Toyota Error Code P1700: How to Fix It

Error Code

P1700

Brand

Toyota

Product Type

automotive

Severity

Medium

DIY Difficulty

Medium

Estimated Fix Time

1-2 hours

Tools You'll Need

• OBD2 scanner
• Socket wrench set
• Multimeter
• Jack and jack stands
• Electrical contact cleaner
• Basic hand tools

How to Fix Error Code P1700

1. Connect OBD2 Scanner and Verify Code

   Ensure the vehicle is parked on level ground with parking brake engaged before beginning diagnostics.

2. Check Transmission Fluid Level and Condition

   Engine and transmission will be hot. Allow cooling time or wear protective gloves to prevent burns.

3. Locate the Output Speed Sensor

   Raise the vehicle safely using jack stands if sensor access requires getting underneath the car.

4. Inspect Wiring Harness and Connections

   Disconnect the battery negative terminal before working on electrical connections.

5. Test Sensor Circuit with Multimeter

6. Replace Output Speed Sensor if Faulty

   Use only the correct thread sealant type specified in service manual to prevent transmission fluid leaks.

7. Clear Codes and Test Drive

   If harsh shifting or other symptoms persist, stop driving and consult a professional transmission technician.

Parts You May Need