AutoCodes – Subaru – P1100 Subaru

P1100 Subaru Code - Starter Switch Circuit Malfunction

Quick Answer

P1100 Subaru indicates Starter Switch Circuit Malfunction. 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: P1100 Subaru indicates Starter Switch Circuit Malfunction.
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 17,745

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1100 Subaru Description

OBDII Code P1100 Subaru - Starter Switch Circuit Malfunction - AutoCodes.com — P1100 Subaru Code - Starter Switch Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1100 Subaru?

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

How to Fix the DTC P1100 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1100 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.

Need more information about the P1100 Subaru code?

Need more information on how to fix the P1100 Subaru code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1100 Subaru Code

1. What are the common symptoms of OBDII code P1100 in a Subaru related to the Starter Switch Circuit Malfunction?

- Common symptoms include difficulty starting the vehicle, intermittent starting issues, or the engine not cranking at all.

2. What are the possible causes of the Starter Switch Circuit Malfunction code P1100 in a Subaru?

- Possible causes include a faulty starter switch, damaged wiring or connectors in the starter circuit, or a malfunctioning ignition switch.

3. How can I diagnose the Starter Switch Circuit Malfunction code P1100 in my Subaru?

- To diagnose this issue, you can use a diagnostic scanner to retrieve the trouble codes, check the starter switch for proper operation, inspect the wiring for any damage, and test the ignition switch.

4. Can a bad battery cause the OBDII code P1100 in a Subaru?

- Yes, a weak or faulty battery can potentially trigger the P1100 code by not providing enough power to the starter circuit.

5. Is it safe to continue driving my Subaru with the P1100 code related to the Starter Switch Circuit Malfunction?

- It is not recommended to drive your vehicle with this code present, as it may lead to unexpected stalling or starting issues, potentially leaving you stranded.

6. How can I reset the OBDII code P1100 in my Subaru after repairing the Starter Switch Circuit Malfunction?

- Once the issue has been fixed, you can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes to clear the error code.

7. Will a faulty starter motor cause the P1100 code in a Subaru?

- While a faulty starter motor itself may not directly trigger the P1100 code, it can contribute to starting issues that may lead to the code being set.

8. Can extreme weather conditions affect the occurrence of the Starter Switch Circuit Malfunction code P1100 in a Subaru?

- Yes, extreme temperatures or moisture can potentially exacerbate existing issues in the starter circuit, leading to the P1100 trouble code.

9. What are some tips for preventing the Starter Switch Circuit Malfunction code P1100 from occurring in my Subaru?

- Regularly inspecting and maintaining the starter circuit components, keeping the battery terminals clean and secure, and avoiding excessive strain on the starter system can help prevent this issue.

10. How much can I expect to pay for the repair of the Starter Switch Circuit Malfunction causing the P1100 code in my Subaru?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor at a mechanic or dealership.