AutoCodes – Subaru – P1518 Subaru

P1518 Subaru Code - Starter Switch Circuit Low Input

Quick Answer

The Engine Control Module (ECM) monitors the Starter Switch. Common causes include Faulty Starter Switch, Starter Switch harness is open or shorted, Starter Switch circuit poor electrical connection. 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, Starter Switch harness is open or shorted, Starter Switch circuit poor electrical connection.
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.

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Code Popularity 51,477

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 10, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1518 Subaru Description

The Engine Control Module (ECM) monitors the Starter Switch. The ECM sets the Diagnostic Trouble Code (DTC) when the Starter Switch is not to factory specifications.

OBDII Code P1518 Subaru - Starter Switch Circuit Low Input - AutoCodes.com — P1518 Subaru Code - Starter Switch Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P1518 Subaru?

Faulty Starter Switch
Starter Switch harness is open or shorted
Starter Switch circuit poor electrical connection

How to Fix the DTC P1518 Subaru?

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 does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1518 Subaru 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.

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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.