JCB P2267 – ECM: High Fuel Water Sensor Circuit Signal

The Engine Control Unit (ECU) has detected an abnormally high voltage signal from the water-in-fuel (WIF) sensor, indicating a 'Signal Stuck High' condition. This occurs when the voltage exceeds the manufacturer's specified upper limit, which can be caused by a short circuit to the battery, a faulty sensor, or significant water contamination in the fuel filter assembly. If left unaddressed, this fault can lead to reduced engine power and potential damage to the fuel injection system.

• 3C
• 3CX
• 3D
• 1400B
• 1550B
• 1600B
• 1700B
• 214
• 214E
• 215
• 216
• 217
• 4CX
• 528
• 531
• 531-70
• 535-125
• JS145W
• JS160W
• JS175W
• JS200W
• JS20MH
• Forklift 940
• Dieselmax engines
• EcoMAX engines
• Tier 4 engines

1. 1

   Verify the fault code with an OBD-II scanner and check for related codes like P2269 (State of water in the fuel).

2. 2

   Drain a sample of fuel from the water separator bowl into a clear container to visually check for water settling at the bottom (actual water contamination cause).

3. 3

   Inspect the fuel filter and service records to see if it is saturated or overdue for replacement.

4. 4

   Inspect the sensor's wiring harness for chafing, cuts, or heat damage, and check the connector for corrosion, bent pins, or loose connections.

5. 5

   Perform a voltage test at the sensor connector with the ignition on and engine off (normal is 0.1-0.5V; above 2.0V indicates a high circuit). The sensor is often supplied with a 5-volt reference from the ECM.

6. 6

   Measure resistance across the disconnected sensor terminals (typically around 10 kΩ ± 20%).

7. 7

   Check continuity on the wiring from the sensor connector back to the ECM (high resistance greater than 0.2 Ω or an open circuit indicates a wiring failure).

1. 1

   Address water contamination

   If water is found in the fuel sample, drain the water separator. For severe contamination, drain and clean the entire fuel tank and replace the fuel filters. After clearing the water, clear the fault codes and operate the machine to see if the fault returns.

2. 2

   Repair wiring and connectors

   If wiring damage or high resistance is found, repair or replace the affected harness section. Clean corroded connectors with electrical contact cleaner and ensure a secure connection.

3. 3

   Replace water-in-fuel sensor

   If electrical tests indicate a faulty sensor, turn off the ignition, disconnect the connector, and unscrew the sensor from the filter housing. Be prepared for some fuel to spill. Install the new sensor, ensuring a good seal, and reconnect the electrical connector.

4. 4

   Clear codes and verify

   Use a scanner to clear the fault codes. Start the engine and let it run to confirm the P2267 code does not return.