P1120 Buick Code - Throttle Position Sensor 1 Circuit
Quick Answer
The P1120 Buick code refers to an issue with the Throttle Position Sensor (TPS) 1 circuit. Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the 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
- P1120 Buick indicates Throttle Position Sensor 1 Circuit.
- Common causes
- Common causes include Faulty throttle position sensor, Damaged wiring or connectors in the TPS circuit, Corrosion or contamination in the 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 P1120 Buick Description
The P1120 Buick code refers to an issue with the Throttle Position Sensor (TPS) 1 circuit. The throttle position sensor is a crucial component of the vehicle's electronic fuel injection system, as it monitors the position of the throttle valve and sends this information to the engine control module (ECM). The ECM uses this data to determine the appropriate fuel and air mixture for optimal engine performance.
Common Causes of P1120 Buick
- Faulty throttle position sensor
- Damaged wiring or connectors in the TPS circuit
- Corrosion or contamination in the sensor
- Issues with the ECM
- Incorrect TPS calibration
Symptoms of P1120 Buick
- Rough idling or stalling
- Hesitation or surging during acceleration
- Poor fuel efficiency
- Engine misfires
- Reduced power output
How to Fix P1120 Buick
- Begin by diagnosing the issue using an OBD-II scanner to confirm the P1120 Buick code.
- Inspect the throttle position sensor and its wiring for any visible damage, corrosion, or loose connections.
- Test the TPS sensor's resistance and voltage output to determine if it is functioning correctly.
- If the TPS sensor is faulty, replace it with a new one following the manufacturer's instructions.
- Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1120 Buick
The typical repair costs for addressing a P1120 Buick code related to the throttle position sensor circuit can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
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