AutoCodes – Subaru – P1160 Subaru

P1160 Subaru Code - Return Spring Failure

Quick Answer

This electric motor is connected to the throttle shaft and is actuated by the engine ECM. Common causes include Check throttle body for binding, Faulty Throttle Actuator Motor, Throttle Actuator Motor harness is open or shorted. 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: P1160 Subaru indicates Return Spring Failure.
Common causes: Common causes include Check throttle body for binding, Faulty Throttle Actuator Motor, Throttle Actuator Motor harness is open or shorted.
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 13,694

How popular is this code, among other codes? Low

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 Jul 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1160 Subaru Description

This electric motor is connected to the throttle shaft and is actuated by the engine ECM. Therefore, the ECM controls engine speed and power. The engine ECM may close the throttle by a small amount to aid starting. It may also adjust throttle position for cruise control, traction control and engine speed limiting. The Diagnostic Trouble Code (DTC) will set when the ECM detects the throttle position is not within the desired range.

OBDII Code P1160 Subaru - Return Spring Failure - AutoCodes.com — P1160 Subaru Code - Return Spring Failure

What does this mean?

What are the Possible Causes of the DTC P1160 Subaru?

Check throttle body for binding
Faulty Throttle Actuator Motor
Throttle Actuator Motor harness is open or shorted
Throttle Actuator Motor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1160 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 P1160 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 P1160 Subaru 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 P1160 Subaru Code

1. What does the OBDII code P1160 mean for a Subaru?

P1160 indicates a "Return Spring Failure," which refers to an issue with the throttle return spring in the throttle body assembly.

2. What are the common symptoms of code P1160 on a Subaru?

Symptoms may include poor throttle response, difficulty accelerating, engine hesitation, and in some cases, the Check Engine Light turning on.

3. What causes the P1160 code to trigger on a Subaru?

The most common causes include a broken or worn throttle return spring, debris in the throttle body, or a malfunctioning throttle position sensor.

4. Can I drive my Subaru with the P1160 code active?

Driving with this code is not recommended as it can affect throttle control and potentially lead to unsafe driving conditions.

5. How do I fix the P1160 code on my Subaru?

Repairs may involve cleaning or replacing the throttle return spring, inspecting the throttle body for debris, and checking the throttle position sensor for proper operation.

6. How much does it cost to fix a P1160 code on a Subaru?

Repair costs vary but typically range from $100 to $300, depending on whether the throttle spring or related components need replacement.

7. Can a dirty throttle body cause the P1160 code?

Yes, a dirty or clogged throttle body can restrict the throttle return spring's movement and trigger the P1160 code.

8. Is the P1160 code common in all Subaru models?

This code is not very common but may appear in specific Subaru models with electronic throttle control systems.

9. Do I need a professional mechanic to fix the P1160 code?

While some DIYers may handle cleaning the throttle body or inspecting the spring, replacing the spring or diagnosing sensors may require a professional mechanic.

10. What tools are needed to diagnose and repair the P1160 code?

Basic tools like a socket set, throttle body cleaner, and an OBDII scanner are helpful, but more advanced diagnostics may require a multimeter or professional equipment.