P1120 Chevrolet Code - Throttle Position Sensor 1 Circuit
Quick Answer
The Throttle Position (TP) sensor is a potentiometer. Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor harness is open or shorted, Throttle Position Sensor circuit poor electrical connection. 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 Chevrolet indicates Throttle Position Sensor 1 Circuit.
- Common causes
- Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor harness is open or shorted, Throttle Position Sensor circuit poor electrical connection.
- 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.
Code P1120 Chevrolet Description
TP sensor Signal voltage should be about 0.6 volt at idle. The TP sensor voltage should increase to above 4.0 volts at wide open throttle (WOT).
What are the Possible Causes of the DTC P1120 Chevrolet?
- Faulty Throttle Position Sensor
- Throttle Position Sensor harness is open or shorted
- Throttle Position Sensor circuit poor electrical connection
- Throttle Position Sensor not properly adjusted
How to Fix the DTC P1120 Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1120 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1120 Chevrolet Code
1. What are the common symptoms of OBDII code P1120 in a Chevrolet related to the Throttle Position Sensor 1 Circuit?
- Common symptoms include poor acceleration, stalling, rough idling, and a decrease in fuel efficiency.
2. What are some possible causes of the OBDII code P1120 in a Chevrolet indicating an issue with the Throttle Position Sensor 1 Circuit?
- Potential causes may include a faulty throttle position sensor, wiring issues, poor electrical connections, or a problem with the engine control module.
3. How can I diagnose the OBDII code P1120 on my Chevrolet that points to a problem with the Throttle Position Sensor 1 Circuit?
- To diagnose this issue, you can use an OBDII scanner to retrieve the trouble codes, visually inspect the throttle position sensor and its wiring, and perform voltage tests to check for proper sensor operation.
4. Is it safe to continue driving my Chevrolet with the OBDII code P1120 related to the Throttle Position Sensor 1 Circuit?
- It is not recommended to drive your vehicle with this code as it can lead to performance issues and potential safety hazards. It is best to address the underlying problem promptly.
5. How can I repair the OBDII code P1120 in my Chevrolet associated with the Throttle Position Sensor 1 Circuit?
- Repairing this code typically involves replacing the throttle position sensor if it is faulty, checking and repairing any damaged wiring, and ensuring proper connections.
6. Can a dirty throttle body cause the OBDII code P1120 to trigger in a Chevrolet?
- Yes, a dirty throttle body can sometimes lead to incorrect throttle position readings, which may trigger the P1120 code related to the Throttle Position Sensor 1 Circuit.
7. Will resetting the OBDII code P1120 in my Chevrolet temporarily fix the issue with the Throttle Position Sensor 1 Circuit?
- Resetting the code may temporarily clear the warning light, but if the underlying problem persists, the code is likely to return. It is important to diagnose and address the root cause.
8. Are there any preventive maintenance steps I can take to avoid encountering the OBDII code P1120 in my Chevrolet?
- Regularly inspecting and cleaning the throttle body, checking the throttle position sensor for any signs of wear, and ensuring proper electrical connections can help prevent issues leading to this code.
9. Can a malfunctioning accelerator pedal position sensor cause the OBDII code P1120 in a Chevrolet?
- Yes, a faulty accelerator pedal position sensor can sometimes cause similar symptoms to those triggered by issues with the Throttle Position Sensor 1 Circuit and may lead to the P1120 code.
10. How long does it typically take to repair the OBDII code P1120 in a Chevrolet associated with the Throttle Position Sensor 1 Circuit?
- The repair time can vary based on the exact cause of the issue, but replacing a faulty throttle position sensor and addressing related wiring problems can usually be completed within a few hours at a repair shop.
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