how to troubleshoot a Ford F-150 13th Generation (2015-2020) that won't shift into gear

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

587 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 troubleshoot and fix shifting issues in Ford F-150 13th Generation (2015-2020). Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems
•Allow engine to cool before inspecting the transmission

Symptoms

•Transmission warning light illuminated on the dashboard
•Difficulty shifting between Park, Reverse, Neutral, and Drive
•Grinding noise when attempting to shift
•Engine revs without acceleration
•Fluid leaks under the vehicle
•Transmission fluid appears burnt or discolored

Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect transmission fluid levels with engine running and warm
3
Examine transmission fluid for proper color and consistency
4
Check the transmission range sensor functionality
5
Inspect wiring and connectors related to the transmission control module
6
Test the brake light switch functionality

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
•Socket set
•Torque wrench
•Multimeter
•Transmission fluid dipstick

Parts Required

•Transmission range sensor
•Brake light switch
•Transmission fluid

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Diagnostic Steps

1
Scan for error codes using OBD-II scanner
2
Inspect transmission fluid levels with engine running and warm
3
Examine transmission fluid for proper color and consistency
4
Check the transmission range sensor functionality
5
Inspect wiring and connectors related to the transmission control module
6
Test the brake light switch functionality

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, transmission fluid dipstick.
Safety Warnings: Disconnect the battery before working on electrical systems; allow engine to cool before inspecting the transmission.

2. Address Transmission Fluid Issues

Sub-steps:
1. If fluid is low, add the appropriate type of transmission fluid (consult owner's manual for specifications).
2. If fluid is burnt or dirty, drain the transmission fluid using a socket set to remove the drain plug.
3. Replace the fluid with new fluid, ensuring to fill to the proper level.

3. Repair or Replace the Transmission Range Sensor

Sub-steps:
1. Locate the transmission range sensor on the transmission housing.
2. Unplug the electrical connector and remove the mounting bolts using a socket set.
3. Install the new sensor, ensuring it is aligned correctly, and secure it with the bolts.
4. Reconnect the electrical connector.

4. Inspect and Repair Electrical Connections

Sub-steps:
1. Visually check all wiring harnesses connected to the TCM and transmission for wear or damage.
2. Use a multimeter to test for continuity in suspect wiring.
3. Repair any damaged wires or connectors as necessary.

5. Replace the Brake Light Switch (if faulty)

Sub-steps:
1. Locate the brake light switch, usually mounted near the brake pedal.
2. Disconnect the wiring harness from the switch and remove it from its mounting.
3. Install the new brake light switch and reconnect the wiring harness.