AutoCodes – Pontiac – C0191 Pontiac

C0191 Pontiac Code - Longitudinal Accelerometer Signal Voltage

Quick Answer

The ignition 1 circuit supplies 12 volts to the longitudinal accelerometer. Common causes include Faulty Yaw Sensor/Lateral Accelerometer Sensor, Yaw Sensor/Lateral Accelerometer Sensor harness is open or shorted, Yaw Sensor/Lateral Accelerometer 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: C0191 Pontiac indicates Longitudinal Accelerometer Signal Voltage.
Common causes: Common causes include Faulty Yaw Sensor/Lateral Accelerometer Sensor, Yaw Sensor/Lateral Accelerometer Sensor harness is open or shorted, Yaw Sensor/Lateral Accelerometer 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 978

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 May 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C0191 Pontiac Description

The ignition 1 circuit supplies 12 volts to the longitudinal accelerometer. When the vehicle is not moving, or is being driven at a constant, steady speed, longitudinal acceleration is 0 m/sec/sec (0 ft/sec/sec) and the longitudinal accelerometer signal voltage is very near 2.5 volts. This is referred to as longitudinal accelerometer bias voltage. Vehicle acceleration or deceleration causes the longitudinal accelerometer signal voltage to increase or decrease. The harder the acceleration or deceleration, the greater the change in signal voltage.

OBDII Code C0191 Pontiac - Longitudinal Accelerometer Signal Voltage - AutoCodes.com — C0191 Pontiac Code - Longitudinal Accelerometer Signal Voltage

What does this mean?

What are the Possible Causes of the DTC C0191 Pontiac?

Faulty Yaw Sensor/Lateral Accelerometer Sensor
Yaw Sensor/Lateral Accelerometer Sensor harness is open or shorted
Yaw Sensor/Lateral Accelerometer Sensor circuit poor electrical connection

How to Fix the DTC C0191 Pontiac?

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 C0191 Pontiac 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 C0191 Pontiac code?

Need more information on how to fix the C0191 Pontiac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0191 Pontiac 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 C0191 Pontiac Code

1. What are the common symptoms of OBDII code C0191 in a Pontiac related to the Longitudinal Accelerometer Signal Voltage?

- The common symptoms include the traction control light being illuminated on the dashboard, erratic ABS operation, and potential loss of stability control.

2. What could be causing the OBDII code C0191 in a Pontiac indicating an issue with the Longitudinal Accelerometer Signal Voltage?

- Possible causes may include a malfunctioning longitudinal accelerometer sensor, damaged wiring or connectors, or issues with the accelerometer circuit itself.

3. How can I diagnose the OBDII code C0191 in my Pontiac that points to a problem with the Longitudinal Accelerometer Signal Voltage?

- A thorough visual inspection of the wiring and connectors, testing the longitudinal accelerometer sensor, and checking the circuit for continuity can help diagnose the issue.

4. Can I drive my Pontiac with the OBDII code C0191 related to the Longitudinal Accelerometer Signal Voltage active?

- It is not recommended to drive the vehicle with this code active, as it may affect the proper functioning of the traction control system and stability control.

5. Is it possible to reset the OBDII code C0191 in a Pontiac without addressing the underlying issue with the Longitudinal Accelerometer Signal Voltage?

- While it is possible to clear the code temporarily, it is important to address the root cause to prevent potential safety and performance issues in the future.

6. What are some repair tips for resolving the OBDII code C0191 in a Pontiac associated with the Longitudinal Accelerometer Signal Voltage?

- Repair tips may include checking and repairing any damaged wiring, replacing the longitudinal accelerometer sensor if faulty, and ensuring all connections are secure.

7. How critical is it to fix the OBDII code C0191 in a Pontiac related to the Longitudinal Accelerometer Signal Voltage promptly?

- It is important to address this issue promptly to ensure the proper functioning of safety systems like traction control and stability control while driving.

8. Can extreme weather conditions or rough driving cause the OBDII code C0191 related to the Longitudinal Accelerometer Signal Voltage in a Pontiac?

- Extreme weather conditions or rough driving could potentially contribute to issues with the longitudinal accelerometer sensor or its related components, triggering this code.

9. Are there any recalls or technical service bulletins related to the OBDII code C0191 in Pontiac vehicles concerning the Longitudinal Accelerometer Signal Voltage?

- It is recommended to check with the manufacturer or a certified dealership to see if there are any recalls or technical service bulletins addressing this specific OBDII code.

10. How much can I expect to spend on repairing the OBDII code C0191 in my Pontiac associated with the Longitudinal Accelerometer Signal Voltage?

- The cost of repair can vary depending on the root cause of the issue, but it may involve expenses for parts replacement, labor, and diagnostic testing.