P1120 Infiniti Code - Secondary Throttle Position Sensor
Quick Answer
The P1120 code for Infiniti vehicles refers to an issue with the Secondary Throttle Position Sensor. Common causes include Faulty secondary throttle position sensor, Wiring or connector issues in the sensor circuit, Intake manifold vacuum leaks. 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 Infiniti indicates Secondary Throttle Position Sensor.
- Common causes
- Common causes include Faulty secondary throttle position sensor, Wiring or connector issues in the sensor circuit, Intake manifold vacuum leaks.
- 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 P1120 Infiniti Description
The P1120 code for Infiniti vehicles refers to an issue with the Secondary Throttle Position Sensor. This sensor is responsible for monitoring the position of the secondary throttle plate in the intake manifold. The secondary throttle plate helps regulate the amount of air entering the engine, affecting the air-fuel mixture and ultimately the engine's performance. When the sensor detects a problem with the secondary throttle position, it can lead to issues with engine performance, fuel efficiency, and overall drivability.
Common Causes of P1120 Infiniti
- Faulty secondary throttle position sensor
- Wiring or connector issues in the sensor circuit
- Intake manifold vacuum leaks
- Carbon buildup on the throttle body
- ECM software issues or glitches
Symptoms of P1120 Infiniti
- Check Engine Light illuminated on the dashboard
- Loss of power or hesitation during acceleration
- Rough idling or engine stalling
- Decreased fuel efficiency
- Difficulty starting the engine
How to Fix P1120 Infiniti
- Diagnose the issue by connecting a diagnostic scanner to retrieve the fault code and checking the secondary throttle position sensor's data readings.
- Inspect the wiring and connectors for any damage or corrosion. Repair or replace as needed.
- Clean the throttle body and intake manifold to remove any carbon buildup that could be affecting sensor readings.
- Test the secondary throttle position sensor using a multimeter to ensure proper functionality. Replace the sensor if necessary.
- Clear the fault code from the ECM memory and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix P1120 Infiniti
The cost of repairing a P1120 code on an Infiniti vehicle can vary depending on the specific model and year, as well as the extent of the issue. In general, the cost of parts for a new secondary throttle position sensor can range from $50 to $150, while labor costs can add an additional $100 to $200. Overall, the total repair cost for addressing a P1120 code typically falls in the range of $150 to $350. It's important to note that prices may vary based on location, the repair shop's labor rates, and any additional services required. It is recommended to consult with a certified mechanic or dealership for a more accurate cost estimate.
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