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Engine-Codes – Isuzu – P1392 Isuzu

P1392 Isuzu Code - G-Sensor Voltage Low Rough Road Sensor

Quick Answer

The P1392 code for Isuzu vehicles indicates a low voltage condition in the G-Sensor, also known as the Rough Road Sensor. Common causes include Faulty G-Sensor/Rough Road Sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or debris affecting the sensor's 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
P1392 Isuzu indicates G-Sensor Voltage Low Rough Road Sensor.
Common causes
Common causes include Faulty G-Sensor/Rough Road Sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or debris affecting the sensor's 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.
What is this?
Table of contents Created and updated by William Orellana on Aug 20, 2024
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Code P1392 Isuzu Description

The P1392 code for Isuzu vehicles indicates a low voltage condition in the G-Sensor, also known as the Rough Road Sensor. The G-Sensor is an important component of the vehicle's stability control system, as it measures the vehicle's acceleration and deceleration forces to help maintain traction and stability on rough or uneven road surfaces. When the voltage from the G-Sensor is detected to be low, it can lead to issues with the vehicle's stability control system, potentially causing loss of traction and stability during driving.

OBDII Code P1392 Isuzu - G-Sensor Voltage Low Rough Road Sensor
P1392 Isuzu Code - G-Sensor Voltage Low Rough Road Sensor

Common Causes of P1392 Isuzu

  1. Faulty G-Sensor/Rough Road Sensor
  2. Damaged wiring or connectors in the sensor circuit
  3. Corrosion or debris affecting the sensor's connection
  4. Issues with the vehicle's stability control module
  5. Electrical issues such as a blown fuse affecting the sensor's voltage supply

Symptoms of P1392 Isuzu

  1. Traction control or stability control warning light illuminated on the dashboard
  2. Increased difficulty maintaining control of the vehicle on rough or uneven road surfaces
  3. Poor handling or steering response, especially during cornering
  4. Unusual noises or vibrations coming from the vehicle's suspension system

How to Fix P1392 Isuzu

  1. Begin by diagnosing the specific cause of the low voltage condition in the G-Sensor using a diagnostic scanner.
  2. Inspect the sensor and its wiring for any visible damage or corrosion, and repair or replace as needed.
  3. Test the sensor's voltage output to ensure it is within the manufacturer's specified range.
  4. Check and repair any issues with the stability control module or related components.
  5. Clear the error code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1392 Isuzu

The cost of repairing a P1392 code on an Isuzu vehicle can vary depending on the specific cause of the issue. In general, expect to pay between $150 to $400 for parts and labor. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple shops in your area to get a more accurate estimate.

What does this mean?

Tech Notes for P1392 Isuzu

Check for poor connections at PCM. Inspect wiring harness for damage by, moving connectors and wiring harnesses while observing any change on scan tool G-sensor display. Since the G-sensor shares PCM reference and ground terminals with the MAP sensor, a damaged MAP harness or sensor could cause a G-sensor DTC to be set.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1392 Isuzu Code

1. What are common symptoms of OBDII code P1392 in an Isuzu related to the G-Sensor Voltage Low Rough Road Sensor?

The common symptoms include rough idling, engine misfires, reduced engine performance, and potentially stalling while driving.

2. What does the OBDII code P1392 indicating G-Sensor Voltage Low Rough Road Sensor mean in an Isuzu?

This code indicates that the G-Sensor voltage is reading lower than expected, particularly when the vehicle is on rough road conditions.

3. What are the potential causes of OBDII code P1392 in an Isuzu?

Possible causes include a faulty G-Sensor, damaged wiring or connectors to the sensor, poor sensor calibration, or issues with the sensor's mounting.

4. How can I diagnose the issue related to OBDII code P1392 in my Isuzu?

Diagnosis typically involves checking the G-Sensor's voltage output, inspecting the sensor and its wiring for damage, verifying proper sensor mounting, and ensuring calibration is correct.

5. Can driving on rough roads trigger OBDII code P1392 in an Isuzu?

Yes, driving on rough roads can potentially trigger this code if there are issues with the G-Sensor's voltage readings under such conditions.

6. Will OBDII code P1392 cause permanent damage to my Isuzu?

While the code itself may not cause direct damage, ignoring the underlying issue that triggered it can lead to further engine performance problems over time.

7. How can I repair OBDII code P1392 related to the G-Sensor Voltage Low Rough Road Sensor in my Isuzu?

Repair options may include replacing the G-Sensor, repairing damaged wiring or connectors, re-mounting the sensor properly, and calibrating the sensor as needed.

8. Can I drive my Isuzu with OBDII code P1392 present?

It is not recommended to continue driving your Isuzu with this code present, as it can lead to potential engine performance issues and safety concerns.

9. Are there any DIY fixes for OBDII code P1392 in an Isuzu?

Depending on your automotive repair skills, you may be able to check the sensor's connections and wiring for damage. However, professional diagnosis and repair are often recommended for this issue.

10. How much does it typically cost to repair OBDII code P1392 in an Isuzu?

The cost of repair can vary based on the specific cause of the issue, but it may involve parts and labor expenses ranging from $100 to $500 or more, depending on the extent of the problem.

Discuss the causes and fixes for P1392 Isuzu OBDII Code

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  • saludos buenas noches soy felix tengo una isuzu trooper 1996 el antiguo dueño le cambio el motor y le puso el 6vd1 de rodeo 1996 S , la computadora esta pidiendo el codigo p1392 , pero no veo en ningun lado donde esta ese sensor, no se de que trata ese codigo si me pueden ayudar gracias.

    Reply to Comment

  • Hola Feliz, desafortunadamente no tengo mucha infomacion para su Isuzu. Pero encontre que el sensor esta al lado derecho de el tanque de gasolina. Tambien encontre que si el MAP sensor esta malo, tambien tira este codigo. Espero que le ayude eso.

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