Lexus Acura Error Code P1120: How to Fix It

Q: Can I drive with P1120 error code?

You should avoid driving with P1120 as it affects throttle control and may cause unpredictable acceleration or put the vehicle in limp mode. If you must drive, do so carefully and get it diagnosed immediately.

Q: How much does it cost to fix P1120?

If it's just cleaning connections, the cost is minimal. A pedal position sensor replacement typically costs $200-$400 including labor. Throttle body cleaning ranges from $150-$300 at a shop.

Q: What causes P1120 error code?

Common causes include a faulty pedal position sensor, corroded wiring connections, damaged accelerator pedal assembly, throttle body issues, or problems with the engine control module.

Q: Will P1120 cause my car to fail emissions?

Yes, P1120 will likely cause your vehicle to fail emissions testing since it's an active diagnostic trouble code that affects engine performance and emissions control systems.

Abstract

Error code P1120 indicates a problem with your Lexus or Acura's pedal position sensor circuit, which monitors accelerator pedal movement. This critical sensor tells the engine control module how much throttle input you're requesting, and when it malfunctions, you may experience reduced power, rough idling, or the vehicle going into limp mode.