P2266 Fault Code

Water in Fuel Sensor Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2266 fault code indicates a problem with the water in fuel sensor circuit, where the signal to the Engine Control Module (ECM) is abnormally low. This could result from water accumulation in the fuel system, defective wiring, or even a faulty sensor. If this issue is not addressed, it can lead to poor engine performance and potential engine damage.

What are the symptoms of the P2266 code?

Symptoms associated with the P2266 code may include:

• Check engine light illuminated on the dashboard.
• Engine misfires or runs rough, particularly when starting.
• Reduced acceleration or power sluggishness during operation.
• Possible fuel contamination leading to engine performance issues.

What causes the P2266 code?

Common causes for the P2266 fault code include:

• Accumulation of water in the fuel tank due to condensation or fuel quality issues.
• Damaged or corroded wiring and connectors affecting the water in fuel sensor circuit.
• A faulty water in fuel sensor that isn't providing accurate readings to the ECM.
• Issues with the power supply to the sensor causing low voltage.

How to fix P2266?

To resolve the P2266 fault code, consider the following steps:

• Inspect the water in fuel sensor and its connections for any visible damage or corrosion.
• Drain any water present in the fuel tank and replace it with fresh fuel.
• Repair or replace any damaged wiring or connectors in the sensor circuit.
• If necessary, replace the faulty water in fuel sensor to ensure accurate readings.