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How to fix P0700?

Published on April 10th, 2022

The p0700 error code indicates that there is a problem with the transmission control system. This system controls the shifting of gears in an automatic transmission, and the p0700 code indicates that there is a problem with the way the system is functioning. There are a number of reasons why this code may occur, including a faulty transmission control module, a problem with the transmission itself, or a problem with the vehicle's electrical system.

Other common searches for this error include:

  • error code p0700
  • p0700

1. Check the transmission fluid level and condition

  1. Locate the transmission fluid level and observe the level or condition.
  2. If the transmission fluid level is low, add transmission fluid to the appropriate level.
  3. If the transmission fluid level is high, add transmission fluid to the appropriate level.
  4. Reinstall the transmission fluid cooler if necessary.
  5. Reinstall the transmission fluid filter.
  6. If the transmission fluid level is still high, replace the transmission fluid cooler.
  7. If the transmission fluid level is still high, replace the transmission fluid filter and transmission fluid.

2. Inspect the transmission for leaks

  1. Remove the transmission pan.
  2. Check the fluid level and note any leaks.
  3. Check the fluid pressure and note any leaks.
  4. Check the fluid temperature and note any leaks.
  5. Inspect the transmission for wear or damage.

3. Check for loose or damaged electrical connectors at the transmission

Step 1: remove the transmission cover

  1. Remove the transmission cover. Refer to Transmission Removal and Installation.

  2. Disconnect the battery cable. Refer to Battery Cable Disconnections.

  3. Remove the five screws that secure the transmission case to the engine.

  4. Remove the transmission case. Refer to Transmission Removal and Installation.

  5. Inspect the electrical connectors for loose or damaged wiring. Replace any damaged connectors. Step 2: clean and lubricate the transmission

  6. Clean and lubricate the transmission. Refer to Transmission Cleaning and Lubrication.

  7. Reinstall the transmission case. Refer to Transmission Reinstallation.

  8. Reconnect the battery cable. Refer to Battery Cable Reconnections.

4. Check the transmission control module for loose or damaged connectors

  1. Inspect the connectors for damage.
  2. Remove any damaged or loose connectors.
  3. Reinstall the connectors in the correct positions.
  4. Check the operation of the vehicle.

5. Inspect the transmission for mechanical damage

  1. Inspect the engine for obvious damage. If the engine appears to be in good condition, inspect the transmission for mechanical damage.
  2. Check the fluid levels, if present.
  3. If the transmission appears to be in good condition, check the fluid levels, if present.
  4. Check the torque converter for damage.
  5. If the transmission appears to be in good condition, replace the torque converter if necessary.

6. Replace the transmission control module

  1. Remove the instrument panel.
  2. Remove the passenger side front wheelwell.
  3. Remove the transmission cover.
  4. Remove the transmission.
  5. Remove the two bolts that secure the transmission control module (TCM) to the transmission.
  6. Remove the TCM.
  7. Install a new TCM.
  8. reassemble the transmission.
  9. Replace the instrument panel.

Some users might also have success with the following opitons:

  1. Replace the transmission.