P1120 Saturn Code - Throttle Position Sensor 1 Circuit
Quick Answer
The P1120 code for Saturn vehicles refers to an issue with the Throttle Position Sensor (TPS) 1 circuit. Common causes include Faulty Throttle Position Sensor (TPS), Damaged wiring or connectors in the TPS circuit, Malfunctioning Engine Control Module (ECM). 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 Saturn indicates Throttle Position Sensor 1 Circuit.
- Common causes
- Common causes include Faulty Throttle Position Sensor (TPS), Damaged wiring or connectors in the TPS circuit, Malfunctioning Engine Control Module (ECM).
- 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 Saturn Description
The P1120 code for Saturn vehicles 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 amount of air entering the engine and adjust the fuel injection accordingly for optimal performance and fuel efficiency.
Common Causes of P1120 Saturn
- Faulty Throttle Position Sensor (TPS).
- Damaged wiring or connectors in the TPS circuit.
- Malfunctioning Engine Control Module (ECM).
- Vacuum leak affecting TPS readings.
- Corrosion or dirt affecting sensor contacts.
Symptoms of P1120 Saturn
- Poor acceleration or lack of response when pressing the gas pedal.
- Rough idling or stalling when coming to a stop.
- Hesitation or jerking during acceleration.
- Reduced fuel efficiency or increased emissions.
- Vehicle going into limp mode to prevent further damage.
How to Fix P1120 Saturn
- Begin by conducting a thorough inspection of the TPS sensor, wiring, and connectors for any visible damage or corrosion.
- Use a multimeter to test the TPS sensor's voltage and resistance to determine if it is functioning within the manufacturer's specifications.
- If the TPS sensor is faulty, replace it with a new one and ensure it is properly calibrated.
- Check and repair any damaged wiring or connectors in the TPS circuit to ensure proper communication with the ECM.
- Clear the diagnostic trouble codes from the ECM and perform a test drive to verify that the issue has been resolved.
Cost to Fix P1120 Saturn
The cost of repairing a Throttle Position Sensor 1 circuit issue can vary depending on the specific cause of the problem and the cost of parts and labor in your area. On average, the cost of replacing a TPS sensor ranges from $50 to $200, while the cost of labor can range from $80 to $150 per hour. Overall, the total repair cost for this issue could range from $150 to $500 or more, depending on the extent of the repair needed. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your vehicle make and model.
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