what does it mean if my Honda Civic 9th Generation (2012-2015) shows error code P0700?

Solution

1. Preparation

• Gather tools and materials: OBD-II scanner, multimeter, socket set, torque wrench, new transmission fluid, and possibly a replacement TCM or sensors.
• Park the vehicle on a level surface and engage the parking brake.

2. Check Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick and remove it.
  2. Wipe it clean and reinsert it to check the fluid level.
  3. If low, add the correct transmission fluid as specified in the owner’s manual.
  4. If the fluid appears burnt or contaminated, proceed to a fluid change.

3. Inspect Wiring and Connectors

• Sub-steps:
  1. Visually inspect the wiring harness leading to the TCM for frays, breaks, or corrosion.
  2. Disconnect the TCM connector and clean any corrosion with electrical contact cleaner.
  3. Reconnect and ensure a secure fit.

4. Test TCM

• Sub-steps:
  1. Disconnect the battery to ensure safety before working on electrical components.
  2. Remove the TCM from its mounting location using a socket set.
  3. Use a multimeter to check for proper voltage and ground at the TCM connectors.
  4. If faulty, replace with a new or refurbished TCM.

5. Replace Faulty Sensors

• Sub-steps:
  1. If any sensors (speed, range) are identified as faulty, locate them per the service manual.
  2. Disconnect the wiring harness and remove the faulty sensor.
  3. Install the new sensor and reconnect the wiring harness securely.

6. Refill Transmission Fluid (if drained)

• Sub-steps:
  1. If you changed the fluid, refill using the manufacturer-recommended transmission fluid type.
  2. Start the engine and let it run for a few minutes, then check the fluid level again, adding as necessary.