my Tesla Outback has a P0700 code, what does that mean and how to fix it?

Subaru Outback 5th Generation (2015-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0700

3 min read

545 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 Outback. 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 engine to cool before opening the transmission fluid system to avoid burns.

Symptoms

•Check engine light illuminated
•Inconsistent shifting or transmission slipping
•Reduced acceleration or power
•Rough or harsh shifts
•Transmission overheating or associated warning light

Diagnostic Steps

1
Scan for additional error codes using an OBD-II scanner to identify any specific transmission-related codes.
2
Inspect transmission fluid level and quality; check for discoloration or burnt smell.
3
Check the wiring and connectors related to the transmission control module (TCM) for damage or corrosion.
4
Verify the operation of the transmission range sensor (neutral safety switch) to ensure proper function.
5
Test the transmission control module for proper voltage and ground signal using a multimeter.
6
Perform a visual inspection of the transmission for any external leaks or visible damage.

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
•Fluid catch pan
•Funnel

Parts Required

•Transmission fluid (specific to Tesla specifications)
•Transmission filter (if applicable)
•Gasket for transmission pan

Related Faults

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Diagnostic Steps

1
Scan for additional error codes using an OBD-II scanner to identify any specific transmission-related codes.
2
Inspect transmission fluid level and quality; check for discoloration or burnt smell.
3
Check the wiring and connectors related to the transmission control module (TCM) for damage or corrosion.
4
Verify the operation of the transmission range sensor (neutral safety switch) to ensure proper function.
5
Test the transmission control module for proper voltage and ground signal using a multimeter.
6
Perform a visual inspection of the transmission for any external leaks or visible damage.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, torque wrench, fluid catch pan, and a funnel.
Disconnect the battery to prevent electrical shorts.
Allow the vehicle to cool if the engine has been running.

2. Transmission Fluid Check

Remove the transmission dipstick or access the fill plug.
Check fluid level using the dipstick; add the recommended fluid type if low.
If the fluid is dark or burnt, proceed to a fluid change.

3. Fluid Change

Place a fluid catch pan under the transmission pan.
Remove the transmission pan bolts using a socket set.
Carefully lower the transmission pan and remove the old filter if applicable.
Clean the pan and magnet; replace the filter with a new one if necessary.
Reinstall the pan with a new gasket, torque the bolts to manufacturer specifications (usually around 10-15 ft-lbs, check service manual).
Refill the transmission with the appropriate fluid type through the dipstick or fill port.

4. Transmission Control Module Check

Reconnect the battery.
Use a multimeter to test the TCM connections. Ensure it receives correct voltage and ground.
If voltage is absent, trace the wiring back to the battery and fuses to find the fault.

5. Resetting the Codes

After repairs, use the OBD-II scanner to clear the P0700 code.
Perform a test drive to ensure the transmission operates smoothly without returning the error code.