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Engine-Codes – Ford – P1900 1999 Ford F150

P1900 1999 Ford F150 Code - Output Shaft Speed Circuit Intermittent Malfunction

Quick Answer

The P1900 diagnostic trouble code (DTC) for a 1999 Ford F150 indicates an intermittent malfunction in the output shaft speed circuit. Common causes include Faulty output shaft speed sensor, Damaged wiring or connectors in the circuit, Malfunctioning TCM. 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
P1900 1999 Ford F150 indicates Output Shaft Speed Circuit Intermittent Malfunction.
Common causes
Common causes include Faulty output shaft speed sensor, Damaged wiring or connectors in the circuit, Malfunctioning TCM.
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 17, 2024
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Code P1900 1999 Ford F150 Description

The P1900 diagnostic trouble code (DTC) for a 1999 Ford F150 indicates an intermittent malfunction in the output shaft speed circuit. The output shaft speed sensor is a crucial component of the vehicle's transmission system, responsible for monitoring the speed of the output shaft. This information is essential for the transmission control module (TCM) to adjust shift points, optimize performance, and ensure smooth operation of the transmission.

OBDII Code P1900 1999 Ford F150 - Output Shaft Speed Circuit Intermittent Malfunction
P1900 1999 Ford F150 Code - Output Shaft Speed Circuit Intermittent Malfunction

Common Causes of P1900 1999 Ford F150

  1. Faulty output shaft speed sensor
  2. Damaged wiring or connectors in the circuit
  3. Malfunctioning TCM
  4. Transmission issues
  5. Corrosion or contamination in the sensor or circuit

Symptoms of P1900 1999 Ford F150

  1. Erratic shifting behavior
  2. Harsh or delayed gear engagement
  3. Transmission slipping
  4. Illumination of the Check Engine Light
  5. Reduced fuel efficiency

How to Fix P1900 1999 Ford F150

  1. Diagnose the issue using a scan tool to retrieve the specific trouble code and identify the root cause of the problem.
  2. Inspect the output shaft speed sensor, wiring, and connectors for any signs of damage or corrosion. Replace any faulty components.
  3. Test the TCM and ensure it is functioning correctly. Replace if necessary.
  4. Clear the DTC and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the intermittent malfunction.

Cost to Fix P1900 1999 Ford F150

The typical repair costs for addressing a P1900 code on a 1999 Ford F150 can vary depending on the specific cause of the issue. On average, the parts required for this repair, such as a new output shaft speed sensor or TCM, may range from $100 to $300. Labor costs can add an additional $100 to $200, with total repair expenses falling between $200 and $500. It is important to note that these estimates are general guidelines, and actual costs may vary based on factors such as location, vehicle make and model, and the extent of the repairs needed. It is recommended to consult with a trusted mechanic or auto repair shop for a more accurate cost estimate tailored to your specific situation.

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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 P1900 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P1900 on a 1999 Ford F150?

The common symptoms of OBDII code P1900 on a 1999 Ford F150 include erratic shifting, hesitation during acceleration, and illuminated Check Engine Light.

2. What does the OBDII code P1900 indicate in a 1999 Ford F150?

OBDII code P1900 in a 1999 Ford F150 specifically refers to an Output Shaft Speed Circuit Intermittent Malfunction.

3. What are the possible causes of OBDII code P1900 on a 1999 Ford F150?

The possible causes of OBDII code P1900 on a 1999 Ford F150 include a faulty output shaft speed sensor, damaged wiring or connectors, or a malfunctioning transmission control module.

4. How can I diagnose the OBDII code P1900 on my 1999 Ford F150?

To diagnose OBDII code P1900 on a 1999 Ford F150, you can use a scan tool to retrieve the trouble codes, inspect the output shaft speed sensor and its wiring for any visible damage, and test the sensor's resistance with a multimeter.

5. Can I continue driving my 1999 Ford F150 with OBDII code P1900?

It is not recommended to continue driving your 1999 Ford F150 with OBDII code P1900, as it can lead to further damage to the transmission and potentially cause unsafe driving conditions.

6. How can I repair OBDII code P1900 on a 1999 Ford F150?

To repair OBDII code P1900 on a 1999 Ford F150, you may need to replace the faulty output shaft speed sensor, repair any damaged wiring or connectors, or reprogram the transmission control module.

7. Is it possible to reset the OBDII code P1900 on a 1999 Ford F150 without fixing the underlying issue?

Resetting the OBDII code P1900 on a 1999 Ford F150 without fixing the underlying issue is not recommended, as the problem will likely reoccur and may cause further damage to the vehicle.

8. How much does it cost to repair OBDII code P1900 on a 1999 Ford F150?

The cost to repair OBDII code P1900 on a 1999 Ford F150 can vary depending on the specific issue, but it may range from $100 to $500, including parts and labor.

9. Are there any preventive measures to avoid OBDII code P1900 on a 1999 Ford F150?

Regular maintenance of the transmission system, including checking and replacing sensors as needed, can help prevent OBDII code P1900 on a 1999 Ford F150.

10. Can a DIY enthusiast without much experience fix OBDII code P1900 on a 1999 Ford F150?

While some aspects of diagnosing and repairing OBDII code P1900 on a 1999 Ford F150 can be done by a DIY enthusiast, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair.

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