Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble reading the position of the gas pedal or throttle. It's like when you press a button and nothing happens because the wire is loose.
The P1220 code indicates that the throttle or pedal position sensor/switch 'A' circuit is reading a lower voltage than expected on Bank 2.
The throttle position sensor (TPS) or pedal position sensor provides data to the engine control module (ECM) about the position of the throttle or pedal. This code is triggered when the ECM detects a low voltage signal from the sensor on Bank 2, indicating a potential issue with the sensor or its circuitry.
• Check Engine Light is on
• Poor acceleration
• Engine stalling or hesitation
• Faulty throttle/pedal position sensor
• Damaged wiring or connectors
• ECM malfunction
Throttle Position Sensor (TPS): A sensor that monitors the position of the throttle in an internal combustion engine.
ECM: Engine Control Module, the computer that manages engine operation.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the throttle/pedal position sensor with a multimeter.
• Replace the throttle/pedal position sensor.
• 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 clean sensor connectors.
• Ensure proper maintenance of the throttle body.
• Avoid exposure to excessive moisture.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the car inspected by a professional if unsure.
• Avoid driving at high speeds until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with sensor failures due to wiring issues or sensor wear over time.
Moderate – It is advisable to address this issue soon to avoid potential drivability problems.
Driving with a malfunctioning throttle position sensor may lead to unsafe driving conditions. Address the issue promptly.
• Engine running
• Throttle pedal operation
The throttle position sensor is typically located on the throttle body, while the pedal position sensor is near the accelerator pedal.
Q: Can I drive with a P1220 code?
A: It's not recommended to drive for long periods with this code as it can affect drivability and engine performance.
Q: How do I reset the P1220 code?
A: After fixing the issue, you can reset the code using an OBD-II scanner.
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