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P1900 2009 Ford Fusion Code - Output Shaft Speed Circuit Intermittent Malfunction

Quick Answer

The P1900 diagnostic trouble code (DTC) for a 2009 Ford Fusion indicates an intermittent malfunction in the Output Shaft Speed Circuit. Common causes include Faulty output shaft speed sensor, Loose or corroded connections in the output shaft speed circuit, Wiring harness issues. 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 2009 Ford Fusion indicates Output Shaft Speed Circuit Intermittent Malfunction.
Common causes
Common causes include Faulty output shaft speed sensor, Loose or corroded connections in the output shaft speed circuit, Wiring harness issues.
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 12, 2024
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Code P1900 2009 Ford Fusion Description

The P1900 diagnostic trouble code (DTC) for a 2009 Ford Fusion indicates an intermittent malfunction in the Output Shaft Speed Circuit. This code is related to the vehicle's transmission system, specifically the output shaft speed sensor. The output shaft speed sensor is responsible for monitoring the speed of the transmission output shaft and sending this information to the vehicle's powertrain control module (PCM). This data is crucial for the PCM to determine the appropriate shift points for the transmission and ensure smooth operation.

OBDII Code P1900 2009 Ford Fusion - Output Shaft Speed Circuit Intermittent Malfunction
P1900 2009 Ford Fusion Code - Output Shaft Speed Circuit Intermittent Malfunction

Common Causes of P1900 2009 Ford Fusion

  1. Faulty output shaft speed sensor
  2. Loose or corroded connections in the output shaft speed circuit
  3. Wiring harness issues
  4. PCM software issues
  5. Mechanical issues within the transmission

Symptoms of P1900 2009 Ford Fusion

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

How to Fix P1900 2009 Ford Fusion

  1. Diagnose the issue by using a scan tool to retrieve the DTC and perform a thorough inspection of the output shaft speed sensor and related components.
  2. Check the wiring harness for any signs of damage, corrosion, or loose connections. Repair or replace any damaged wiring.
  3. Test the output shaft speed sensor for proper operation and replace if necessary.
  4. Clear the DTC from the PCM memory and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying mechanical issues within the transmission.

Cost to Fix P1900 2009 Ford Fusion

The cost of repairing a P1900 DTC on a 2009 Ford Fusion can vary depending on the specific cause of the issue. On average, the cost of parts for replacing an output shaft speed sensor can range from $50 to $150, while labor costs can range from $100 to $200. Additional costs may be incurred if wiring repairs or further diagnostics are needed. It's important to note that labor rates at auto repair shops can vary widely, so it's recommended to obtain quotes from multiple shops in your area for a more accurate estimate.

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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 2009 Ford Fusion Code

1. What are the common symptoms of OBDII code P1900 in a 2009 Ford Fusion?

- Common symptoms include erratic shifting, transmission slippage, and the vehicle going into limp mode.

2. What can cause the Output Shaft Speed Circuit Intermittent Malfunction in a 2009 Ford Fusion?

- Possible causes include a faulty output shaft speed sensor, damaged wiring or connectors, or issues with the transmission control module.

3. How can I diagnose the Output Shaft Speed Circuit Intermittent Malfunction on my 2009 Ford Fusion?

- Diagnosis involves using a scan tool to read the OBDII code, checking the output shaft speed sensor and its wiring for damage, and testing the transmission control module.

4. Can a bad output shaft speed sensor be repaired, or does it need to be replaced in a 2009 Ford Fusion?

- In most cases, a faulty output shaft speed sensor will need to be replaced rather than repaired to resolve the P1900 code.

5. Are there any DIY repair tips for fixing the Output Shaft Speed Circuit Intermittent Malfunction on a 2009 Ford Fusion?

- DIY repair tips include checking and cleaning the sensor's connectors, ensuring proper wiring connections, and following a service manual for accurate diagnosis and repair.

6. What are the potential risks of ignoring the P1900 code in a 2009 Ford Fusion?

- Ignoring the P1900 code can lead to further transmission issues, reduced fuel efficiency, and potential damage to other transmission components over time.

7. How much does it typically cost to repair the Output Shaft Speed Circuit Intermittent Malfunction in a 2009 Ford Fusion?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor.

8. Can I continue driving my 2009 Ford Fusion with the P1900 code present?

- It is not recommended to continue driving with the P1900 code, as it can lead to more serious transmission problems and potential safety hazards.

9. Will resetting the OBDII code clear the Output Shaft Speed Circuit Intermittent Malfunction in a 2009 Ford Fusion?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the P1900 code to reappear.

10. How long does it take to repair the Output Shaft Speed Circuit Intermittent Malfunction on a 2009 Ford Fusion?

- Repair time can vary depending on the exact cause of the issue and the availability of parts, but it may take a few hours to a full day for a professional mechanic to diagnose and fix the problem.

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