AutoCodes – Cadillac – C0191 Cadillac

C0191 Cadillac 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 Cadillac 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.

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Code Popularity 951

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
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Code C0191 Cadillac 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 Cadillac - Longitudinal Accelerometer Signal Voltage - AutoCodes.com — C0191 Cadillac Code - Longitudinal Accelerometer Signal Voltage

What does this mean?

What are the Possible Causes of the DTC C0191 Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 C0191 Cadillac Code

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

- Common symptoms include the illumination of the check engine light, traction control issues, and potential loss of stability control.

2. What are the possible causes of OBDII code C0191 in a Cadillac?

- The code C0191 in a Cadillac is commonly caused by a faulty longitudinal accelerometer, wiring issues, or a malfunction in the accelerometer circuit.

3. How can I diagnose the OBDII code C0191 in my Cadillac?

- Diagnosing the code C0191 involves using a professional OBDII scanner to read the fault codes, checking the wiring connections to the longitudinal accelerometer, and testing the accelerometer itself for proper functioning.

4. Can I fix the OBDII code C0191 in my Cadillac on my own?

- While some skilled DIYers may be able to fix the issue, it is recommended to seek professional help for diagnosing and repairing the Longitudinal Accelerometer Signal Voltage related problems to ensure proper functioning and safety.

5. Is it safe to drive my Cadillac with the OBDII code C0191 present?

- It is not recommended to drive your Cadillac with the code C0191 present, as it can affect the vehicle's stability control and traction control systems, potentially compromising safety.

6. How much does it typically cost to repair the OBDII code C0191 in a Cadillac?

- The cost of repairing the code C0191 can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor.

7. Can a bad battery or alternator cause the OBDII code C0191 in a Cadillac?

- While a bad battery or alternator can cause various electrical issues in a vehicle, they are not commonly associated with triggering the specific code C0191 related to the Longitudinal Accelerometer Signal Voltage in a Cadillac.

8. Will resetting the check engine light make the OBDII code C0191 go away permanently?

- Simply resetting the check engine light will not resolve the underlying issue causing the code C0191. It is important to diagnose and fix the root cause of the problem to prevent the code from reoccurring.

9. How long does it take to repair the OBDII code C0191 in a Cadillac?

- The repair time for the code C0191 can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a day to complete the repair.

10. Can a damaged wheel speed sensor trigger the OBDII code C0191 in a Cadillac?

- A damaged wheel speed sensor is not typically associated with triggering the code C0191 related to the Longitudinal Accelerometer Signal Voltage in a Cadillac. It is more likely to be caused by issues with the accelerometer or its circuitry.