What is P1120 : Engine Error code Causes Explained
The P1120 engine error code is related to the throttle position sensor (TPS) circuit and can be caused by a defective TPS, wiring difficulties, or ECM faults, resulting in poor throttle response.
How to Identify a DTCs Number
Diagnostic Trouble Codes (DTCs) like P1120 indicate car system problems. Connect an OBD-II scanner to the vehicle’s OBD-II port under the dashboard to get the DTC number. The scanner will obtain the error code and a brief explanation.
The trouble codes (DTCs) are 5 characters: 1 letter, 4 numbers. P-Powertrain indicates the fault code’s location. Generic or manufacturer-specific codes are indicated by the first digit. The second digit denotes the subsystem (7=transmission). The last two numbers describe the issue.
The P1120 engine error code occurs when the Throttle Position Sensor (TPS) circuit sends an abnormal voltage signal to the ECM. This can lead to poor acceleration, rough idling, or stalling due to incorrect throttle input readings.
Causes of P1120 Code:
- Faulty HO2 Sensor Bank 2 Sensor 1:
The HO2 sensor on Bank 2 Sensor 1 may be faulty, leading to an open heater circuit. - Open or Shorted Harness:
An open or shorted harness in the H02 sensor Bank 2 Sensor 1 can disrupt the heater circuit functionality. - Poor Electrical Connections:
Poor electrical connections in the HO2 sensor Bank 2 Sensor 1 circuit can cause an open circuit condition
Risk Level of P1120 Error Code:
The P1120 code has a high risk level, which indicates that the problem might have a major impact on vehicle safety and performance. It seems to be because the car’s ECU has identified a serious problem with the TPS, which impacts drivability and engine control.
It is strongly advised to get the car diagnosed and repaired if the P1120 code continues in order to prevent dangerous driving situations.
Common Car Brands Affected by P1120 Code:
The P1120 engine error code is commonly found in following List.
- Mazda
- Sabaru
- Chevrolet
- Ford
- Honda
- Toyota
- Hyundai
- Nissan
- Volkswagen
- GMC
Video: P1120 Engine Error code
FAQ’s
What does the P1120 engine code mean?
P1120 indicates a fault in the throttle position sensor (TPS) circuit, affecting engine performance and throttle response.
What is the risk level of the P1120 error code?
The risk level of the P1120 error code is high because it affects throttle position sensor functionality, leading to unstable acceleration, poor engine response, and potential limp mode activation.
What causes the P1120 error code?
Common causes include a faulty TPS, damaged wiring, poor electrical connections, or ECM issues.