P0120 Infiniti Code - Throttle Position Sensor Signal Range/Performance
Quick Answer
The P0120 code in an Infiniti indicates an issue with the Throttle Position Sensor (TPS) signal range or performance. Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the TPS sensor. 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
- P0120 Infiniti indicates Throttle Position Sensor Signal Range/Performance.
- Common causes
- Common causes include Faulty Throttle Position Sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the TPS sensor.
- 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 P0120 Infiniti Description
The P0120 code in an Infiniti indicates an issue with the Throttle Position Sensor (TPS) signal range or performance. The TPS is a crucial component of the vehicle's electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). The ECM uses this data to determine the appropriate air-fuel mixture for combustion, as well as the ignition timing.
Common Causes of P0120 Infiniti
- Faulty Throttle Position Sensor
- Damaged wiring or connectors in the TPS circuit
- Corrosion or contamination in the TPS sensor
- Issues with the ECM or related components
Symptoms of P0120 Infiniti
- Poor acceleration or lack of power
- Rough idling or stalling
- Hesitation or jerking during acceleration
- Check Engine Light illuminated on the dashboard
How to Fix P0120 Infiniti
- Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific trouble code and confirm the issue.
- Inspect the TPS sensor, wiring, and connectors for any visible damage or corrosion. Replace any damaged components as needed.
- Test the TPS sensor using a multimeter to ensure it is functioning within the specified range. Adjust or replace the sensor if necessary.
- Clear the trouble code from the ECM's memory using the diagnostic scanner and perform a test drive to verify that the issue has been resolved.
- If the problem persists, further diagnosis may be required to identify any underlying issues with the ECM or other related components.
Cost to Fix P0120 Infiniti
The typical repair costs for addressing a P0120 code in an Infiniti can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more competitive pricing. For a more accurate estimate, it is recommended to consult with local auto repair shops.
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