Water in Fuel Sensor Circuit Intermittent
The P2268 code indicates that the powertrain control module (PCM) has detected an intermittent fault in the water-in-fuel sensor circuit. This sensor is typically located in the fuel filter/water separator assembly and monitors for water contamination in diesel fuel. An intermittent signal suggests a loose connection, corroded wiring, or a failing sensor, which can lead to inaccurate water detection and potential fuel system damage.
01. Most Common Causes
- Faulty water-in-fuel sensor
- Corroded or loose electrical connector at sensor
- Damaged wiring harness (chafed, broken, or shorted wires)
- Contaminated fuel filter/water separator causing sensor malfunction
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Water-in-fuel warning light on dashboard
- Engine may run rough or have reduced performance
- Possible hard starting or stalling
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the water-in-fuel sensor connector and wiring for damage, corrosion, or loose connections.
Step 3: Test sensor resistance and compare to manufacturer specifications; replace if out of range.
Step 4: Check fuel filter/water separator for water contamination; drain if necessary.
Step 5: Clear codes and test drive to verify repair.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code, as water in fuel can cause severe engine damage. Have the issue diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150, depending on whether the sensor needs replacement or just a wiring repair. Labor and parts may vary.