Water in Fuel Detected
Indicates that water has been detected in the fuel system.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine control system has detected an abnormal amount of water in the fuel, which can cause poor combustion and engine damage if not addressed.
What the computer is actually seeing
The ECM monitors inputs from the fuel system sensors. When the water content rises above 0.05% (500 ppm), the ECM triggers this code to alert the driver.
What a healthy reading looks like
Water content should be less than 0.05%. Fuel temperature typically around 60°F (15°C) when measured; check for signs of water separation.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect the fuel/water separator for water accumulation; drain if necessary. If water is present, continue to next step.
- 2Check the fuel filter for clogs or water effect; replace if the filter is compromised.
- 3Test the fuel sample for contamination; if water is present, replace the contaminated fuel and inspect system for leaks.
- 4Inspect wiring and connectors to the fuel sensor; repair any damage or corrosion found.
Common causes
- Faulty fuel/water separator
- Clogged fuel filter
- Water contamination from refueling
- Faulty fuel sensor
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle with this code?
It's not recommended; driving could worsen fuel system damage or engine performance.
Will the code return after fixing?
If you thoroughly remove the water contamination and address the cause, the code shouldn't return.
Why does it pair with other codes?
Related codes often indicate separate issues with fuel quality or system performance affecting the same components.
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