P0120 Isuzu Code - Throttle Position Sensor 1 Circuit
Quick Answer
The throttle position sensor (TPS) responds to the accelerator pedal movement. Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor 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
- P0120 Isuzu indicates Throttle Position Sensor 1 Circuit.
- Common causes
- Common causes include Faulty Throttle Position Sensor, Throttle Position Sensor circuit is open or shorted, Throttle Position Sensor 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 P0120 Isuzu Description
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.
What are the Possible Causes of the DTC P0120 Isuzu?
- Faulty Throttle Position Sensor
- Throttle Position Sensor circuit is open or shorted
- Throttle Position Sensor poor electrical connection
How to Fix the DTC P0120 Isuzu?
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 P0120 Isuzu 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 P0120 Isuzu Code
1. What are the common symptoms of OBDII code P0120 in an Isuzu related to the Throttle Position Sensor 1 Circuit?
The common symptoms of code P0120 in an Isuzu include issues with acceleration, poor fuel economy, stalling, and potentially even difficulty starting the vehicle.
2. What are some possible causes of OBDII code P0120 in an Isuzu?
Common causes of code P0120 in an Isuzu include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or a problem with the engine control module.
3. How can I diagnose the Throttle Position Sensor 1 Circuit issue causing OBDII code P0120 in my Isuzu?
You can diagnose the issue by using a scan tool to read the code, visually inspecting the sensor and its wiring for damage, testing the sensor's resistance, and checking for proper voltage signals.
4. Can I drive my Isuzu with OBDII code P0120 related to the Throttle Position Sensor 1 Circuit?
It is not recommended to drive your Isuzu with an active P0120 code, as it can lead to poor performance and potential safety hazards. It's best to address the issue promptly.
5. How can I repair OBDII code P0120 in my Isuzu due to a faulty Throttle Position Sensor 1 Circuit?
To repair the issue, you may need to replace the throttle position sensor, repair any damaged wiring or connectors, or reprogram the engine control module if necessary.
6. Are there any DIY tips for troubleshooting OBDII code P0120 in an Isuzu?
You can start by checking the sensor's wiring and connectors for any visible damage, cleaning the sensor connector pins, and ensuring proper sensor alignment and mounting.
7. Is it necessary to reset the OBDII system after repairing code P0120 related to the Throttle Position Sensor 1 Circuit in my Isuzu?
Yes, it's recommended to clear the code and reset the OBDII system after repairing the issue to ensure the code doesn't reappear and to verify that the problem has been resolved.
8. Can a dirty throttle body cause OBDII code P0120 to trigger in an Isuzu?
While a dirty throttle body can affect throttle response, it is not a direct cause of code P0120. However, it's a good practice to keep the throttle body clean to prevent related issues.
9. Will a faulty oxygen sensor trigger OBDII code P0120 in an Isuzu?
No, a faulty oxygen sensor typically does not trigger code P0120. This code is specific to the Throttle Position Sensor 1 Circuit and is usually caused by issues related to that component.
10. Is professional help required to diagnose and repair OBDII code P0120 in an Isuzu related to the Throttle Position Sensor 1 Circuit?
While some DIY troubleshooting is possible, diagnosing and repairing code P0120 may require specialized tools and expertise. It is often best to seek professional help for accurate diagnosis and proper repair.
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