how to fix P0700 code in my 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

532 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.
•Ensure the vehicle is properly supported if working underneath.

Symptoms

•Check engine light illuminated
•Erratic shifting or difficulty shifting gears
•Reduced power or acceleration
•Transmission slipping or harsh engagement
•Unexpected changes in the drive mode
•Increased energy consumption

Diagnostic Steps

1
Scan the vehicle's onboard diagnostics using an OBD-II scanner to confirm the P0700 code and any related codes.
2
Inspect the transmission fluid level and condition; low or contaminated fluid can cause transmission issues.
3
Check the wiring and connectors related to the transmission control module for damage or corrosion.
4
Examine the transmission control module (TCM) for any fault codes or malfunctions.
5
Perform a visual inspection of the transmission for leaks, damage, or other signs of wear.
6
Test the transmission fluid temperature sensor for proper operation.

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
•Fluid pump
•Electrical contact cleaner

Parts Required

•Transmission fluid (Tesla recommended type)
•Transmission control module (if replacement is necessary)
•Electrical connectors or wiring (if needed)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostics using an OBD-II scanner to confirm the P0700 code and any related codes.
2
Inspect the transmission fluid level and condition; low or contaminated fluid can cause transmission issues.
3
Check the wiring and connectors related to the transmission control module for damage or corrosion.
4
Examine the transmission control module (TCM) for any fault codes or malfunctions.
5
Perform a visual inspection of the transmission for leaks, damage, or other signs of wear.
6
Test the transmission fluid temperature sensor for proper operation.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Disconnect the vehicle’s 12V battery to avoid any electrical issues during repair.

2. Inspect and Replace Transmission Fluid

Sub-steps:
1. Remove the transmission fluid access panel if applicable.
2. Use a fluid pump to extract the old transmission fluid.
3. Replace the transmission fluid with the manufacturer-recommended fluid, ensuring the fluid meets Tesla specifications.
4. Reinstall the access panel securely.

3. Repair or Replace Wiring/Connectors

Sub-steps:
1. Identify and locate the damaged wiring or connectors related to the TCM.
2. Repair any damaged wires with appropriate automotive wire and connectors.
3. If the connector is corroded, clean it with electrical contact cleaner and ensure a tight fit.
4. Reconnect all wiring and ensure no loose connections exist.

4. Test and Replace TCM (if necessary)

Sub-steps:
1. If previous steps do not resolve the issue, remove the TCM by unscrewing the mounting bolts.
2. Disconnect the wiring harness from the TCM.
3. Install the new TCM by reversing the removal process, ensuring all connectors are secure.
4. Reconnect the battery and clear any stored codes with the OBD-II scanner.