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 is having trouble understanding the position of the gas pedal. It's like when your game controller doesn't work right, and the game can't tell if you're pressing the button or not.
The P1120 code is triggered when the Engine Control Module (ECM) detects a problem with the pedal position sensor circuit. This sensor tells the car how much you're pressing the gas pedal.
The pedal position sensor is a part of the throttle control system that communicates the position of the accelerator pedal to the ECM. If the ECM detects a voltage or signal issue within the sensor circuit, it will trigger the P1120 code.
• Check engine light on
• Reduced engine performance
• Inconsistent throttle response
• Faulty pedal position sensor
• Damaged wiring or connectors
• ECM issues
ECM: Engine Control Module, the computer that controls engine functions.
Throttle: The mechanism by which fluid flow is managed by constriction or obstruction.
• Use an OBD-II scanner to verify the code.
• Inspect the pedal position sensor and its wiring.
• Test the sensor with a multimeter for proper voltage.
• Replace the pedal 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
• Nissan Altima
• Regularly inspect and maintain throttle components.
• Ensure wiring and connectors are secure and undamaged.
• Keep the vehicle's software updated.
Sensor Issue
• Avoid driving at high speeds until the issue is resolved.
• Consult a professional mechanic if unsure about repairs.
Check with your vehicle manufacturer for warranty coverage on sensors and ECM components.
The P1120 code has been a common issue in vehicles with electronic throttle control systems, especially as they age.
Moderate – It should be addressed soon to avoid potential drivability issues.
Driving with a faulty pedal position sensor can lead to unpredictable vehicle behavior, which may be unsafe.
• Engine running
• Accelerator pedal pressed
The pedal position sensor is typically located near the accelerator pedal assembly.
Q: Can I drive with a P1120 code?
A: It's not recommended as it can lead to unpredictable throttle response.
Q: How do I reset the P1120 code?
A: After repairs, use an OBD-II scanner to clear the code.
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