why does my Honda CR-V have a check engine light and a P0700 code?

Solution

1. Preparation

• Gather tools including an OBD-II scanner, multimeter, socket set, and basic hand tools.
• Ensure the vehicle is on a flat surface and the engine is cool before starting work.

2. Transmission Fluid Inspection

• Tools Required: Transmission fluid dipstick, funnel for adding fluid.
• Remove the transmission dipstick and check the fluid level. If low, add the recommended transmission fluid type according to the owner's manual.
• Inspect the fluid's color and smell; if it appears dark or burnt, a fluid change may be necessary.

3. Wiring and Connector Inspection

• Disconnect the battery to avoid electrical shorts.
• Inspect the wiring harness and connectors related to the transmission. Look for frayed wires, loose connections, or corrosion. Repair or replace any damaged components.

4. TCM Testing

• Reconnect the battery and use a multimeter to check the voltage at the TCM connectors while the ignition is in the "on" position.
• If voltage readings are incorrect, trace back to the source of the electrical issue.

5. Clear Codes and Test Drive

• Use the OBD-II scanner to clear the P0700 code.
• Take the vehicle for a test drive to monitor transmission behavior and determine if the check engine light reappears.