P1139 Ford Code - Water In Fuel Indicator Circuit Malfunction
Quick Answer
The P1139 Ford OBD-II diagnostic trouble code indicates a malfunction in the Water in Fuel Indicator Circuit. Common causes include Contaminated fuel with water, Faulty water in fuel sensor, Wiring or electrical issues in the indicator circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1139 Ford indicates Water In Fuel Indicator Circuit Malfunction.
- Common causes
- Common causes include Contaminated fuel with water, Faulty water in fuel sensor, Wiring or electrical issues in the indicator circuit.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1139 Ford Description
The P1139 Ford OBD-II diagnostic trouble code indicates a malfunction in the Water in Fuel Indicator Circuit. This code is specifically related to the detection of water in the fuel system, which can be detrimental to the engine's performance and overall health. Water in the fuel can cause a variety of issues, such as decreased fuel efficiency, rough idling, hesitation, and potentially even engine misfires.
Common Causes of P1139 Ford
- Contaminated fuel with water
- Faulty water in fuel sensor
- Wiring or electrical issues in the indicator circuit
- Corrosion or damage to the fuel filter
- Issues with the engine control module (ECM)
Symptoms of P1139 Ford
- Illumination of the Water in Fuel warning light on the dashboard
- Decreased fuel efficiency
- Rough idling or engine hesitation
- Engine misfires
- Difficulty starting the engine
How to Fix P1139 Ford
- Begin by draining the fuel tank to remove any water-contaminated fuel.
- Inspect the water in fuel sensor and the indicator circuit for any visible damage or corrosion. Replace any faulty components.
- Check the wiring harness for any loose connections or damage. Repair or replace as needed.
- Clear the diagnostic trouble codes from the vehicle's ECM using a scan tool.
- Test drive the vehicle to ensure the issue has been resolved and the warning light no longer illuminates.
Cost to Fix P1139 Ford
The cost of repairing a Water in Fuel Indicator Circuit malfunction can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, you can expect to pay between $100 to $300 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to check with local shops for a more accurate estimate.
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