P1120 CHEVROLET Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in throttle position sensor circuit
• Improperly adjusted throttle position sensor

How to Fix P1120 CHEVROLET Code?

Start by checking the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

When the Powertrain Control Module (PCM) detects a signal voltage outside the normal operating range of the sensor, P1120 is set.

Symptoms

Possible symptoms

Illuminated engine light (or service engine soon warning light)

P1120 CHEVROLET Meaning

The Throttle Position (TP) sensor is a potentiometer. The TP sensor provides a voltage signal that changes relative to throttle blade angle. This signal voltage is one of the most important inputs used by the Powertrain Control Module (PCM). The TP sensor has a 5.0 volt reference circuit, ground circuit, and signal circuit.
TP sensor signal voltage should be approximately 0.6 volt at idle. TP sensor voltage should increase to over 4.0 volts at wide open throttle (WOT).

The P1120 code for a Ford vehicle is related to a problem with the throttle position sensor (TPS), which is responsible for detecting the position of the accelerator pedal. This sensor allows the ECM (engine control module) to regulate air intake and the air-fuel mixture based on the throttle position.

Meaning of the P1120 Code

The throttle position sensor (TPS) sends a signal to the engine control module (ECM) that is proportional to the throttle valve opening angle. This signal allows the ECM to determine various engine conditions, such as:

• Closed throttle: Idle or deceleration.

• Partial throttle: Cruise or moderate acceleration.

• Wide open throttle: Maximum acceleration.

The P1120 code is generated when the sensor voltage sent to the ECM falls outside the expected value ranges for the system. This can be due to a malfunction of the sensor itself or a problem in the sensor circuit.

Possible Causes of the P1120 Code

1. Faulty throttle position sensor: If the sensor is damaged or not functioning correctly, it may send incorrect signals to the ECM.

2. Open or shorted throttle position sensor harness: Faulty wiring or a broken connection can prevent the sensor from properly transmitting information to the ECM.

3. Poor electrical connection in the throttle position sensor circuit: Corroded, bent, or broken connector pins can cause a loss of signal.

4. Misadjusted throttle position sensor: A misaligned or improperly adjusted sensor can lead to incorrect signal readings, disrupting engine operation.

Possible Symptoms of the P1120 Code

• Engine light on (Check Engine Light or Service Engine Soon).

• No throttle response: The engine may not respond correctly to accelerator pedal commands, resulting in a loss of power.

• Sluggishness or reduced performance: A slow or imprecise throttle response can affect vehicle driving.

How to Fix the P1120 Code

1. Check the throttle position sensor (TPS):

   • Inspect the sensor for signs of failure (e.g., cracks or visible damage).

   • If the sensor is faulty, it will need to be replaced.

2. Inspect the wiring harness and connectors:

   • Visually check the wiring and connectors associated with the throttle position sensor for signs of damage (cut wires, corrosion, loose connectors).

   • If cables are damaged or corroded, repair or replace them.

3. Check the electrical connection:

   • Ensure the sensor connector pins are clean, not corroded, and properly connected.

   • Clean the connectors if necessary and reinsert them correctly.

4. Check the throttle position sensor alignment:

   • Ensure the sensor is properly aligned and correctly installed on the throttle shaft. If the sensor is misadjusted, adjust it or replace it if necessary.

5. Clear the code and test:

   • Once repairs have been made, clear the code using an OBDII scanner and perform a road test to check if the problem persists.

Conclusion

The P1120 code indicates a problem with the throttle position sensor (TPS) or its circuit. To resolve this issue, it is essential to check the condition of the sensor, wiring, and electrical connectors. If the sensor is faulty, it will need to be replaced. If the wiring is damaged, repairs will be necessary to restore proper system operation.

P1120 GMC Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in throttle position sensor circuit
• Improperly adjusted throttle position sensor

How to Fix P1120 GMC Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

When the Powertrain Control Module (PCM) detects a signal voltage higher than the normal operating range of the sensor, P1120 sets.

Possible Symptoms

Illuminated MIL (Malfunction Indicator Light)

P1120 GMC Meaning

The Throttle Position (TP) sensor is a potentiometer. The TP sensor provides a voltage signal that changes relative to throttle blade angle. This signal voltage is one of the most important inputs used by the Powertrain Control Module (PCM). The TP sensor has a 5.0 volt reference, ground, and signal circuit.
TP sensor signal voltage should be approximately 0.6 volt at idle. TP sensor voltage should increase to over 4.0 volts at wide open throttle (WOT).

P1120 HYUNDAI Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in throttle position sensor circuit
• Improperly adjusted throttle position sensor

How to Fix P1120 HYUNDAI Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

A malfunction is detected when the sensor voltage sent to the Engine Control Module (ECM) is out of range.

Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P1120 HYUNDAI Meaning

The throttle position sensor (TPS) responds to accelerator pedal movement. This sensor is a type of potentiometer that converts throttle position into output voltage and sends the voltage signal to the Engine Control Module (ECM). Additionally, the sensor detects the opening and closing speed of the throttle valve and transmits the voltage signal to the ECM.

P1120 INFINITI Possible Causes

• Faulty secondary throttle position sensor
• Secondary throttle position sensor harness is open or shorted
• Poor electrical connection in secondary throttle position sensor circuit

How to Fix P1120 INFINITI Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Check engine light on (or service engine soon warning light)

P1120 INFINITI Meaning

The secondary throttle position sensor is the generic description for P1120 Infiniti code, but the manufacturer may have a different description for your specific vehicle model and year. Currently, we don’t have more information about the OBDII P1120 Infiniti code.

P1120 LEXUS Possible Causes

• Faulty accelerator pedal position sensor
• Accelerator pedal position sensor harness is open or shorted
• Poor electrical connection in accelerator pedal position sensor circuit

How to Fix P1120 LEXUS Code?

Start by checking the “Possible Causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P1120 LEXUS Meaning

The accelerator pedal position sensor is mounted on the throttle body and has 2 sensors to detect throttle position and throttle position malfunction.
The accelerator pedal position sensor is connected to the accelerator pedal by the accelerator cable and the voltage applied across the VPA and VPA2 terminals of the engine control module (ECM) changes between 0 V and 5 V proportionally to the accelerator pedal opening angle.

The ECM calculates the current accelerator pedal opening angle from the input of these signals from the VPA and VPA2 terminals and the ECM controls the throttle motor based on these signals.

If code P1120 is stored, the ECM cuts power to the throttle motor and magnetic clutch, and the throttle valve is completely closed by the return spring.

However, the throttle opening angle can be controlled by the accelerator pedal via the accelerator cable

P1120 LINCOLN Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in throttle position sensor circuit
• Improperly adjusted throttle position sensor

How to Fix P1120 LINCOLN Code?

Begin by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

A malfunction is detected when the sensor voltage sent to the Engine Control Module (ECM) is out of range.

Possible Symptoms

Engine light on (or service engine soon warning light)
No throttle response

P1120 LINCOLN Meaning

The Throttle Position Sensor (TPS) responds to throttle pedal movement. The TPS is a rotary potentiometer sensor that provides a signal to the Powertrain Control Module (PCM) that is linearly proportional to throttle plate/shaft position. As the TPS is rotated by the throttle shaft, the following operating conditions are determined by the PCM:
• Closed throttle (includes idle or deceleration)
• Part throttle (includes cruise or moderate acceleration)
• Wide open throttle (includes maximum acceleration or crank flare)
• Throttle angle rate

P1120 MAZDA Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in throttle position sensor circuit
• Improperly adjusted throttle position sensor

How to Fix P1120 MAZDA Code?

Start by checking the “Possible Causes” listed above. Visually inspect the corresponding wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

A malfunction is detected when the sensor voltage sent to the Engine Control Module (ECM) is out of range.

Possible Symptoms

Illuminated check engine light (or service engine soon warning light)

P1120 MAZDA Meaning

The Throttle Position Sensor (TPS) responds to throttle pedal movement. This sensor is a type of potentiometer that transforms throttle position into output voltage and transmits the voltage signal to the Engine Control Module (ECM). Additionally, the sensor detects the opening and closing speed of the throttle valve and transmits the voltage signal to the ECM.

P1120 MERCURY Possible Causes

• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in throttle position sensor circuit
• Improperly adjusted throttle position sensor

How to Fix P1120 MERCURY Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding cable harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

A malfunction is detected when the sensor voltage sent to the Engine Control Module (ECM) is out of range.

Possible Symptoms

Engine light on (or engine service warning light soon)
No throttle response

P1120 MERCURY Meaning

The Throttle Position Sensor (TPS) responds to accelerator pedal movement. The TPS is a rotary potentiometer sensor that provides a signal to the Powertrain Control Module (PCM) that is linearly proportional to throttle plate/shaft position. As the TPS is rotated by the throttle shaft, the following operating conditions are determined by the PCM:
• Closed throttle (includes idle or deceleration)
• Part throttle (includes cruise or moderate acceleration)
• Wide open throttle (includes maximum acceleration or crank flare)
• Throttle angle rate