AutoCodes – Subaru – P1154 Subaru

P1154 Subaru Code - HO2S11 Sensor Circuit Range/Performance Low

Quick Answer

P1154 Subaru indicates HO2S11 Sensor Circuit Range/Performance Low. Common causes include Faulty HO2S11, HO2S11 harness is open or shorted, HO2S11 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: P1154 Subaru indicates HO2S11 Sensor Circuit Range/Performance Low.
Common causes: Common causes include Faulty HO2S11, HO2S11 harness is open or shorted, HO2S11 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 5,349

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 May 03, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1154 Subaru Description

OBDII Code P1154 Subaru - HO2S11 Sensor Circuit Range/Performance Low - AutoCodes.com — P1154 Subaru Code - HO2S11 Sensor Circuit Range/Performance Low

What does this mean?

What are the Possible Causes of the DTC P1154 Subaru?

Faulty HO2S11
HO2S11 harness is open or shorted
HO2S11 circuit poor electrical connection

How to Fix the DTC P1154 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 P1154 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 P1154 Subaru code?

Need more information on how to fix the P1154 Subaru code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1154 Subaru code diagnosed by a professional: Find a repair shop in your area

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 P1154 Subaru Code

1. What are the common symptoms of OBDII code P1154 in a Subaru vehicle?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and an illuminated check engine light.

2. What does the OBDII code P1154 in a Subaru indicate?

- The code P1154 indicates a problem with the HO2S11 (Heated Oxygen Sensor 1) sensor circuit range/performance being too low.

3. What are the possible causes of OBDII code P1154 in a Subaru?

- Possible causes include a faulty HO2S11 sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, or issues with the fuel system.

4. How can I diagnose the OBDII code P1154 in my Subaru?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the HO2S11 sensor and its connections, and checking for any exhaust leaks or fuel system issues.

5. Can I drive my Subaru with the OBDII code P1154?

- It is generally not recommended to drive your vehicle with the code P1154 present, as it can lead to poor engine performance and potential damage if left unresolved.

6. How can I repair OBDII code P1154 in my Subaru?

- Repair options may include replacing the HO2S11 sensor, repairing any damaged wiring or connectors, fixing exhaust leaks, or addressing any fuel system problems.

7. Is it possible to clear the OBDII code P1154 in a Subaru without fixing the issue?

- While you can clear the code with an OBDII scanner, it is important to address the underlying problem causing the code to prevent further issues.

8. How much does it cost to fix OBDII code P1154 in a Subaru?

- The cost of fixing the P1154 code can vary depending on the specific cause of the issue, but it may involve sensor replacement, wiring repairs, or other diagnostics.

9. Can a DIY enthusiast fix OBDII code P1154 in a Subaru?

- Depending on your experience and tools, you may be able to address simpler causes like sensor replacement or checking connections, but more complex issues may require professional help.

10. How often does OBDII code P1154 occur in Subaru vehicles?

- The occurrence of the P1154 code in Subaru vehicles can vary, but it is not an uncommon issue and should be addressed promptly to avoid further complications.