Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the gas pedal isn't working right because it got a signal that was too low.
The throttle position sensor (TPS) or pedal position sensor provides the engine control module (ECM) with information about the position of the throttle or pedal. A low circuit signal indicates a problem with this communication.
The P0122 code is triggered when the ECM detects that the throttle/pedal position sensor/switch 'A' circuit is sending a voltage signal lower than the expected range. This sensor is crucial for determining how much air enters the engine, which affects fuel delivery and engine power.
• Check Engine Light is on
• Poor acceleration
• Engine may stall or run rough
• Faulty throttle position sensor
• Wiring issues such as short circuits or poor connections
• Faulty ECM
Throttle Position Sensor (TPS): A sensor that measures the position of the throttle in an internal combustion engine.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the throttle position sensor and its wiring for damage.
• Check the voltage and ground signals at the sensor.
• Replace the throttle position sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Toyota Camry
• Ford F-150
• Honda Accord
• Regularly inspect and maintain the throttle body and sensors.
• Keep electrical connections clean and secure.
• Avoid harsh driving conditions that may damage sensors.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid driving the vehicle aggressively until repaired.
Sensor-related repairs may be covered under the vehicle's powertrain warranty.
P0122 is a common code that often appears in vehicles with high mileage or poor maintenance history.
Moderate – Should be addressed soon to prevent further issues.
Driving with a faulty throttle position sensor can lead to unsafe driving conditions and should be repaired promptly.
• Engine at operating temperature
• Vehicle at idle or under light load
The throttle position sensor is typically located on the throttle body or integrated into the accelerator pedal assembly.
Q: Can I drive with a P0122 code?
A: It's not recommended to drive for extended periods with this code as it can affect vehicle performance and safety.
Q: How do I clear a P0122 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the code will return.
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