AutoCodes – Subaru – P0181 Subaru

P0181 Subaru Code - Fuel Temperature Sensor 'A' Circuit Range/Performance

Quick Answer

The fuel tank temperature sensor is used to detect the fuel temperature inside the fuel tank. Common causes include Faulty Fuel Temperature Sensor, Fuel Temperature Sensor harness is open or shorted, Fuel Temperature Sensor 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: P0181 Subaru indicates Fuel Temperature Sensor 'A' Circuit Range/Performance.
Common causes: Common causes include Faulty Fuel Temperature Sensor, Fuel Temperature Sensor harness is open or shorted, Fuel Temperature Sensor 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 8,851

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0181 Subaru Description

The fuel tank temperature sensor is used to detect the fuel temperature inside the fuel tank. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the fuel temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases..

OBDII Code P0181 Subaru - Fuel Temperature Sensor 'A' Circuit Range/Performance - AutoCodes.com — P0181 Subaru Code - Fuel Temperature Sensor 'A' Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0181 Subaru?

Faulty Fuel Temperature Sensor
Fuel Temperature Sensor harness is open or shorted
Fuel Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0181 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 P0181 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 P0181 Subaru code?

Need more information on how to fix the P0181 Subaru code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0181 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 P0181 Subaru Code

1. What are the common symptoms of OBDII code P0181 in a Subaru related to the fuel temperature sensor 'A' circuit?

The common symptoms include poor fuel economy, rough engine idle, difficulty starting the vehicle, and illuminated check engine light.

2. What are the possible causes of the P0181 code in a Subaru?

Possible causes include a faulty fuel temperature sensor, issues with the sensor circuit wiring or connectors, a defective engine control module (ECM), or a problem with the fuel temperature sensor's signal.

3. How can I diagnose the P0181 code in my Subaru?

Diagnosing the P0181 code may involve inspecting the fuel temperature sensor and its wiring for damage, checking the sensor's resistance using a multimeter, and verifying the sensor's readings with a scan tool.

4. Can I still drive my Subaru with the P0181 code present?

While it may be possible to drive the vehicle with the P0181 code, it is recommended to address the issue promptly to prevent potential fuel system problems and further damage to the engine.

5. How do I repair the Fuel Temperature Sensor 'A' Circuit Range/Performance issue in my Subaru?

Repairing the P0181 code typically involves replacing the faulty fuel temperature sensor, repairing any damaged wiring or connectors, and clearing the trouble codes with a scan tool.

6. Are there any tips for preventing the P0181 code from reoccurring in my Subaru?

To prevent the P0181 code from reoccurring, it is advisable to use quality fuel, maintain the vehicle's fuel system regularly, and address any engine performance issues promptly.

7. Can a DIY enthusiast fix the P0181 code in a Subaru, or should I seek professional help?

Depending on your automotive repair skills and access to tools, a DIY enthusiast may be able to address the P0181 code by following a repair manual or online guides. However, seeking professional help is recommended if you are unsure or inexperienced.

8. How long does it typically take to repair the P0181 code in a Subaru?

The repair time for the P0181 code can vary depending on the specific cause of the issue, but it may take anywhere from 1 to 3 hours to diagnose and fix the problem.

9. Will resetting the check engine light resolve the P0181 code in my Subaru?

Simply resetting the check engine light will not resolve the underlying issue causing the P0181 code. It is essential to diagnose the problem, make the necessary repairs, and clear the trouble codes properly to address the code.

10. Is the P0181 code a serious issue in a Subaru that requires immediate attention?

While the P0181 code may not cause immediate drivability issues, it is still important to address it promptly to prevent potential fuel system problems and ensure the vehicle operates efficiently.