P1120 Code - Throttle Position Sensor Out Of Range

Quick Answer

The P1120 diagnostic trouble code indicates that the throttle position sensor (TPS) is out of range, meaning that the sensor is providing incorrect or erratic readings to the engine control module (ECM). Common causes include Faulty throttle position sensor, Wiring or connector issues in the TPS circuit, Carbon buildup on the throttle body. 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

P1120 indicates Throttle Position Sensor Out Of Range.

Common causes

Common causes include Faulty throttle position sensor, Wiring or connector issues in the TPS circuit, Carbon buildup on the throttle body.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
• Comments
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Common Causes of P1120

Symptoms of P1120

How to Fix P1120

Cost to Fix P1120

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Code P1120 Information for Specific Makes

• P1120 Audi — HO2S Sensor Heater Circuit Open Bank 2 Sensor 1
• P1120 BMW — Pedal Position Sensor Circuit
• P1120 Buick — Throttle Position Sensor 1 Circuit
• P1120 Cadillac — Throttle Position Sensor 1 Circuit
• P1120 Chevrolet — Throttle Position Sensor 1 Circuit
• P1120 Ford — Throttle Position Sensor Out of Range
• P1120 GMC — Throttle Position Sensor 1 Circuit
• P1120 Hyundai — Throttle Position Sensor 1 Circuit
• P1120 Infiniti — Secondary Throttle Position Sensor
• P1120 Land Rover — Accelerator Pedal Position Sensor Implausible Signals
• P1120 Lexus — Accelerator Pedal Position Sensor Circuit Malfunction
• P1120 Lexus — Coolant Flow Control Valve Position Sensor Circuit
• P1120 Lincoln — Throttle Position Sensor Out of Range
• P1120 Mazda — Throttle Position Sensor Out Of Range
• P1120 Mercury — Throttle Position Sensor Out of Range
• P1120 MINI — Pedal Position Sensor Circuit
• P1120 Nissan — Secondary Throttle Position Sensor
• P1120 Pontiac — Throttle Position Sensor 1 Circuit
• P1120 Saturn — Throttle Position Sensor 1 Circuit
• P1120 Subaru — Throttle Position Sensor Out Of Range
• P1120 Toyota — Coolant Flow Control Valve Position Sensor Circuit
• P1120 Toyota — Accelerator Pedal Position Sensor Circuit Malfunction
• P1120 Volkswagen — HO2S Sensor Heater Circuit Open Bank 2 Sensor 1

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.

Frequently Asked Questions about P1120 Code

1. What are the common symptoms of OBDII code P1120 (Throttle Position Sensor Out Of Range)?

- Common symptoms include rough idle, stalling, poor acceleration, and the Check Engine light coming on.

2. What are the possible causes of OBDII code P1120?

- The code may be triggered by a faulty throttle position sensor, wiring issues, a dirty throttle body, or a problem with the vehicle's electronic control module.

3. How can I diagnose the cause of OBDII code P1120?

- Diagnosing the issue typically involves checking the throttle position sensor's voltage output, inspecting the wiring for any damage, and ensuring the throttle body is clean and functioning correctly.

4. Can I still drive my vehicle with OBDII code P1120?

- It is not recommended to drive your vehicle with this code as it can lead to poor performance and potential safety issues. It's best to address the problem promptly.

5. How can I repair OBDII code P1120?

- Repair options may include replacing the throttle position sensor, repairing any damaged wiring, cleaning the throttle body, or resetting the electronic control module.

6. Is it possible to reset OBDII code P1120 without repairs?

- While clearing the code may temporarily turn off the Check Engine light, it's important to address the underlying issue to prevent further problems and potential damage to your vehicle.

7. Will OBDII code P1120 cause damage to my vehicle if left untreated?

- Ignoring this code can lead to poor engine performance, decreased fuel efficiency, and potential damage to other engine components over time.

8. How much does it typically cost to repair OBDII code P1120?

- The cost of repairs can vary depending on the cause of the issue and the specific vehicle. It's best to consult a mechanic for an accurate diagnosis and repair estimate.

9. Can I prevent OBDII code P1120 from occurring in the future?

- Regular maintenance, such as keeping the throttle body clean and checking the sensor's connections, can help prevent this code from reoccurring.

10. Should I attempt to repair OBDII code P1120 myself, or seek professional help?

- While some simple repairs like cleaning the throttle body can be done by DIY enthusiasts, diagnosing and fixing complex issues with the throttle position sensor or wiring may require professional assistance from a mechanic.