AutoCodes – Mazda – P1120 Mazda

P1120 Mazda Code - Throttle Position Sensor Out Of Range

Quick Answer

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection. 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 Mazda indicates Throttle Position Sensor Out Of Range.
Common causes: Common causes include Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection.
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.

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Code Popularity 10,006

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1120 Mazda 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.

OBDII Code P1120 Mazda - Throttle Position Sensor Out Of Range - AutoCodes.com — P1120 Mazda Code - Throttle Position Sensor Out Of Range

What does this mean?

What are the Possible Causes of the DTC P1120 Mazda?

Faulty throttle position sensor
Throttle position sensor harness is open or shorted
Throttle position sensor circuit poor electrical connection
Throttle position sensor not properly adjusted

How to Fix the DTC P1120 Mazda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1120 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1120 Mazda code?

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Need Help with the Code?

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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 Mazda Code

1. What does the OBDII code P1120 mean on a Mazda?

P1120 indicates that the Throttle Position Sensor (TPS) is detecting values that are out of the expected range, which may signal a malfunction in the sensor or its circuit.

2. What are the common symptoms of a P1120 code on a Mazda?

Symptoms may include poor acceleration, hesitation, reduced engine performance, erratic idling, or the Check Engine Light turning on.

3. What causes the P1120 code to appear in a Mazda?

The most common causes are a faulty Throttle Position Sensor, damaged wiring or connectors, or issues with the throttle body assembly.

4. Can a dirty throttle body cause a P1120 code?

Yes, a dirty or stuck throttle body can cause the TPS to send incorrect signals, resulting in the P1120 code.

5. How do I diagnose the P1120 code on my Mazda?

Start by inspecting the TPS and its wiring for damage, test the sensor's voltage output with a multimeter, and ensure the throttle body is clean and functioning properly.

6. Can I drive my Mazda with a P1120 code?

Driving with a P1120 code is not recommended as it can cause poor engine performance and potentially damage other components over time.

7. How do I fix the P1120 code on my Mazda?

Repairs may include cleaning the throttle body, replacing the Throttle Position Sensor, repairing damaged wiring, or recalibrating the TPS.

8. Does the P1120 code require reprogramming the ECU?

In most cases, ECU reprogramming is not required, but the TPS may need to be recalibrated after replacement.

9. What tools do I need to fix a P1120 code?

Youâ€™ll typically need a multimeter, OBDII scanner, and basic tools for removing and inspecting the TPS or throttle body.

10. How much does it cost to repair a P1120 code on a Mazda?

The cost varies depending on the issue. Replacing the TPS typically costs $100-$300, while cleaning the throttle body or repairing wiring may be less expensive.