AutoCodes – Suzuki – P1391 Suzuki

P1391 Suzuki Code - G Sensor Rough Road Rationality

Quick Answer

P1391 Suzuki indicates G Sensor Rough Road Rationality. 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 Suzuki indicates G Sensor Rough Road Rationality.
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 3,808
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 17, 2019
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Code P1391 Suzuki Description

OBDII Code P1391 Suzuki - G Sensor Rough Road Rationality - AutoCodes.com
P1391 Suzuki Code - G Sensor Rough Road Rationality

What are the Possible Causes of the DTC P1391 Suzuki?

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

How to Fix the DTC P1391 Suzuki?

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 Suzuki 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 Suzuki code?

Need more information on how to fix the P1391 Suzuki code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1391 Suzuki code diagnosed by a professional: Find a repair shop in your area

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 Suzuki Code

1. What are the common symptoms of OBDII code P1391 (G Sensor Rough Road Rationality) in a Suzuki vehicle?

Symptoms may include rough idling, engine misfires, loss of power, and the illumination of the Check Engine Light.

2. What can cause the OBDII code P1391 to trigger in a Suzuki car?

The code P1391 is often triggered by a malfunction in the G sensor, which detects rough road conditions and relays the information to the vehicle's ECU.

3. How serious is the OBDII code P1391 (G Sensor Rough Road Rationality) in a Suzuki?

While the code itself may not cause immediate harm to the vehicle, it can lead to poor engine performance and decreased fuel efficiency if left unresolved.

4. Can driving on rough roads or off-roading trigger the P1391 code in a Suzuki vehicle?

Yes, excessive driving on rough roads or off-roading activities can sometimes trigger the code if the G sensor is not functioning properly.

5. What are some DIY repair tips for addressing the OBDII code P1391 in a Suzuki?

DIY repair tips may include checking the G sensor's wiring connections, inspecting for any physical damage to the sensor, and ensuring proper mounting and alignment.

6. Is it safe to continue driving with the OBDII code P1391 illuminated in a Suzuki car?

It is generally not recommended to continue driving with the P1391 code illuminated, as it can lead to further engine issues and potential safety concerns.

7. How can a mechanic diagnose and repair the OBDII code P1391 in a Suzuki vehicle?

A mechanic may use a diagnostic scanner to retrieve the code, inspect the G sensor and its related components, and perform any necessary repairs or replacements.

8. Are there any recalls or technical service bulletins related to the OBDII code P1391 in Suzuki vehicles?

It's advisable to check with Suzuki dealerships or online databases for any recalls or technical service bulletins related to the P1391 code in specific Suzuki models.

9. Can a faulty G sensor cause other codes to trigger in addition to P1391 in a Suzuki car?

Yes, a malfunctioning G sensor can sometimes cause related codes to trigger, such as ABS or traction control system codes, depending on the vehicle's make and model.

10. How much can a typical repair for the OBDII code P1391 (G Sensor Rough Road Rationality) cost in a Suzuki vehicle?

The cost of repairing the P1391 code in a Suzuki can vary depending on the extent of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

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