How severe is this DTC?
The severity of this code can vary greatly from a simple check engine light on or water in fuel light on in a vehicle that starts and runs to an automobile that stalls, misfires, or does not start at all. Damage to the fuel system and internal engine components can occur if this situation is not corrected in a timely manner.
What are some of the symptoms of the code?
Symptoms of a P2267 fault code may include:
- Engine may stall
- Severe misfires
- Engine does not start
- Poor fuel economy
- Poor performance
- Check engine light on
- Water in fuel light on
What are some common causes of the code?
Causes
of this P2267 code may include:
- Faulty water in fuel sensor
- Contaminated fuel
- Blown fuse or fuse link (if applicable)
- Faulty or worn fuel filter
- Corroded or damaged connector
- Faulty or damaged wiring
- Faulty ECU
What are the troubleshooting steps for P2267?
The first step in the troubleshooting process for any malfunction is to search for Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and powertrain. In some circumstances, this can save you a lot of time in the long run by pointing you in the right direction.
The second step is to check the vehicle records to see when the fuel filter was replaced and visually inspect the condition of the filter.
Most common causes
of this code are a faulty fuel filter or contaminated fuel. A visual inspection of the fuel can be performed using a glass jar. Once a sample is taken and allowed to settle, water and fuel will separate within a few minutes. The presence of water in the fuel is an indication of contaminated fuel, a faulty fuel filter, or both. Next, you should locate all components in the water in fuel circuit and perform a thorough visual inspection to check the associated wiring for obvious defects such as scraping, rubbing, bare wires, or burns. Then, check the connectors for security, corrosion, and damaged pins. The sensor is normally mounted on top of the fuel tank on most vehicles.
Advanced Steps
Advanced steps become very vehicle-specific and require appropriate advanced equipment to operate accurately. These procedures require a digital multimeter and the specific vehicle technical references. The ideal tool to use in this situation is an oscilloscope, if available. The O-scope will provide an accurate illustration of the signal pulses and frequency levels that will be proportional to the level of fuel contamination. The typical frequency range is 50 to 150 hertz; with 50 hertz representing clean fuel and 150 hertz representing a high level of contamination. Voltage requirements and signal pulses vary depending on the specific year and model of the vehicle.
Voltage Checks
The water in fuel sensor is typically supplied with a voltage reference of about 5 volts from the PCM. If this process identifies the absence of a power source or ground, continuity tests may be required to check the integrity of the wiring, connectors, and other components. Continuity tests should always be performed with the power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms of resistance. Resistance or lack of continuity is an indication of faulty wiring that is open or shorted and should be repaired or replaced.
What are the common repairs for this code?
- Replacement of the water in fuel sensor
- Replacement of the blown fuse or fuse link (if applicable)
- Cleaning corrosion from connectors
- Repairing or replacing faulty wiring
- Removal of contaminated fuel
- Replacement of the fuel filter
- Replacement of the ECU
Common mistakes may include:
Replacing the PCM or the water in fuel sensor when damaged wiring or contaminated fuel is the cause of the problem.
I hope the information contained in this article has been helpful in pointing you in the right direction to correct the issue with your water in fuel circuit fault code. This article is strictly informational, and the technical data and service bulletins specific to your vehicle should always take priority.