why does my Ford Explorer Sixth Generation (2020-present) have a check transmission light on

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

597 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 the check transmission light issue in Ford Explorer (2020-present). Step-by-step guide with diagnostic procedures 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 the engine to cool before inspecting or working on the transmission.

Symptoms

•Check transmission light illuminated on the dashboard
•Slipping gears or delayed engagement when shifting
•Unusual noises coming from the transmission (e.g., grinding or whining)
•Rough or harsh shifting during acceleration
•Decreased fuel efficiency
•Transmission fluid leak under the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; inspect for contamination or burnt smell.
3
Inspect the transmission wiring harness and connectors for damage or corrosion.
4
Test the transmission range sensor for proper function using a multimeter.
5
Monitor the vehicle’s performance while driving to replicate symptoms and observe behavior.
6
Examine the transmission filter for clogging or obstructions, if applicable.

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
•Transmission fluid pump (if necessary)

Parts Required

•Transmission fluid
•Transmission filter (if applicable)
•Gasket for transmission pan
•Transmission range sensor (if replacement is necessary)

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Symptoms

•Check transmission light illuminated on the dashboard

•Slipping gears or delayed engagement when shifting

•Unusual noises coming from the transmission (e.g., grinding or whining)

•Rough or harsh shifting during acceleration

•Decreased fuel efficiency

•Transmission fluid leak under the vehicle

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; inspect for contamination or burnt smell.
3
Inspect the transmission wiring harness and connectors for damage or corrosion.
4
Test the transmission range sensor for proper function using a multimeter.
5
Monitor the vehicle’s performance while driving to replicate symptoms and observe behavior.
6
Examine the transmission filter for clogging or obstructions, if applicable.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface, and engage the parking brake.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Remove the transmission dipstick and wipe it clean.
2. Insert the dipstick back and remove it again to check the fluid level.
3. If low, add the appropriate transmission fluid (refer to the owner’s manual for specifications).
4. If fluid is dark or has a burnt smell, drain the transmission fluid and replace it.
5. To drain, remove the transmission pan bolts and carefully lower the pan to allow fluid to escape.
6. Replace the transmission filter if applicable, ensuring the new filter is secured properly.
7. Reinstall the transmission pan with a new gasket and torque bolts to the manufacturer’s specifications.

3. Inspect and Repair Wiring

Sub-steps:
1. Visually inspect the wiring harness connected to the transmission for any damage or fraying.
2. Use a multimeter to test continuity of the wiring and repair any damaged sections.
3. Clean any corrosion from connectors using electrical contact cleaner.

4. Replace Transmission Range Sensor (if necessary)

Sub-steps:
1. Locate the transmission range sensor; typically attached to the transmission casing.
2. Disconnect the electrical connector from the sensor.
3. Remove the mounting bolts securing the sensor and take it out.
4. Install the new transmission range sensor and secure it with bolts.
5. Reconnect the electrical connector.

5. Reconnect Battery and Test

Reconnect the negative battery terminal.
Start the vehicle and check for the check transmission light.
Test drive the vehicle to ensure proper operation and shifting.