how to fix P0700 code on Honda Accord 9th Generation (2013-2017)

Honda Accord Eleventh Generation (2023-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0700

4 min read

607 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 system malfunction in Honda Accord 9th Generation. Step-by-step guide with solutions.

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 and transmission to cool before performing any work.

Symptoms

•Check engine light illuminated
•Transmission slipping or erratic shifting
•Harsh shifting between gears
•Reduced fuel efficiency
•Transmission fails to engage or goes into limp mode

Diagnostic Steps

1
Use an OBD-II scanner to retrieve and note any additional transmission-related trouble codes.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burning.
3
Check for any visible leaks around the transmission and associated components.
4
Inspect the wiring and connectors to the transmission control module for damage or corrosion.
5
Perform a transmission fluid pressure test to ensure proper pressure levels.
6
Conduct a road test to observe transmission behavior under various conditions.

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
•Transmission fluid pressure gauge
•Multimeter
•Funnel
•Safety gloves
•Safety glasses

Parts Required

•Honda ATF DW-1 transmission fluid
•Transmission Control Module (if replacement is necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Use an OBD-II scanner to retrieve and note any additional transmission-related trouble codes.
2
Inspect the transmission fluid level and condition; look for signs of contamination or burning.
3
Check for any visible leaks around the transmission and associated components.
4
Inspect the wiring and connectors to the transmission control module for damage or corrosion.
5
Perform a transmission fluid pressure test to ensure proper pressure levels.
6
Conduct a road test to observe transmission behavior under various conditions.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, transmission fluid pressure gauge, multimeter, funnel, safety gloves, and safety glasses.
Allow the vehicle to cool down before starting work.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

Check the transmission fluid level using the dipstick.
- If low, add the correct type of fluid (Honda ATF DW-1).
- If fluid is dirty or has a burnt smell, proceed to drain and replace.
Sub-steps:
1. Place a drain pan under the transmission and remove the drain plug.
2. Allow fluid to completely drain.
3. Replace the drain plug and torque it to manufacturer specifications (typically around 30 ft-lbs).
4. Refill the transmission with new fluid using a funnel until it reaches the proper level.

3. Inspect and Repair Wiring/Connectors

Tools Required: Multimeter.
Check the wiring harness and connectors for the TCM for any signs of wear or corrosion.
Sub-steps:
1. Disconnect the TCM connector.
2. Use a multimeter to check for continuity and proper voltage at the connector.
3. Repair or replace any damaged wiring or connectors.

4. Replace Transmission Control Module (if necessary)

If diagnostics indicate a faulty TCM, replacement may be required.
Sub-steps:
1. Disconnect the battery.
2. Locate the TCM, typically found near the transmission.
3. Remove the mounting bolts and disconnect the wiring harness.
4. Install the new TCM and reconnect the wiring harness.
5. Reinstall the bolts and torque them to specifications.

5. Reset the ECM

After repairs, reset the ECM to clear the P0700 code.
Sub-steps:
1. Reconnect the negative battery terminal.
2. Use the OBD-II scanner to clear the codes.
3. Start the vehicle to check if the check engine light remains off.