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Engine-Codes – Toyota – P1120 Toyota

P1120 Toyota Code - Accelerator Pedal Position Sensor Circuit Malfunction

Quick Answer

The P1120 Toyota code indicates a malfunction in the accelerator pedal position sensor circuit. Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the sensor circuit, ECM software or hardware problems. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1120 Toyota indicates Accelerator Pedal Position Sensor Circuit Malfunction.
Common causes
Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the sensor circuit, ECM software or hardware problems.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code P1120 Toyota Description

The P1120 Toyota code indicates a malfunction in the accelerator pedal position sensor circuit. This sensor is responsible for detecting the position of the accelerator pedal and sending this information to the engine control module (ECM) to adjust the fuel injection and ignition timing. When this circuit malfunctions, it can lead to issues with engine performance, fuel efficiency, and overall drivability of the vehicle.

OBDII Code P1120 Toyota - Accelerator Pedal Position Sensor Circuit Malfunction
P1120 Toyota Code - Accelerator Pedal Position Sensor Circuit Malfunction

Common Causes of P1120 Toyota

  1. Faulty accelerator pedal position sensor
  2. Wiring or connector issues in the sensor circuit
  3. ECM software or hardware problems
  4. Corrosion or water damage in the sensor connections
  5. Mechanical issues with the accelerator pedal itself

Symptoms of P1120 Toyota

  1. Loss of power or hesitation when accelerating
  2. Engine stalling or surging
  3. Difficulty maintaining a consistent speed
  4. Check Engine Light illuminated
  5. Reduced fuel efficiency

How to Fix P1120 Toyota

  1. Diagnose the issue by using a scan tool to retrieve the trouble code and inspecting the sensor circuit for any visible damage
  2. Test the accelerator pedal position sensor using a multimeter to check for proper voltage and resistance
  3. Inspect the wiring and connectors for any signs of damage or corrosion, repairing or replacing as necessary
  4. Clear the trouble code from the ECM and perform a test drive to ensure the issue has been resolved
  5. If the problem persists, consider replacing the accelerator pedal position sensor or seeking professional help for further diagnosis

Cost to Fix P1120 Toyota

The cost of repairing a P1120 Toyota code can vary depending on the specific cause of the issue. On average, the parts for this repair, such as a new accelerator pedal position sensor, can range from $50 to $200. Labor costs at an auto repair shop typically range from $80 to $150 per hour, with the total repair time likely to be around 1-2 hours. Therefore, the total cost of repairing this issue could be anywhere from $130 to $500, including parts and labor. It's important to note that these estimates are approximate and can vary based on the location, vehicle make and model, and other factors.

What does this mean?

Tech Notes for P1120 Toyota

For Hybrid Toyota Vehicles P1120 = Coolant Flow Control Valve Position Sensor Circuit. See: P1120 Toyota

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Information for Specific Toyota Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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