Engine-Codes - Isuzu - P0123 Isuzu

P0123 Isuzu Code - Throttle Position Sensor 1 High Voltage

- Code Popularity: 12,071 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the Code P0123 Isuzu?

  • Faulty throttle position sensor
  • Throttle position sensor harness is open or shorted
  • Throttle position sensor circuit poor electrical connection

|How to Fix the P0123 Isuzu Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the Cost to Diagnose the Code P0123 Isuzu?

Labor: 1.0

The cost to diagnose the P0123 Isuzu code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|When is the P0123 Isuzu Code Detected?

An excessively high voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM).

|What are Code P0123 Isuzu Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0123 Isuzu Code Mean?

The Throttle Position Sensor (TPS) responds to the accelerator pedal movement. This sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the Engine Control Module (ECM). In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
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.

Throttle Position Sensor 1 High Voltage

|Need more Information on the P0123 Isuzu Code?

Need more information on how to fix the P0123 Isuzu code? Get Access to Factory Service Manuals

|Need Help with the P0123 Isuzu Code?

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