AutoCodes – Generic – P2266

P2266 Code - Water in Fuel Sensor Circuit Low

Quick Answer

The Fuel Sensor detects fuel (ethanol) contamination and provides the Engine Control Module (ECM) with a fuel temperature. Common causes include Fuel contamination, Fuel filter, Faulty Fuel Sensor. 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: P2266 indicates Water in Fuel Sensor Circuit Low.
Common causes: Common causes include Fuel contamination, Fuel filter, Faulty Fuel Sensor.
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 8,846

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 P2266 Description

The Fuel Sensor detects fuel (ethanol) contamination and provides the Engine Control Module (ECM) with a fuel temperature. The ECM monitors the water in fuel circuit and has detected the return voltage to be above or below threshold limits for the sensor.

OBDII Code P2266 - Water in Fuel Sensor Circuit Low - AutoCodes.com — P2266 Code - Water in Fuel Sensor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2266?

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

How to Fix the DTC P2266?

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 P2266 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 P2266 code?

Need more information on how to fix the P2266 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2266 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2266 Dodge — Water in Fuel Sensor Circuit Low
P2266 Ford — Water in Fuel Sensor Circuit Low
P2266 Jeep — Water in Fuel Sensor Circuit Low

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 P2266 Code

1. What are the common symptoms of OBDII code P2266?

- Common symptoms include poor engine performance, rough idling, reduced fuel efficiency, and in some cases, the vehicle may go into a limp mode.

2. What does the OBDII code P2266, Water in Fuel Sensor Circuit Low, indicate?

- This code indicates that the water in fuel sensor circuit is detecting a low voltage signal, potentially due to water contamination in the fuel system.

3. What are the possible causes of OBDII code P2266?

- Possible causes include a malfunctioning water in fuel sensor, water contamination in the fuel system, damaged wiring or connectors related to the sensor, or a faulty engine control module.

4. How can I diagnose the source of OBDII code P2266?

- Diagnosing this code typically involves inspecting the water in fuel sensor, checking for water contamination in the fuel, testing the sensor circuit for proper voltage, and inspecting for any damaged wiring or connectors.

5. Can I continue driving my vehicle with OBDII code P2266?

- It is not recommended to drive the vehicle with this code present, as it can lead to further fuel system issues and potential engine damage. It's best to address the issue promptly.

6. Is it safe to ignore OBDII code P2266?

- Ignoring this code can result in poor engine performance, reduced fuel efficiency, and potential long-term damage to the engine. It is advisable to address the issue as soon as possible.

7. Can I repair OBDII code P2266 myself?

- Repairing this code may require advanced diagnostic tools and knowledge of the fuel system. It is recommended to seek assistance from a qualified mechanic to properly diagnose and repair the issue.

8. How much does it cost to fix OBDII code P2266?

- The cost of repair can vary depending on the root cause of the issue. It may involve replacing the water in fuel sensor, addressing fuel system contamination, or repairing wiring/connectors. Costs can range from a few hundred to a few thousand dollars.

9. Are there any preventive measures to avoid OBDII code P2266 in the future?

- Regularly maintaining the fuel system, using quality fuel from reputable sources, and promptly addressing any fuel system issues can help prevent the occurrence of OBDII code P2266.

10. Can a faulty water in fuel sensor cause other issues in the vehicle?

- Yes, a faulty water in fuel sensor can lead to inaccurate fuel/water ratio readings, potentially causing engine misfires, poor fuel efficiency, and other related issues.