how to fix P0720 code on Ford F-150 12th Generation (2009-2014)

Ford F-150 12th Generation (2009-2014)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

Error Code: P0720

3 min read

491 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0720 output speed sensor issues in Ford F-150 (2009-2014). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0720

Affected Component

Transmission

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Ensure the vehicle is securely supported before working underneath it.

Symptoms

•Check engine light illuminated
•Erratic or harsh shifting of the transmission
•Speedometer not functioning correctly
•Loss of power during acceleration
•Poor fuel economy

Diagnostic Steps

1
Scan the vehicle's OBD-II system for additional trouble codes and freeze frame data.
2
Inspect the output speed sensor and wiring harness for visible damage or corrosion.
3
Test the output speed sensor resistance with a multimeter according to manufacturer specifications.
4
Check the connector for the output speed sensor for proper engagement and any signs of corrosion or damage.
5
Inspect the vehicle's transmission fluid level and condition.
6
Verify the vehicle’s powertrain control module (PCM) is functioning properly.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Torque wrench
•Screwdrivers

Parts Required

•New output speed sensor
•Transmission fluid (if needed)

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for additional trouble codes and freeze frame data.
2
Inspect the output speed sensor and wiring harness for visible damage or corrosion.
3
Test the output speed sensor resistance with a multimeter according to manufacturer specifications.
4
Check the connector for the output speed sensor for proper engagement and any signs of corrosion or damage.
5
Inspect the vehicle's transmission fluid level and condition.
6
Verify the vehicle’s powertrain control module (PCM) is functioning properly.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the battery to prevent any electrical shorts.
Ensure the vehicle is on a level surface and securely supported.

2. Remove the Output Speed Sensor

Locate the output speed sensor on the transmission (usually at the tail shaft).
Disconnect the electrical connector from the sensor.
Remove the mounting bolt(s) using a socket set.
Carefully pull the sensor out of the transmission.

3. Inspect and Clean

Inspect the old sensor for physical damage or wear.
Clean the sensor mounting area on the transmission to ensure a proper seal for the new sensor.
If the wiring harness is damaged, repair or replace it as necessary.

4. Install New Output Speed Sensor

Apply a small amount of transmission fluid to the O-ring of the new sensor (if applicable).
Insert the new sensor into the transmission and secure it with the mounting bolt(s) to the specified torque (typically around 8-10 ft-lbs).
Reconnect the electrical connector to the new sensor.

5. Reconnect Battery and Test

Reconnect the battery.
Start the engine and allow the vehicle to idle.
Check for any leaks around the sensor area.