what does it mean if my Ford Explorer Fifth Generation (2011-2019) has a check transmission light

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

620 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 (2011-2019). Step-by-step guide with symptoms, 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 the engine to cool before opening the transmission pan to avoid burns.

Symptoms

•Check transmission light illuminated on the dashboard
•Slipping or delayed shifting between gears
•Unusual noises when the vehicle is in gear (grinding or whining)
•Harsh or erratic shifting
•Loss of power during acceleration
•Fluid leaks under the vehicle

Diagnostic Steps

1
Scan the vehicle's onboard diagnostic system using an OBD-II scanner to retrieve any stored error codes.
2
Check the transmission fluid level and condition, ensuring it is at the correct level and not burnt or contaminated.
3
Inspect the transmission for any visible leaks or damage to components such as the solenoid pack or transmission lines.
4
Test the battery and charging system to ensure proper electrical supply to the transmission control module.
5
Perform a road test to observe the behavior of the transmission under various driving conditions.
6
Check for any TSBs (Technical Service Bulletins) related to transmission issues for the specific model year.

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
•Drain pan
•Funnel

Parts Required

•Transmission fluid (Mercon LV)
•Transmission filter
•Gasket or gasket maker

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostic system using an OBD-II scanner to retrieve any stored error codes.
2
Check the transmission fluid level and condition, ensuring it is at the correct level and not burnt or contaminated.
3
Inspect the transmission for any visible leaks or damage to components such as the solenoid pack or transmission lines.
4
Test the battery and charging system to ensure proper electrical supply to the transmission control module.
5
Perform a road test to observe the behavior of the transmission under various driving conditions.
6
Check for any TSBs (Technical Service Bulletins) related to transmission issues for the specific model year.

Solution

1. Preparation

Gather necessary tools and parts before starting the repair.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Disconnect the battery to prevent electrical shock during the repair.

2. Fluid Change

Drain Transmission Fluid
- Place a drain pan under the transmission pan.
- Remove the transmission pan bolts using a socket set.
- Carefully lower the pan to allow old fluid to drain completely.
Replace Transmission Filter
- Remove the old transmission filter by unfastening any retaining clips or screws.
- Install the new filter, ensuring it is seated properly.
Clean the Pan
- Clean the transmission pan thoroughly to remove any debris or old gasket material.
- Inspect the magnet on the pan for metal shavings and clean it if necessary.
Reinstall Transmission Pan
- Apply a new gasket or gasket maker to the pan.
- Securely reattach the pan with the bolts, tightening them to the manufacturer-specified torque values (typically around 8-10 ft-lbs).

3. Electrical Inspection

Inspect Wiring and Connectors
- Check the wiring harness leading to the transmission for any signs of damage or corrosion.
- Ensure all connectors are securely attached.
Test Transmission Control Module (TCM)
- Use a multimeter to test the TCM for proper voltage and ground readings.
- Replace the TCM if it is found to be faulty after testing.

4. Refill Transmission Fluid

Using a funnel, refill the transmission with the recommended fluid type (usually Mercon LV for Ford vehicles).
Start the engine and cycle through all gears to allow fluid to circulate.
Check the fluid level again and add more if necessary.