P1120 GMC – Throttle Position Sensor 1 Circuit

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 – Throttle Position Sensor 1 Circuit

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 – Secondary Throttle Position Sensor

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 LAND-ROVER – Implausible signals from the accelerator pedal position sensor

P1120 LAND-ROVER Possible Causes

  • Faulty Accelerator Pedal Position (APP) Sensor
  • APP Sensor Wiring Harness Open or Shorted
  • Poor Electrical Connection in APP Sensor Circuit

How to Fix P1120 LAND-ROVER 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)
No Throttle Response

P1120 LAND-ROVER Meaning

The Accelerator Pedal Position (APP) sensor is located in a plastic housing integrated into the accelerator pedal. The housing is injection molded and provides a mounting location for the APP sensor. The sensor is externally mounted on the housing and secured with two Torx screws. The external body of the sensor has a six-pin connector that accepts a connector from the vehicle’s wiring harness.

The sensor has a protruding spindle that fits into the housing and provides the pivot point for the pedal mechanism. The spindle has a slot that allows a pin, which is attached to the sensor’s potentiometers, to rotate approximately 90°, corresponding to the pedal’s movement. The pedal is connected via a linkage to a drum, which engages with the sensor’s pin, converting the pedal’s linear motion into the drum’s rotational motion. The drum is connected to two steel cables. The cables are attached to two tension springs that are secured at the opposite end of the housing. The springs provide a “feel” to the pedal movement and require driver effort similar to a cable-operated throttle. A detent mechanism is located at the front end of the housing and is actuated by a ball located on the drum. At nearly maximum accelerator pedal movement, the ball contacts the detent mechanism. A spring in the mechanism is compressed and gives the driver the sensation of pressing a kickdown switch when full pedal travel is reached.

The APP sensor has two potentiometer tracks, each receiving a 5V input voltage from the ECM. Track 1 provides an output of 0.5V with the pedal at rest and 2.0V at 100% full throttle. Track 2 provides an output of 0.5V with the pedal at rest and 4.5V at 100% full throttle. The signals from both tracks are used by the ECM to determine fuel delivery for engine operation and also by the ECM and EAT ECU to initiate a kickdown request for the automatic transmission.

The ECM monitors the outputs from each of the potentiometer tracks and can determine the position, rate of change, and direction of the accelerator pedal movement. The “throttle closed” position signal is used by the ECM to initiate idle control and also to interrupt fuel cut-off.

P1120 LEXUS – Malfunction in the Accelerator Pedal Position Sensor Circuit

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 – Throttle Position Sensor Out of Range

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 – Throttle Position Sensor Out of Range

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 – Throttle Position Sensor Out of Range

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

P1120 MINI – Pedal Position Sensor Circuit

P1120 MINI Possible Causes

  • Faulty pedal position sensor
  • Pedal position sensor harness is open or shorted
  • Poor electrical connection in the pedal position sensor circuit

How to Fix P1120 MINI 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 engine light (or service engine soon warning light)

P1120 MINI Meaning

The pedal position sensor circuit is the generic description for the P1120 Mini code, but the manufacturer may have a different description for your specific vehicle model and year. Currently, we do not have more information about the P1120 Mini OBDII code.

P1120 NISSAN – Secondary Throttle Position Sensor

P1120 NISSAN 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 NISSAN 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 NISSAN Meaning

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