circuit, a defective starter relay, or issues with the ignition switch.

3. How can I diagnose the OBDII code P1518 in my Subaru?

Diagnosis typically involves checking the starter circuit for continuity, testing the starter switch and relay for proper function, and inspecting the wiring for any signs of damage or corrosion.

4. Can I still drive my Subaru with the OBDII code P1518 present?

It is not recommended to drive your vehicle with this code present, as it may lead to potential starting issues or further damage to the starter circuit components.

5. How can I repair the OBDII code P1518 in my Subaru?

Repairing this code often involves replacing a faulty starter switch, repairing damaged wiring, replacing a defective starter relay, or addressing any issues with the ignition switch.

6. Is it necessary to reset the OBDII code P1518 after making repairs to the starter switch circuit in my Subaru?

Yes, it is important to clear the code using an OBDII scanner after completing repairs to ensure the issue is resolved and the check engine light is reset.

7. Are there any preventative measures I can take to avoid encountering the OBDII code P1518 in my Subaru?

Regular maintenance checks, addressing any starting issues promptly, and ensuring the starter circuit components are in good condition can help prevent this code from appearing.

8. Can a DIY enthusiast with basic automotive knowledge repair the OBDII code P1518 in a Subaru?

Depending on the specific issue causing the code, some repairs related to the starter switch circuit can be done by DIY enthusiasts with the necessary tools and expertise.

9. How long does it typically take to repair the OBDII code P1518 in a Subaru?

The repair time can vary depending on the exact cause of the code and the extent of the repair needed. In general, it may take anywhere from 1-3 hours to complete the repair.

10. Should I seek professional help if I encounter the OBDII code P1518 in my Subaru?

If you are unsure about diagnosing or repairing the issue yourself, it is recommended to seek help from a qualified mechanic or automotive technician to properly address the problem and prevent further issues.

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