Engine-CodesMercury – P1140 Mercury

P1140 Mercury Code - Water In Fuel Condition

Quick Answer

The P1140 diagnostic trouble code (DTC) on a Mercury vehicle indicates a "Water In Fuel Condition." This means that there is water present in the fuel system, which can lead to various issues with the vehicle's performance and overall functionality. Common causes include Driving through deep water or flooded roads, Poor quality fuel, Fuel tank condensation. 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
P1140 Mercury indicates Water In Fuel Condition.
Common causes
Common causes include Driving through deep water or flooded roads, Poor quality fuel, Fuel tank condensation.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1140 Mercury Description

The P1140 diagnostic trouble code (DTC) on a Mercury vehicle indicates a "Water In Fuel Condition." This means that there is water present in the fuel system, which can lead to various issues with the vehicle's performance and overall functionality. Water in the fuel can cause misfiring, rough idling, stalling, poor acceleration, and even engine damage if left untreated.

OBDII Code P1140 Mercury - Water In Fuel Condition
P1140 Mercury Code - Water In Fuel Condition

Common Causes of P1140 Mercury

  1. Driving through deep water or flooded roads
  2. Poor quality fuel
  3. Fuel tank condensation
  4. Damaged fuel cap
  5. Faulty fuel filter

Symptoms of P1140 Mercury

  1. Rough idling
  2. Stalling
  3. Misfiring
  4. Poor acceleration
  5. Check engine light illuminated

How to Fix P1140 Mercury

  1. Drain the fuel tank to remove the water and contaminated fuel.
  2. Replace the fuel filter to prevent further contamination.
  3. Inspect the fuel lines and fuel pump for any signs of corrosion or damage.
  4. Check the fuel tank for leaks or other issues that may have allowed water to enter.
  5. Use a fuel system cleaner to remove any remaining water or contaminants from the fuel system.

Cost to Fix P1140 Mercury

The cost of repairing a water in fuel condition on a Mercury vehicle can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the cost of draining the fuel tank, replacing the fuel filter, and inspecting the fuel system can range from $200 to $500. Additional costs may apply if there is damage to the fuel pump or other components that require replacement. It is advisable to consult with a professional mechanic for a more accurate estimate based on the specific issues present in your vehicle. Labor costs can range from $80 to $150 per hour, and rates may vary based on location and the repair shop's pricing structure.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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