how to fix P0700 transmission trouble code on Honda CR-V Fifth Generation (2017-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts during repair.

2. Inspect and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, funnel, socket set, torque wrench.
• Remove the transmission fluid drain plug and drain fluid into a pan.
• Replace the drain plug and torque to manufacturer specifications (typically around 30 lb-ft).
• Use a funnel to refill with the appropriate Honda ATF fluid (usually Honda ATF DW-1).
• Check fluid level using the dipstick and ensure it is within the recommended range.

3. Inspect and Repair Wiring/Connectors

• Tools Required: Multimeter, wire brush, electrical cleaner.
• Visually inspect wiring harnesses and connectors related to the TCM.
• Use a multimeter to check for continuity and proper voltage at each connector.
• Clean any corrosion from connectors with electrical cleaner and a wire brush.
• Repair or replace damaged wiring and connectors as necessary.

4. Reprogram or Replace TCM (if necessary)

• Tools Required: OBD-II scanner capable of TCM reprogramming.
• If diagnostics indicate a faulty TCM, consult the manufacturer for reprogramming or replacement procedures.
• If replacing, remove the TCM following the manufacturer’s guidelines and install the new unit.
• Reconnect all wiring and connectors securely.

5. Final Steps

• Reconnect the negative battery terminal.
• Clear the P0700 code using the OBD-II scanner.
• Conduct a road test to ensure that the transmission operates smoothly and the check engine light does not reappear.