AutoCodes – Generic – P159C

P159C 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 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 6,408

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

What does this mean?

What are the Possible Causes of the DTC P159C?

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

How to Fix the DTC P159C?

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 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 code?

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

Need Help with the Code?

Get the P159C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P159C BMW — Idle Air Control Actuator 2 Self-Test Fault
P159C Buick — Power Take-Off Remote Engine Shutdown Switch Circuit
P159C Cadillac — Power Take-Off Remote Engine Shutdown Switch Circuit
P159C Chevrolet — Power Take-Off Remote Engine Shutdown Switch Circuit
P159C GMC — Power Take-Off Remote Engine Shutdown Switch Circuit
P159C Infiniti — G Sensor Circuit Low Input
P159C MINI — Idle Air Control Actuator 2 Self-Test Fault
P159C Nissan — G Sensor Circuit Low Input

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 Code

1. What are common symptoms of OBDII code P159C (G Sensor Circuit Low Input)?

- Common symptoms include illuminated Check Engine light, rough shifting, poor acceleration, and potential stability control issues.

2. What can cause the OBDII code P159C to trigger?

- The code P159C may be triggered by a faulty G sensor, damaged wiring in the G sensor circuit, or a malfunction in the vehicle's stability control system.

3. How serious is the OBDII code P159C?

- The severity of the code P159C depends on the underlying issue. While it may not cause immediate danger, it can affect the vehicle's performance and safety systems.

4. How can I diagnose the cause of OBDII code P159C?

- Diagnosing the code P159C typically involves using a scan tool to read the code, checking the G sensor and its wiring for damage, and testing the stability control system.

5. What are some repair tips for fixing OBDII code P159C?

- Repair tips may include replacing the faulty G sensor, repairing damaged wiring, or reprogramming the stability control system as per manufacturer's recommendations.

6. Can I drive my vehicle with the OBDII code P159C?

- It is generally not recommended to drive the vehicle with an active OBDII code, as it may lead to further issues and compromise the vehicle's performance and safety.

7. How much does it typically cost to repair OBDII code P159C?

- The cost of repairing the code P159C can vary depending on the underlying issue, but it may involve parts replacement, wiring repairs, and labor costs.

8. Can I clear the OBDII code P159C without fixing the underlying issue?

- Clearing the code without addressing the root cause is not recommended, as the issue may persist and lead to further problems down the line.

9. Will OBDII code P159C cause my vehicle to fail an emissions test?

- The code P159C may cause your vehicle to fail an emissions test, as it indicates a problem with the vehicle's emissions control system.

10. How can I prevent OBDII code P159C from recurring in the future?

- To prevent the code P159C from recurring, it's important to address the underlying issue promptly, perform regular maintenance checks, and follow the manufacturer's recommended maintenance schedule.