AutoCodes – Isuzu – P1391 Isuzu

P1391 Isuzu Code - G-Sensor Performance Rough road sensor

Quick Answer

P1391 Isuzu indicates G-Sensor Performance Rough road sensor. Common causes include Faulty G-Sensor, G-Sensor harness is open or shorted, G-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: P1391 Isuzu indicates G-Sensor Performance Rough road sensor.
Common causes: Common causes include Faulty G-Sensor, G-Sensor harness is open or shorted, G-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.

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Code Popularity 5,704

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 17, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1391 Isuzu Description

OBDII Code P1391 Isuzu - G-Sensor Performance Rough road sensor - AutoCodes.com — P1391 Isuzu Code - G-Sensor Performance Rough road sensor

What does this mean?

What are the Possible Causes of the DTC P1391 Isuzu?

Faulty G-Sensor
G-Sensor harness is open or shorted
G-Sensor circuit poor electrical connection

How to Fix the DTC P1391 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 P1391 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.

Need more information about the P1391 Isuzu code?

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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 P1391 Isuzu Code

1. What are the common symptoms of OBDII code P1391 Isuzu related to G-Sensor performance rough road sensor?

- Common symptoms include rough idling, engine misfires, stalling, and a noticeable decrease in engine performance.

2. What are the possible causes of OBDII code P1391 Isuzu related to the G-Sensor performance rough road sensor?

- Potential causes include a faulty G-Sensor, wiring issues, poor connections, or a problem with the rough road sensor itself.

3. How can I diagnose the issue causing OBDII code P1391 Isuzu related to the G-Sensor performance rough road sensor?

- Diagnosis typically involves using a diagnostic scanner to read the trouble code and performing a thorough inspection of the G-Sensor, wiring, and rough road sensor.

4. Can a DIYer repair OBDII code P1391 Isuzu related to the G-Sensor performance rough road sensor?

- While some DIY enthusiasts may attempt to fix the issue, it is recommended to seek professional help due to the complexity of diagnosing and repairing sensor-related problems.

5. What are the repair options for OBDII code P1391 Isuzu related to the G-Sensor performance rough road sensor?

- Repair options may include replacing the faulty G-Sensor, repairing wiring issues, ensuring proper sensor connections, or recalibrating the rough road sensor.

6. How critical is it to address OBDII code P1391 Isuzu related to the G-Sensor performance rough road sensor?

- Ignoring the issue can lead to further engine performance problems, decreased fuel efficiency, and potential safety risks, so it is important to address the code promptly.

7. Can weather conditions affect the performance of the rough road sensor triggering OBDII code P1391 Isuzu?

- Extreme weather conditions and rough road surfaces can potentially impact the sensor's performance and trigger the code, emphasizing the importance of regular sensor maintenance.

8. Will resetting the OBDII code P1391 Isuzu related to the G-Sensor performance rough road sensor temporarily solve the issue?

- Resetting the code may temporarily clear the warning light, but if the underlying problem is not addressed, the code is likely to reappear once the issue resurfaces.

9. Are there any preventive measures to avoid OBDII code P1391 Isuzu related to the G-Sensor performance rough road sensor?

- Regular maintenance checks, ensuring proper sensor connections, and avoiding rough driving conditions can help prevent sensor-related issues triggering the code.

10. How can a mechanic perform a thorough inspection to pinpoint the exact cause of OBDII code P1391 Isuzu related to the G-Sensor performance rough road sensor?

- A mechanic can use specialized diagnostic tools, conduct sensor tests, inspect wiring for damage, and check the rough road sensor's functionality to determine the root cause of the issue.