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P0188 Ford Code - Engine Fuel Temperature Sensor 'B' Circuit High Input

Quick Answer

The P0188 Ford diagnostic trouble code (DTC) indicates that the Engine Fuel Temperature Sensor 'B' Circuit is detecting a high input. Common causes include Faulty fuel temperature sensor, Wiring issues in the sensor circuit, ECM malfunction. 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
P0188 Ford indicates Engine Fuel Temperature Sensor 'B' Circuit High Input.
Common causes
Common causes include Faulty fuel temperature sensor, Wiring issues in the sensor circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P0188 Ford Description

The P0188 Ford diagnostic trouble code (DTC) indicates that the Engine Fuel Temperature Sensor 'B' Circuit is detecting a high input. This sensor is responsible for measuring the temperature of the fuel in the engine's fuel system. When the sensor detects a high input, it means that the fuel temperature is higher than expected, which can lead to various issues with the vehicle's performance.

OBDII Code P0188 Ford - Engine Fuel Temperature Sensor 'B' Circuit High Input
P0188 Ford Code - Engine Fuel Temperature Sensor 'B' Circuit High Input

Common Causes of P0188 Ford

  1. Faulty fuel temperature sensor
  2. Wiring issues in the sensor circuit
  3. ECM malfunction
  4. High ambient temperatures affecting fuel temperature readings
  5. Contaminated fuel affecting sensor accuracy

Symptoms of P0188 Ford

  1. Decreased fuel efficiency
  2. Reduced engine power
  3. Engine knocking or pinging
  4. Check Engine Light illuminated
  5. Rough idling or stalling

How to Fix P0188 Ford

  1. Use a diagnostic tool to read the code and confirm the issue with the fuel temperature sensor.
  2. Inspect the sensor and its wiring for any visible damage or corrosion.
  3. Test the sensor's resistance with a multimeter to determine if it is functioning correctly.
  4. Replace the fuel temperature sensor if it is found to be faulty.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0188 Ford

The cost of repairing P0188 Ford can vary depending on the specific make and model of the vehicle, as well as the labor rates in your area. On average, the repair cost for this issue can range from $150 to $300, including parts and labor. It's essential to consult with a qualified mechanic to get a more accurate estimate based on your vehicle's specific needs.

When is the Code Detected?

An excessively high voltage is sent to Powertrain Control Module (PCM) by the Engine Fuel Temperature (EFT) Sensor.

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Information for Specific Ford Models

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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