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P0187 1997 Ford F150 Code - Engine Fuel Temperature Sensor B Circuit Low Input

Quick Answer

The P0187 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates that there is a low input signal from the engine fuel temperature sensor B circuit. Common causes include Faulty engine fuel temperature sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor 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
P0187 1997 Ford F150 indicates Engine Fuel Temperature Sensor B Circuit Low Input .
Common causes
Common causes include Faulty engine fuel temperature sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0187 1997 Ford F150 Description

The P0187 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates that there is a low input signal from the engine fuel temperature sensor B circuit. This sensor is responsible for monitoring the temperature of the fuel in the engine's fuel system. The engine fuel temperature sensor plays a crucial role in ensuring the proper functioning of the engine by providing data to the engine control module (ECM) to adjust fuel delivery and ignition timing accordingly.

OBDII Code P0187 1997 Ford F150 - Engine Fuel Temperature Sensor B Circuit Low Input
P0187 1997 Ford F150 Code - Engine Fuel Temperature Sensor B Circuit Low Input

Common Causes of P0187 1997 Ford F150

  1. Faulty engine fuel temperature sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Corrosion or poor connections in the sensor circuit
  4. Malfunctioning ECM
  5. Exposure to extreme temperatures or contaminants

Symptoms of P0187 1997 Ford F150

  1. Decreased fuel efficiency
  2. Engine running rich or lean
  3. Rough idling or stalling
  4. Reduced power output
  5. Check Engine Light illuminated

How to Fix P0187 1997 Ford F150

  1. Begin by using a diagnostic scan tool to retrieve the trouble code and confirm the issue with the engine fuel temperature sensor B circuit.
  2. Inspect the sensor, wiring, and connectors for any visible damage or corrosion. Replace any damaged components as needed.
  3. Test the sensor's resistance and voltage output to ensure it is functioning within the manufacturer's specifications.
  4. Clear the trouble code from the ECM's memory using the scan tool and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the sensor circuit or ECM.

Cost to Fix P0187 1997 Ford F150

The typical repair costs for addressing a P0187 code on a 1997 Ford F150 can vary depending on the specific cause of the issue. In general, replacing a faulty engine fuel temperature sensor can cost between $50 and $150, while repairing damaged wiring or connectors may range from $100 to $200. Labor costs at auto repair shops can vary between $80 and $150 per hour, with additional charges for diagnostic time and any necessary parts. It is advisable to consult with a qualified mechanic or service center to obtain a more accurate estimate based on the vehicle's make and model, as well as the local labor rates.

What does this mean?

Tech Notes for P0187 1997 Ford F150

Replace Fuel Temperature Sensor.

The comprehensive component monitor (CCM) monitors the EFT sensor circuit to the PCM for low voltage. If voltage were to fall below a calibrated limit and amount of time during testing, the test will fail.

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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.

Frequently Asked Questions about P0187 1997 Ford F150 Code

1. What does the OBDII code P0187 mean on a 1997 Ford F150?

P0187 indicates that the Engine Control Module (ECM) has detected a low input voltage issue in the Fuel Temperature Sensor B circuit.

2. What are the common symptoms of code P0187 on a 1997 Ford F150?

Symptoms may include poor fuel efficiency, rough idling, difficulty starting, reduced engine performance, and the Check Engine Light being illuminated.

3. What causes the P0187 code to appear on a 1997 Ford F150?

Common causes include a faulty fuel temperature sensor, damaged or corroded wiring, loose connections, or a malfunctioning ECM.

4. Can driving with the P0187 code cause further damage to my 1997 Ford F150?

While it may not immediately cause severe damage, ignoring the issue could lead to poor engine performance and potential long-term damage to fuel system components.

5. How do I diagnose the P0187 code on a 1997 Ford F150?

Start by inspecting the wiring and connectors for damage or corrosion, test the fuel temperature sensor with a multimeter, and use a scan tool to monitor sensor data.

6. How do I fix the P0187 code on a 1997 Ford F150?

Common fixes include replacing the faulty fuel temperature sensor, repairing damaged wiring, securing loose connectors, or replacing the ECM if necessary.

7. Where is the fuel temperature sensor located on a 1997 Ford F150?

The fuel temperature sensor is typically located on or near the fuel rail or within the fuel tank, depending on the vehicle's design.

8. How much does it cost to repair the P0187 code on a 1997 Ford F150?

Repair costs can vary, but replacing a fuel temperature sensor typically ranges from $50 to $200, while wiring repairs or ECM replacements may cost more.

9. Can a bad fuel temperature sensor cause other issues besides triggering code P0187?

Yes, a bad sensor can lead to incorrect fuel-air mixture adjustments, poor engine performance, and decreased fuel efficiency.

10. Do I need professional help to fix the P0187 code on my 1997 Ford F150?

If you’re experienced with automotive diagnostics and repairs, you can attempt to fix it yourself. Otherwise, it’s best to seek help from a professional mechanic.

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