AutoCodes – Infiniti – P159C Infiniti

P159C Infiniti Code - G Sensor Circuit Low Input

Quick Answer

The G Sensor has a semiconductor acceleration sensor and detects the longitudinal G and tilt angle of the vehicle based on gravitational acceleration. 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: P159C Infiniti indicates G Sensor Circuit Low Input.
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 1,289

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 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P159C Infiniti Description

The G Sensor has a semiconductor acceleration sensor and detects the longitudinal G and tilt angle of the vehicle based on gravitational acceleration. In addition, the G sensor converts a detected tilt angle into an electric signal and transmits it to Engine Control Module (ECM). The Diagnostic Trouble Code (DTC) will be set when the G sensor signal to the ECM is not within factory specifications.

OBDII Code P159C Infiniti - G Sensor Circuit Low Input - AutoCodes.com — P159C Infiniti Code - G Sensor Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P159C Infiniti?

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

How to Fix the DTC P159C Infiniti?

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 P159C Infiniti 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 P159C Infiniti code?

Need more information on how to fix the P159C Infiniti code? Get Access to Factory Service Manuals

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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 P159C Infiniti Code

1. What does the OBDII code P159C mean for an Infiniti?

P159C indicates a "G Sensor Circuit Low Input," meaning the vehicle's G sensor is detecting a voltage or signal level that is lower than expected.

2. What are the common symptoms of code P159C in an Infiniti?

Symptoms may include the check engine light turning on, reduced vehicle stability, poor traction control performance, and possibly a decrease in acceleration responsiveness.

3. What causes the P159C code to appear in an Infiniti?

Common causes include a faulty G sensor, damaged wiring or connectors in the G sensor circuit, or issues with the vehicle's control module.

4. What is the G sensor's role in an Infiniti?

The G sensor measures lateral or longitudinal acceleration to assist with stability control, traction control, and other driving dynamics systems.

5. How is the P159C code diagnosed?

A mechanic will use a scan tool to confirm the code, inspect the G sensor and its wiring for damage, and test the sensor's output voltage to ensure it's within the expected range.

6. Can a faulty G sensor cause driveability issues in an Infiniti?

Yes, a defective G sensor can affect stability control, traction control, and overall handling, potentially compromising driving safety.

7. How do you fix the P159C code on an Infiniti?

Repairs may involve replacing a faulty G sensor, repairing or replacing damaged wiring or connectors, and resetting the system with a scan tool.

8. Is it safe to drive an Infiniti with the P159C code?

While the car may still be drivable, it can compromise safety features like traction and stability control, so itâ€™s recommended to address the issue promptly.

9. How much does it cost to repair the P159C code on an Infiniti?

The cost depends on the specific issue, but replacing a G sensor typically ranges from $150 to $400, including parts and labor.

10. Can a low battery cause the P159C code in an Infiniti?

A weak or low battery can potentially cause electrical issues, including triggering this code, but it is less common compared to sensor or wiring problems.