P1120 Pontiac 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 Pontiac 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 Pontiac 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 Pontiac?
- 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 Pontiac?
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 Pontiac 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.
Need more information about the P1120 Pontiac code?
Need more information on how to fix the P1120 Pontiac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1120 Pontiac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1120 Pontiac Code
What does the OBDII code P1120 mean for a Pontiac?
Code P1120 indicates a problem with the Throttle Position Sensor (TPS) 1 Circuit, which is responsible for monitoring the throttle’s position and sending data to the engine control module (ECM).
What are the common symptoms of code P1120 in a Pontiac?
Symptoms may include poor acceleration, rough idling, hesitation during acceleration, reduced fuel efficiency, and the Check Engine Light being illuminated.
What causes the P1120 code to appear in a Pontiac?
Common causes include a faulty throttle position sensor, damaged wiring or connectors, issues with the ECM, or debris causing interference with the throttle mechanism.
Can a dirty throttle body cause the P1120 code?
Yes, a dirty or clogged throttle body can interfere with the throttle position sensor readings and potentially trigger code P1120.
How do you diagnose the P1120 code on a Pontiac?
Diagnosis typically involves using an OBDII scanner, inspecting the throttle position sensor and associated wiring, checking for loose connections, and testing the sensor’s voltage output.
Can you drive with the P1120 code active?
It is not recommended to drive with this code active, as it can cause unpredictable throttle response and lead to unsafe driving conditions.
How is the P1120 code fixed on a Pontiac?
Repairs may include replacing the throttle position sensor, cleaning the throttle body, repairing damaged wiring, or reprogramming or replacing the ECM if necessary.
Does the P1120 code affect engine performance?
Yes, it can significantly impact engine performance, leading to poor acceleration, stalling, and reduced efficiency.
What tools are needed to fix the P1120 code?
Essential tools include an OBDII scanner, a multimeter for testing electrical components, and basic hand tools for removing and installing parts.
How much does it cost to repair the P1120 code on a Pontiac?
Repair costs can range from $150 to $400, depending on whether the throttle position sensor, wiring, or ECM needs replacement. Labor costs may vary by location.
Discuss the causes and fixes for P1120 Pontiac OBDII Code
Code P1120 Pontiac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
