Engine-Codes - Isuzu - P0030 ISUZU

P0030 ISUZU Code - HO2S Heater Control Circuit Sensor 1

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3
Table of contents

|P0030 ISUZU code possible causes

  • Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit
  • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
  • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground
  • Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

|How is the P0030 ISUZU code repair?

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.

|P0030 ISUZU code tech notes

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it take the sensor to warm up and start sending an adequate signal. The code is triggered when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the sensor and connector are OK, replacing the O2 Sensor 1 usually takes care of the problem

|What is the cost to diagnose the P0030 ISUZU code

Labor: 1.0

The cost to diagnose the P0030 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.

|When is the P0030 ISUZU code detected?

The P0030 is set when the ECM detects an open or shorted to ground condition on the heated oxygen sensor heater circuit

|What are P0030 ISUZU code possible symptoms?

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

|What is P0030 ISUZU code meaning?

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

|Need more information with the P0030 ISUZU code?

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