P0122 - Throttle Position Sensor/Switch 'A' Circuit Low Input

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
Comments  |  Add Comment

Possible causes

  • Faulty throttle position sensor.
  • Throttle position sensor harness is open or shorted
  • Throttle position sensor circuit poor electrical connection

When is the code detected?

An excessively low voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM).

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0122 Description

The throttle position sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.

Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

OBDII Code P0122 - Throttle Position Sensor/Switch 'A' Circuit Low Input - AutoCodes.com

P0122 Information for specific makes

  • P0122 ACURA Throttle Position Sensor 'A' Circuit Low Voltage
  • P0122 AUDI Throttle Pedal Position Sensor/Switch 'A' Circuit Low
  • P0122 BMW Throttle Position Sensor/Switch 'A' Circuit Low Input
  • P0122 BUICK Throttle Position Sensor 1 Circuit Low Voltage
  • P0122 CADILLAC Throttle Position Sensor 1 Circuit Low Voltage
  • P0122 CHEVROLET Throttle Position Sensor 1 Circuit Low Voltage
  • P0122 CHRYSLER Throttle Position Sensor/Accelerator Position Pedal Circuit Low Input
  • P0122 DODGE Throttle Position Sensor/Accelerator Position Pedal Circuit Low Input   
  • P0122 FORD Throttle/Pedal Position Sensor 'A' Circuit Low Input
  • P0122 GMC Throttle Position Sensor 1 Circuit Low Voltage
  • P0122 HONDA Throttle Position Sensor 'A' Circuit Low Voltage
  • P0122 HYUNDAI Throttle/Pedal Position Sensor 'A' Circuit Low Input
  • P0122 INFINITI Throttle Position Sensor/Switch '1' Circuit Low Input
  • P0122 ISUZU Throttle Position Sensor 1 Circuit Low Voltage
  • P0122 JAGUAR Throttle Position Sensor/Switch 'A' Circuit Low Input
  • P0122 JEEP Throttle Position Sensor/Accelerator Position Pedal Circuit Low Input
  • P0122 KIA Throttle/Pedal Position Sensor 'A' Circuit Low Input
  • P0122 LEXUS Throttle Position Sensor/Switch 'A' Circuit Low Input
  • P0122 MAZDA Throttle Position Sensor 1 Circuit Low Input
  • P0122 MERCEDES-BENZ Throttle/Petal Position Sensor/Switch A Circuit Low Input
  • P0122 MINI Throttle Position Sensor/Switch 'A' Circuit Low Input
  • P0122 MITSUBISHI Throttle Position Sensor Circuit Low Input
  • P0122 NISSAN Throttle Position Sensor/Switch '1' Circuit Low Input
  • P0122 OLDSMOBILE Throttle Position Sensor/Switch 'A' Circuit Low Input
  • P0122 PONTIAC Throttle Position Sensor 1 Circuit Low Voltage
  • P0122 SATURN Throttle Position Sensor 1 Circuit Low Voltage
  • P0122 SCION Throttle Position Sensor/Switch 'A' Circuit Low Input
  • P0122 SUBARU Throttle Position Sensor/Switch 'A' Circuit Low Input
  • P0122 TOYOTA Throttle Position Sensor/Switch 'A' Circuit Low Input
  • P0122 VOLKSWAGEN Throttle Pedal Position Sensor/Switch 'A' Circuit Low

Need more help?

Get the P0122 code diagnosed by a professional: Find a repair shop in your area

Related Information

P0122 Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0122 code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧