AutoCodes – Subaru – P0414 Subaru

P0414 Subaru Code - Secondary Air Injection System Switching Valve 'A' Circuit Shorted

Quick Answer

An air pump is used on the vehicle to lower tail pipe emissions on start-up. Common causes include Faulty Air Pump inoperative, Air bypass solenoid harness is open or shorted, Air bypass solenoid circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0414 Subaru indicates Secondary Air Injection System Switching Valve 'A' Circuit Shorted.
Common causes: Common causes include Faulty Air Pump inoperative, Air bypass solenoid harness is open or shorted, Air bypass solenoid circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 3,701

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0414 Subaru Description

An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.

OBDII Code P0414 Subaru - Secondary Air Injection System Switching Valve 'A' Circuit Shorted - AutoCodes.com — P0414 Subaru Code - Secondary Air Injection System Switching Valve 'A' Circuit Shorted

What does this mean?

What are the Possible Causes of the DTC P0414 Subaru?

Faulty Air Pump inoperative
Air bypass solenoid harness is open or shorted
Air bypass solenoid circuit poor electrical connection

How to Fix the DTC P0414 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 P0414 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 P0414 Subaru Code

1. What are the common symptoms of OBDII code P0414 in a Subaru related to the Secondary Air Injection System Switching Valve 'A' Circuit Shorted?

- Common symptoms include the Check Engine Light (CEL) illuminating on the dashboard, rough idling, decreased fuel efficiency, and potential engine misfires.

2. What are the possible causes of the OBDII code P0414 in a Subaru?

- The code P0414 in a Subaru is often caused by a short circuit in the Secondary Air Injection System Switching Valve 'A', faulty wiring or connectors, or a defective switching valve itself.

3. How can I diagnose the OBDII code P0414 in my Subaru?

- Diagnosis typically involves using an OBDII scanner to retrieve the fault code, visually inspecting the wiring and connectors for any visible damage, and testing the switching valve for proper functionality.

4. Can I continue driving my Subaru with the OBDII code P0414 present?

- It is generally not recommended to continue driving with the code P0414 present, as it can lead to potential damage to the catalytic converter and affect the overall performance of the vehicle.

5. How can I repair the OBDII code P0414 in my Subaru?

- Repairing the code P0414 involves replacing the faulty Secondary Air Injection System Switching Valve 'A', repairing any damaged wiring or connectors, and clearing the code with an OBDII scanner.

6. Is it possible to reset the OBDII code P0414 in a Subaru without fixing the issue?

- While you can clear the code temporarily with an OBDII scanner, it is important to address the underlying issue causing the code P0414 to prevent further problems in the future.

7. Are there any preventive measures to avoid encountering the OBDII code P0414 in a Subaru?

- Regular maintenance of the Secondary Air Injection System, including checking for any signs of wear or damage, can help prevent issues that may trigger the code P0414 in a Subaru.

8. Can a DIY enthusiast repair the OBDII code P0414 in a Subaru?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to replace the Secondary Air Injection System Switching Valve 'A' or repair wiring issues causing the code P0414 in a Subaru.

9. How long does it typically take to repair the OBDII code P0414 in a Subaru?

- The repair time for the code P0414 can vary depending on the exact cause of the issue and the skill level of the person performing the repair, but it typically takes a few hours to complete.

10. Will the OBDII code P0414 in a Subaru cause any long-term damage if left unresolved?

- If left unresolved, the code P0414 can potentially cause damage to the catalytic converter and affect the overall performance and efficiency of the vehicle, so it is important to address the issue promptly.