how to fix P0708 code on Ford F-150 13th Generation (2015-2020)

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0708

3 min read

589 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 P0708 code related to the Transmission Range Sensor in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0708

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or shorts.
•Allow the engine to cool before working on the transmission.

Symptoms

•Check engine light illuminated
•Transmission stuck in a single gear or fails to shift
•Erratic shifting or harsh engagement
•Vehicle may not start in 'Park' or 'Neutral'
•Potential loss of power or acceleration

Diagnostic Steps

1
Scan the vehicle's onboard diagnostic system using an OBD-II scanner to confirm the P0708 code and check for any additional codes.
2
Inspect the Transmission Range Sensor wiring and connectors for signs of damage, corrosion, or loose connections.
3
Measure the voltage and resistance of the Transmission Range Sensor with a multimeter to determine if it is functioning within specifications.
4
Check the TCM for any software updates or known issues that could affect transmission performance.
5
Inspect the vehicle’s transmission fluid level and condition, as low or contaminated fluid can impact shifting.

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
•Screwdriver set

Parts Required

•New Transmission Range Sensor
•Transmission fluid (if needed)

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostic system using an OBD-II scanner to confirm the P0708 code and check for any additional codes.
2
Inspect the Transmission Range Sensor wiring and connectors for signs of damage, corrosion, or loose connections.
3
Measure the voltage and resistance of the Transmission Range Sensor with a multimeter to determine if it is functioning within specifications.
4
Check the TCM for any software updates or known issues that could affect transmission performance.
5
Inspect the vehicle’s transmission fluid level and condition, as low or contaminated fluid can impact shifting.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Replace the Transmission Range Sensor

Step 1: Locate the Sensor
- The Transmission Range Sensor is typically mounted on the side of the transmission. Refer to the vehicle’s service manual for exact location.
Step 2: Disconnect Wiring Harness
- Carefully unclip and disconnect the electrical connector from the sensor.
Step 3: Remove the Old Sensor
- Use a socket set to remove the bolts securing the sensor to the transmission.
- Gently pull the sensor out, ensuring no debris falls into the transmission.
Step 4: Install the New Sensor
- Apply a small amount of clean transmission fluid to the O-ring of the new sensor.
- Position the new sensor in place and secure it with the bolts, torquing them to manufacturer specifications (consult service manual for exact torque values).
Step 5: Reconnect Wiring Harness
- Plug the electrical connector back into the new sensor until it clicks securely.

3. Refill Transmission Fluid (if needed)

If transmission fluid was lost during sensor replacement, top off with the manufacturer-recommended fluid type.

4. Reconnect Battery

Reconnect the negative battery terminal and ensure it is secured.

5. Clear Codes and Test

Use the OBD-II scanner to clear the P0708 code and any other stored codes.
Start the vehicle and run through the gears to ensure proper function.