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P0222 Lexus Code - Throttle / Pedal Position Sensor / Switch 'B' Circuit Low Input

Quick Answer

The P0222 diagnostic trouble code (DTC) for Lexus vehicles indicates a problem with the Throttle / Pedal Position Sensor / Switch 'B' Circuit, specifically a low input signal. Common causes include Faulty throttle position sensor, Damaged or corroded wiring in the throttle position sensor circuit, Malfunctioning electronic control module (ECM). 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
P0222 Lexus indicates Throttle / Pedal Position Sensor / Switch 'B' Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor, Damaged or corroded wiring in the throttle position sensor circuit, Malfunctioning electronic control module (ECM).
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 Sep 12, 2024
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Code P0222 Lexus Description

The P0222 diagnostic trouble code (DTC) for Lexus vehicles indicates a problem with the Throttle / Pedal Position Sensor / Switch 'B' Circuit, specifically a low input signal. This sensor is crucial for the proper functioning of the electronic throttle control system, as it monitors the position of the throttle pedal and sends this information to the engine control module (ECM). The ECM uses this data to adjust the throttle opening and fuel delivery accordingly, ensuring optimal engine performance and fuel efficiency.

OBDII Code P0222 Lexus - Throttle / Pedal Position Sensor / Switch 'B' Circuit Low Input
P0222 Lexus Code - Throttle / Pedal Position Sensor / Switch 'B' Circuit Low Input

Common Causes of P0222 Lexus

  1. Faulty throttle position sensor.
  2. Damaged or corroded wiring in the throttle position sensor circuit.
  3. Malfunctioning electronic control module (ECM).
  4. Loose or poor connection at the throttle pedal position sensor.
  5. Environmental factors such as moisture or debris affecting sensor operation.

Symptoms of P0222 Lexus

  1. Hesitation or lack of response when pressing the accelerator pedal.
  2. Rough idling or unstable engine RPM.
  3. Engine stalling or difficulty starting.
  4. Reduced power output or acceleration.
  5. Illumination of the Check Engine Light on the dashboard.

How to Fix P0222 Lexus

  1. Begin by performing a thorough inspection of the throttle position sensor wiring and connections to check for any visible damage or corrosion. Repair or replace any damaged wiring as needed.
  2. Test the throttle position sensor using a multimeter to verify its functionality. If the sensor is faulty, replace it with a new one.
  3. Check the electronic control module (ECM) for any signs of damage or malfunction. If necessary, reprogram or replace the ECM to address the low input signal issue.
  4. Ensure that the throttle pedal position sensor is securely connected and functioning correctly. Adjust or replace the sensor if necessary.
  5. Clear the DTC codes from the ECM using a diagnostic scan tool and perform a test drive to confirm that the issue has been resolved.

Cost to Fix P0222 Lexus

The typical repair costs for addressing a Throttle / Pedal Position Sensor / Switch 'B' Circuit Low Input issue can vary depending on the specific cause of the problem and the labor rates at auto repair shops. In general, the cost of replacing a faulty throttle position sensor can range from $100 to $300, while repairing wiring or addressing ECM issues may cost between $200 and $500. Additional diagnostic fees and labor costs can increase the total repair bill.

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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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