Nissan P1720 Error Code: How to Fix It

Q: Can I drive with Nissan error code P1720?

You can drive short distances with P1720, but avoid highway driving. The error can cause harsh shifting, incorrect speedometer readings, and reduced fuel economy. Get it diagnosed promptly to prevent transmission damage.

Q: How much does it cost to fix P1720 on a Nissan?

Fixing P1720 typically costs $150-400 if it's just the speed sensor replacement. If internal transmission components are damaged, costs can range from $800-2500. Professional diagnosis usually costs $100-150.

Q: What causes Nissan P1720 error code?

P1720 is commonly caused by a faulty vehicle speed sensor, damaged wiring, low transmission fluid, or internal transmission problems. Corrosion at electrical connections and worn sensor gears can also trigger this code.

Q: Will P1720 cause my Nissan to fail emissions testing?

Yes, any active check engine light including P1720 will typically cause your vehicle to fail emissions testing. You must repair the issue and ensure the code doesn't return before testing.

Abstract

The Nissan P1720 error code indicates a problem with your vehicle's speed sensor output signal. This sensor tells the engine control module (ECM) how fast your vehicle is traveling, and when it malfunctions, you may experience transmission shifting issues, speedometer problems, or reduced fuel economy.