P2268 low

Water in Fuel Sensor Circuit High

The P2268 code means the vehicle's onboard diagnostic system has detected: Water in Fuel Sensor Circuit High. This is a low severity code.

My Garage →

Keep driving?: Yes, but fix soon
DIY difficulty: easy
Estimated cost: $50 - $250 (parts and labor)

Recommended Tool

ANCEL AD310 OBD-II Scanner

Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Every Tech Needs This

AstroAI Digital Multimeter

Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Common Symptoms

Check Engine Light on
Water in fuel warning light on
Engine runs rough or misfires
Hard starting in cold weather
Possible fuel system corrosion concern

Probable Causes (Ranked by Likelihood)

Open circuit in WIF sensor circuit Very High
Water contamination in the fuel tank or filter High
Corroded sensor connector from moisture exposure Moderate
ECM WIF sensor input circuit fault Low

Step-by-Step Diagnostic Procedure

Check fuel filter or fuel water separator for actual water contamination
Read WIF sensor data on scan tool
Inspect sensor wiring and connector for corrosion
Drain fuel water separator if equipped and retest

Frequently Asked Questions

What does the water in fuel sensor do?

The water in fuel (WIF) sensor detects water contamination in the fuel, primarily on diesel vehicles. Water in diesel fuel can damage fuel injectors and the injection pump.

How does water get in the fuel tank?

Water enters fuel tanks through condensation, contaminated fuel at gas stations, loose or damaged fuel caps, and cracked fuel filler necks. Diesel fuel is particularly susceptible to water absorption.

How do I drain water from my fuel system?

Most diesel vehicles have a fuel water separator with a drain valve at the bottom. Open the drain valve and allow water to drain until clean fuel flows out. Replace the fuel filter if contamination is severe.