AutoCodes – Generic – P0181

P0181 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 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 45,100

How popular is this code, among other codes? Medium

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 May 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0181 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 that is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

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

What does this mean?

What are the Possible Causes of the DTC P0181?

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?

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 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 code?

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

Need Help with the Code?

Get the P0181 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0181 Chevrolet — Fuel Temperature Sensor Performance
P0181 Ford — Engine Fuel Temperature Sensor 'A' Circuit Range/ Performance
P0181 GMC — Fuel Temperature Sensor Performance
P0181 Honda — Fuel Temperature Sensor Circuit Range/Performance
P0181 Infiniti — Fuel Temperature Sensor Circuit Range/Performance
P0181 KIA — Fuel Temperature Sensor Circuit Range/Performance
P0181 Mazda — Fuel Temperature Sensor Circuit Range/Performance
P0181 Mercedes-Benz — Fuel Temperature Sensor 'A' Circuit Range/Performance
P0181 Mitsubishi — Fuel Temperature Sensor Circuit Range/Performance
P0181 Nissan — Fuel Temperature Sensor Circuit Range/Performance
P0181 Subaru — Fuel Temperature Sensor 'A' Circuit Range/Performance
P0181 Volkswagen — Fuel Temperature Sensor 'A' Circuit Range/Performance

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 Code

What does the OBDII code P0181 mean?

P0181 indicates an issue with the fuel temperature sensor 'A' circuit, specifically that the sensor is reporting values outside the expected range.

What are the symptoms of code P0181?

Symptoms may include poor fuel efficiency, engine hesitation, difficulty starting, and the check engine light illuminating.

What causes code P0181 to appear?

Common causes include a faulty fuel temperature sensor, damaged wiring or connectors, fuel contamination, or issues with the powertrain control module (PCM).

Can I drive my car with code P0181?

Driving with this code may be possible, but it can lead to reduced fuel efficiency, performance issues, and potential damage to the engine over time.

How is code P0181 diagnosed?

A mechanic will use an OBDII scanner to read the code, inspect the fuel temperature sensor and wiring, and may test the sensor's resistance or voltage output for abnormalities.

How do I fix code P0181?

Repairs may involve replacing the fuel temperature sensor, repairing damaged wiring or connectors, cleaning contaminated fuel, or reprogramming the PCM if necessary.

How much does it cost to fix code P0181?

The repair costs can vary, but replacing the fuel temperature sensor typically ranges from $100 to $300, depending on the vehicle and labor rates.

Can a bad fuel temperature sensor cause engine damage?

While a bad fuel temperature sensor itself may not directly cause engine damage, prolonged issues with fuel mixture and performance can lead to wear and other problems.

What is the function of the fuel temperature sensor?

The fuel temperature sensor monitors the temperature of the fuel to help the PCM adjust fuel delivery for optimal engine performance.

Will code P0181 clear itself after repairs?

In some cases, the code may clear after repairs, but it’s recommended to use an OBDII scanner to manually clear the code and confirm the issue is resolved.