How to Fix P1121 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.

Possible Symptoms

Check Engine Light On (or Service Engine Soon Warning Light)

P1121 HYUNDAI Meaning

Throttle Position Input – Abnormal is the generic description for Hyundai code P1121, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have further information on Hyundai OBDII code P1121.

P1121 INFINITI Possible Causes

• Faulty electronic throttle control actuator
• Electronic throttle control actuator harness is open or shorted
• Poor electrical connection in electronic throttle control actuator circuit

How to Fix P1121 INFINITI 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?

The electronic throttle control actuator is not functioning properly due to a malfunction of the return spring or the throttle valve is stuck open

Possible Symptoms

Engine light on (or service engine soon warning light)
No response from accelerator pedal

P1121 INFINITI Meaning

The electronic throttle control actuator consists of a throttle control motor, throttle position sensor (TPS), etc. The throttle control motor is operated by the engine control module (ECM) and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position and the opening/closing speed of the throttle valve and transmits voltage signals to the ECM. The ECM evaluates the current throttle opening angle from these signals and the ECM controls the throttle control motor to properly adjust the throttle opening angle according to driving conditions.

P1121 ISUZU Possible Causes

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

How to Fix P1121 ISUZU 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.

Possible Symptoms

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

P1121 ISUZU Meaning

Throttle position sensor circuit lower than expected is the generic description for P1121 Isuzu 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 P1121 Isuzu OBDII code.

P1121 KIA Possible Causes

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

How to Fix P1121 KIA 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?

If the difference between the actual value and the calculated value exceeds the threshold value, the ECM judges it as a fault and the DTC is set.

Symptoms

Possible symptoms

Illuminated engine light (or service engine soon warning light)

P1121 KIA Meaning

The throttle position (TP) sensor measures the throttle valve opening angle and is mounted on the side of the throttle body and connected to the throttle blade shaft. The resistance of the TP sensor changes according to the throttle blade shaft position. The TP sensor has a potentiometer whose resistance changes with the throttle position. The engine control module (ECM) provides a 5-volt reference voltage to the TP sensor. The ECM reads the voltage across the TP sensor and converts it to throttle position. During acceleration, the TP sensor resistance decreases. During deceleration, the TP sensor resistance increases. The ECM uses the TP sensor signal to adjust injector timing and pulse width. The TP sensor signal along with the MAF sensor signal are used by the ECM to calculate engine load. Throttle angle information is sent to the ECM for detecting engine conditions such as idle, partial load, full load condition, and anti-shock condition and for correcting fuel enrichment during acceleration.

P1121 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 P1121 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 Response from Accelerator

P1121 LAND-ROVER Meaning

The Accelerator Pedal Position (APP) sensor is located in a plastic housing integrated with 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 stud that protrudes into the housing and provides the pivot point for the pedal mechanism. The stud 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 supply 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.

P1121 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 P1121 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 engine light (or service engine soon warning light)

P1121 LEXUS Meaning

The accelerator pedal position sensor is mounted on the throttle body and features 2 sensors to detect throttle position and throttle position malfunction.

The accelerator pedal position sensor is connected to the accelerator pedal via the throttle 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 valve opening angle can be controlled by the accelerator pedal via the throttle cable.

P1121 LEXUS Possible Causes

• Faulty coolant flow control valve position sensor
• Coolant flow control valve position sensor harness is open or shorted
• Poor electrical connection in coolant flow control valve position sensor circuit

How to Fix P1121 LEXUS 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.

What Does It Mean?

For non-hybrid Lexus vehicles P1121 = throttle pedal position sensor range/performance problem.

Symptoms

Possible symptoms

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

P1121 LEXUS Meaning

Coolant flow control valve position sensor circuit stuck is the generic description for Lexus P1121 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have more information about the P1121 Lexus OBDII code.

P1121 LINCOLN Possible Causes

• Air leak between the mass air flow sensor and the throttle body
• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in the throttle position sensor circuit
• Damaged mass air flow sensor

How to Fix P1121 LINCOLN 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?

The sensor signal output is not consistent with the engine load measurement

Possible Symptoms

Engine light on (or service engine soon warning light)

P1121 LINCOLN Meaning

The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing the detected throttle position to mass air flow readings. If during engine running self-test, the comparison of TP sensor and MAF sensor readings is not consistent with calibrated load values, the test fails and a diagnostic code is stored in keep alive memory.

P1121 MAZDA Possible Causes

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

How to Fix P1121 MAZDA 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.

Possible Symptoms

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

P1121 MAZDA Meaning

Throttle position sensor incompatible with mass air flow sensor is the generic description for Mazda P1121 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have additional information about Mazda P1121 OBDII code.

P1121 MERCURY Possible Causes

• Air leak between the mass air flow sensor and the throttle body
• Faulty throttle position sensor
• Throttle position sensor harness is open or shorted
• Poor electrical connection in the throttle position sensor circuit
• Damaged mass air flow sensor

How to Fix P1121 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?

The sensor signal output is not consistent with the engine load measurement

Possible Symptoms

Engine light on (or engine service warning light soon)

P1121 MERCURY Meaning

The Powertrain Control Module (PCM) monitors a vehicle operation rationality check by comparing the detected throttle position to mass air flow readings. If during engine running self-test, the comparison of TP sensor and MAF sensor readings is not consistent with calibrated load values, the test fails and a diagnostic code is stored in the continuous memory.