P2265

Water in Fuel Sensor A Circuit Range/Performance

Fuel & air metering (diesel) Generic OBD-II Low

What it means

P2265 means the water-in-fuel sensor on a diesel fuel system is sending a reading that is outside its normal range or doesn't respond plausibly. That sensor warns you when water collects in the fuel/water separator. The fault is usually a dirty sensor, water intrusion, or wiring — not an engine-performance problem — but you do lose the water-in-fuel warning until it's fixed.

Low

Can I keep driving? Usually fine — the engine still runs normally; you mainly lose the water-in-fuel warning, so drain the fuel/water separator and get it repaired.

Real-world scan data

Seen in

545

scans in the past year

Found in

0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P2265 scans

P1A6Ein 48.3% of scans

P0645in 41.3% of scans

P1639in 38.5% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
A water-in-fuel warning lamp may stay on, or fail to work when needed
Often no change in how the engine actually runs

Common causes

Most likely first

Water or debris fouling the water-in-fuel sensorLikely
Failed or aged water-in-fuel sensorCommon
Corroded connector or water intrusion at the sensorCommon
Damaged or chafed wiring to the sensorLess often
Faulty PCM/ECM (rare)Less often

How to diagnose & fix

Work through it in order

Drain the fuel/water separator first — a full bowl can legitimately trip the sensor.
Read freeze-frame data, then inspect the sensor connector for corrosion or moisture.
Check the sensor wiring for opens, shorts, and poor grounds against spec.
Test the sensor's signal; replace the water-in-fuel sensor if it reads out of range.
Clear the code and re-test after a drive.

FAQ

Quick answers

Is it safe to drive with P2265?+

For the sensor fault itself, generally yes. But drain your fuel/water separator promptly — actual water in diesel fuel can damage the injection system.

Can I just clear P2265?+

You can, but it returns until the sensor, its wiring, or real water in the fuel is dealt with.

Read & clear P2265 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX