how to fix P0700 code in Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0700

3 min read

571 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 P0700 transmission control malfunction in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0700

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 vehicle to cool before inspecting or replacing transmission fluid.

Symptoms

•Check engine light illuminated
•Erratic shifting or inability to shift gears
•Loss of power during acceleration
•Unexpected vehicle stalling
•Reduced fuel efficiency
•Transmission overheating warnings

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0700 and any associated transmission codes.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burning.
3
Check the transmission wiring harness and connectors for any signs of damage or corrosion.
4
Verify the operation of the transmission control module (TCM) by testing voltage and ground signals.
5
Test the transmission fluid temperature sensor if applicable, ensuring it operates within specification.
6
Review the vehicle’s history for any recent repairs or services that could influence the transmission system.

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
•Multimeter
•Transmission fluid gauge
•Torque wrench

Parts Required

•Transmission fluid (specific type per owner's manual)
•Transmission filter (if applicable)
•Transmission control module (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0700 and any associated transmission codes.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burning.
3
Check the transmission wiring harness and connectors for any signs of damage or corrosion.
4
Verify the operation of the transmission control module (TCM) by testing voltage and ground signals.
5
Test the transmission fluid temperature sensor if applicable, ensuring it operates within specification.
6
Review the vehicle’s history for any recent repairs or services that could influence the transmission system.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, multimeter, transmission fluid gauge, torque wrench.
Gather all necessary replacement parts and tools before starting the repair.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.

2. Fluid Inspection and Replacement

Check Transmission Fluid Level:
- Locate the transmission dipstick (if equipped) and remove it.
- Wipe clean, reinsert, and then remove to check fluid level.
- If low, add the recommended transmission fluid type (consult the owner's manual).
Replace Transmission Fluid:
- Drain the old transmission fluid by removing the drain plug using a socket set.
- Replace the drain plug and torque to manufacturer specifications.
- Refill the transmission with new fluid through the dipstick tube or fill port, using a funnel.

3. Electrical System Inspection

Inspect Wiring and Connectors:
- Disconnect the battery to ensure safety.
- Visually inspect the transmission wiring harness for wear, fraying, or disconnection.
- Clean any corroded connectors with electrical contact cleaner.
Test TCM and Sensors:
- Reconnect the battery and use a multimeter to test the TCM's voltage and ground.
- If the TCM is faulty, replace it according to manufacturer specifications.

4. Clear Codes and Test Drive

Reset the System:
- Use the OBD-II scanner to clear any stored codes after completing repairs.
- Perform a test drive to ensure proper shifting and that the check engine light does not reappear.