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Engine-Codes – Ford – P1900 1997 Ford F150

P1900 1997 Ford F150 Code - Output Shaft Speed Circuit Intermittent Malfunction

Quick Answer

The P1900 diagnostic trouble code (DTC) for a 1997 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 engine control module (ECM). 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 1997 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 engine control module (ECM).
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 16, 2024
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Code P1900 1997 Ford F150 Description

The P1900 diagnostic trouble code (DTC) for a 1997 Ford F150 indicates an intermittent malfunction in the output shaft speed circuit. The output shaft speed sensor is a critical component of the vehicle's transmission system, responsible for monitoring the speed of the output shaft and providing this information to the engine control module (ECM). This data is essential for the ECM to make necessary adjustments to ensure optimal performance and efficiency of the transmission.

OBDII Code P1900 1997 Ford F150 - Output Shaft Speed Circuit Intermittent Malfunction
P1900 1997 Ford F150 Code - Output Shaft Speed Circuit Intermittent Malfunction

Common Causes of P1900 1997 Ford F150

  1. Faulty output shaft speed sensor
  2. Damaged wiring or connectors in the circuit
  3. Malfunctioning engine control module (ECM)
  4. Transmission issues such as internal damage or wear
  5. Corrosion or contamination affecting sensor readings

Symptoms of P1900 1997 Ford F150

  1. Erratic shifting of gears
  2. Delayed engagement when shifting
  3. Transmission slipping
  4. Reduced fuel efficiency
  5. Illumination of the check engine light

How to Fix P1900 1997 Ford F150

  1. Begin by using a diagnostic scanner to retrieve the trouble codes and confirm the presence of the P1900 code.
  2. Inspect the output shaft speed sensor, wiring, and connectors for any visible damage or corrosion. Replace or repair as needed.
  3. Test the output shaft speed sensor using a multimeter to ensure it is functioning correctly.
  4. Check the ECM for any signs of malfunction and reprogram or replace if necessary.
  5. Clear the trouble codes, reset the ECM, and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P1900 1997 Ford F150

The typical repair costs for addressing a P1900 code on a 1997 Ford F150 can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of replacing an output shaft speed sensor can range from $100 to $200, while addressing wiring or connector issues may add additional labor costs. If the ECM needs to be replaced, this can significantly increase the overall repair expenses.

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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 1997 Ford F150 Code

1. What are the common symptoms of OBDII code P1900 in a 1997 Ford F150?

- Common symptoms include erratic shifting, harsh shifting, transmission slipping, and illuminated Check Engine Light.

2. What does the Output Shaft Speed Circuit Intermittent Malfunction mean in a 1997 Ford F150?

- This code indicates a problem with the transmission output shaft speed sensor circuit, which monitors the speed of the output shaft to help with shifting and overall transmission performance.

3. What are the possible causes of OBDII code P1900 in a 1997 Ford F150?

- Possible causes include a faulty output shaft speed sensor, damaged wiring or connectors in the sensor circuit, transmission fluid issues, or a malfunctioning PCM.

4. How can I diagnose the Output Shaft Speed Circuit Intermittent Malfunction in a 1997 Ford F150?

- Diagnosis involves using a scan tool to retrieve the trouble codes, testing the output shaft speed sensor and its circuit for continuity and proper voltage, and inspecting wiring and connectors for damage.

5. Are there any DIY repair tips for fixing OBDII code P1900 in a 1997 Ford F150?

- DIY repair tips include checking and cleaning the sensor connector, inspecting and repairing damaged wiring, replacing the output shaft speed sensor if necessary, and clearing the trouble codes with a scan tool.

6. Is it safe to continue driving a 1997 Ford F150 with the Output Shaft Speed Circuit Intermittent Malfunction code?

- It is not recommended to drive the vehicle with this code present, as it can lead to transmission issues and potential further damage if left unresolved.

7. Can resetting the Check Engine Light fix OBDII code P1900 in a 1997 Ford F150?

- Resetting the Check Engine Light may temporarily turn it off, but it will not fix the underlying issue causing the Output Shaft Speed Circuit Intermittent Malfunction.

8. How much does it typically cost to repair OBDII code P1900 in a 1997 Ford F150?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Will OBDII code P1900 cause the transmission to stop working completely in a 1997 Ford F150?

- While the transmission may not stop working completely, OBDII code P1900 can lead to transmission issues such as erratic shifting or slipping if not addressed promptly.

10. Can a mechanic easily fix OBDII code P1900 in a 1997 Ford F150?

- A qualified mechanic with experience in diagnosing and repairing transmission issues should be able to address and fix the Output Shaft Speed Circuit Intermittent Malfunction in a 1997 Ford F150.

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