AutoCodes – Subaru – P1104 Subaru

P1104 Subaru Code - Engine Torque Control Signal Circuit Malfunction

Quick Answer

P1104 Subaru indicates Engine Torque Control Signal Circuit Malfunction. Common causes include Faulty Engine Torque Control, Engine Torque Control harness is open or shorted, Engine Torque Control 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: P1104 Subaru indicates Engine Torque Control Signal Circuit Malfunction.
Common causes: Common causes include Faulty Engine Torque Control, Engine Torque Control harness is open or shorted, Engine Torque Control 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 5,892

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P1104 Subaru Description

OBDII Code P1104 Subaru - Engine Torque Control Signal Circuit Malfunction - AutoCodes.com — P1104 Subaru Code - Engine Torque Control Signal Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1104 Subaru?

Faulty Engine Torque Control
Engine Torque Control harness is open or shorted
Engine Torque Control circuit poor electrical connection

How to Fix the DTC P1104 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 P1104 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 P1104 Subaru code?

Need more information on how to fix the P1104 Subaru code? Get Access to Factory Service Manuals

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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 P1104 Subaru Code

1. What are the common symptoms of OBDII code P1104 in a Subaru?

- Common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling issues.

2. What can cause the OBDII code P1104 in a Subaru?

- The code P1104 is typically caused by issues with the engine torque control signal circuit, such as wiring problems, faulty sensors, or a malfunctioning engine control module (ECM).

3. How does the engine torque control signal circuit malfunction affect the Subaru's performance?

- A malfunction in the engine torque control signal circuit can disrupt the communication between the engine sensors and the ECM, leading to incorrect engine torque control and impacting overall performance.

4. Can a DIY enthusiast repair the OBDII code P1104 in a Subaru?

- While some basic troubleshooting like checking for loose connections or damaged wiring can be done by DIY enthusiasts, diagnosing and repairing complex issues with the engine torque control signal circuit may require professional assistance.

5. What are the recommended steps to diagnose and repair the OBDII code P1104 in a Subaru?

- Steps may include performing a visual inspection of the wiring, testing the sensors and related components, checking for any software updates from the manufacturer, and resetting the ECM to see if the code reappears.

6. Is it safe to continue driving a Subaru with the OBDII code P1104 present?

- It is not recommended to drive a Subaru with the OBDII code P1104 present, as it can lead to further engine performance issues and potential damage over time. It is best to address the underlying problem promptly.

7. Can a faulty oxygen sensor trigger the OBDII code P1104 in a Subaru?

- Yes, a faulty oxygen sensor can sometimes trigger the OBDII code P1104 in a Subaru, as it can impact the engine torque control signal circuit and cause communication errors between sensors and the ECM.

8. How much does it typically cost to repair the OBDII code P1104 in a Subaru?

- The cost of repairing the OBDII code P1104 in a Subaru can vary depending on the underlying cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.

9. Can a Subaru dealership diagnose and repair the OBDII code P1104?

- Yes, Subaru dealerships have the expertise and diagnostic tools to accurately diagnose and repair the OBDII code P1104, ensuring that the issue is addressed correctly.

10. What preventive measures can Subaru owners take to avoid encountering the OBDII code P1104?

- Regular maintenance, such as timely servicing, checking for any warning lights or unusual symptoms, and addressing any issues promptly, can help prevent the occurrence of the OBDII code P1104 in a Subaru.