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C1250 Buick Code - Lateral Acceleration Sensor Circuit High Voltage

Quick Answer

The C1250 diagnostic trouble code (DTC) indicates a high voltage condition in the lateral acceleration sensor circuit of a Buick vehicle. Common causes include Faulty Lateral Acceleration Sensor: The sensor itself may be malfunctioning due to internal failure or damage, Wiring Issues: Damaged, frayed, or corroded wiring in the sensor circuit can lead to high voltage readings, Connector Problems: Loose or corroded connectors can disrupt the electrical signal, causing erroneous readings. 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
C1250 Buick indicates Lateral Acceleration Sensor Circuit High Voltage.
Common causes
Common causes include Faulty Lateral Acceleration Sensor: The sensor itself may be malfunctioning due to internal failure or damage, Wiring Issues: Damaged, frayed, or corroded wiring in the sensor circuit can lead to high voltage readings, Connector Problems: Loose or corroded connectors can disrupt the electrical signal, causing erroneous readings.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 04, 2024
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Code C1250 Buick Description

The C1250 diagnostic trouble code (DTC) indicates a high voltage condition in the lateral acceleration sensor circuit of a Buick vehicle. The lateral acceleration sensor is a crucial component of the vehicle's stability control system, which monitors the side-to-side acceleration of the vehicle during cornering. This sensor provides vital data to the vehicle's electronic control unit (ECU), enabling it to make real-time adjustments to the braking system and traction control to maintain vehicle stability and prevent skidding or loss of control.

OBDII Code C1250 Buick - Lateral Acceleration Sensor Circuit High Voltage
C1250 Buick Code - Lateral Acceleration Sensor Circuit High Voltage

Common Causes of C1250 Buick

  1. Faulty Lateral Acceleration Sensor: The sensor itself may be malfunctioning due to internal failure or damage.
  2. Wiring Issues: Damaged, frayed, or corroded wiring in the sensor circuit can lead to high voltage readings.
  3. Connector Problems: Loose or corroded connectors can disrupt the electrical signal, causing erroneous readings.
  4. ECU Malfunction: A fault in the vehicle's electronic control unit may misinterpret sensor data, leading to high voltage codes.
  5. Calibration Issues: If the sensor has not been properly calibrated or has been replaced without calibration, it may produce incorrect voltage readings.

Symptoms of C1250 Buick

  1. Warning Light Activation: The traction control or stability control warning light may illuminate on the dashboard.
  2. Unstable Handling: The vehicle may feel unstable during cornering, with a tendency to slide or skid.
  3. Reduced Traction Control Functionality: The traction control system may engage unexpectedly or fail to activate when needed.
  4. Erratic Sensor Readings: The vehicle's onboard diagnostic system may display erratic or inconsistent readings related to lateral acceleration.
  5. Increased Tire Wear: Premature tire wear may occur due to improper handling and stability control interventions.

How to Fix C1250 Buick

  1. Diagnostic Scan: Begin with a comprehensive diagnostic scan to confirm the C1250 code and check for any related codes that may provide additional context.
  2. Visual Inspection: Conduct a thorough visual inspection of the lateral acceleration sensor, wiring, and connectors for signs of damage, corrosion, or loose connections.
  3. Sensor Testing: Test the lateral acceleration sensor using a multimeter to check for proper voltage output and resistance values as specified by the manufacturer.
  4. Wiring Repair: If any wiring issues are found, repair or replace damaged wires and ensure all connections are secure and free from corrosion.
  5. ECU Reprogramming/Calibration: If the sensor has been replaced, ensure that it is calibrated correctly, and if necessary, reprogram the ECU to recognize the new sensor.

Cost to Fix C1250 Buick

** The cost to repair the C1250 code can vary widely based on the specific diagnosis and repair needs. On average, you might expect to pay between $200 and $600 for parts and labor. This estimate includes the cost of a new lateral acceleration sensor (if needed), wiring repairs, and labor costs for diagnostics and installation.

What does this mean?

Tech Notes for C1250 Buick









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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 C1250 Buick Code

1. What does the OBDII code C1250 mean on a Buick?

C1250 indicates a problem with the Lateral Acceleration Sensor Circuit, specifically a high voltage issue, which can affect the vehicle's stability control system.

2. What are the symptoms of code C1250 on a Buick?

Common symptoms include the ABS or traction control warning lights illuminating, reduced stability control performance, or a loss of traction control functionality.

3. What causes the C1250 code to be triggered?

The code is typically caused by a malfunctioning lateral acceleration sensor, damaged wiring or connectors, or a fault in the ABS control module.

4. Can I drive my Buick with the C1250 code active?

While the car may still be drivable, stability and traction control systems may not function properly, increasing the risk of losing control in certain conditions.

5. How do I diagnose the C1250 code on my Buick?

Start by inspecting the lateral acceleration sensor, wiring, and connectors for damage or corrosion. Use a diagnostic scan tool to confirm the fault and check sensor voltage readings.

6. Where is the lateral acceleration sensor located on a Buick?

The sensor is usually located near the center of the vehicle, under the center console or beneath the front seats.

7. How can I fix the C1250 code on my Buick?

Repairs may include replacing the lateral acceleration sensor, repairing or replacing damaged wiring, or reprogramming or replacing the ABS control module.

8. What tools are needed to fix the C1250 code?

A diagnostic scan tool, multimeter, and basic automotive repair tools like screwdrivers and wrenches are typically required.

9. How much does it cost to repair the C1250 code on a Buick?

Repair costs vary but typically range from $150 to $400, depending on whether the sensor, wiring, or ABS module needs replacement.

10. Can a faulty battery cause the C1250 code on a Buick?

A weak or failing battery can sometimes cause electrical issues, but the C1250 code is more likely due to a direct problem with the sensor or its circuit.

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