AutoCodes – Buick – C1278 Buick

C1278 Buick Code - TCS Temporarily Inhibited By PCM

Quick Answer

The Powertrain Control Module (PCM) monitors various parameters. Common causes include Faulty Electronic Brake Control Module (EBCM), Faulty Powertrain Control Module (PCM). 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: C1278 Buick indicates TCS Temporarily Inhibited By PCM.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Faulty Powertrain Control Module (PCM).
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 1,370

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 Sep 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1278 Buick Description

The Powertrain Control Module (PCM) monitors various parameters. The PCM sets the OBDII code and will not allow traction control operation if any parameter falls outside a specified range.

OBDII Code C1278 Buick - TCS Temporarily Inhibited By PCM - AutoCodes.com — C1278 Buick Code - TCS Temporarily Inhibited By PCM

What does this mean?

What are the Possible Causes of the DTC C1278 Buick?

Faulty Electronic Brake Control Module (EBCM)
Faulty Powertrain Control Module (PCM)

How to Fix the DTC C1278 Buick?

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 C1278 Buick 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 C1278 Buick Code

1. What does the OBDII code C1278 Buick mean?

The code C1278 in a Buick indicates that the Traction Control System (TCS) has been temporarily inhibited by the Powertrain Control Module (PCM).

2. What are the common symptoms of a C1278 Buick code?

Common symptoms of a C1278 code may include the TCS warning light illuminating on the dashboard, reduced traction control functionality, and potential loss of stability while driving.

3. What are the possible causes of a C1278 Buick trouble code?

Potential causes of a C1278 code in a Buick include faulty wheel speed sensors, issues with the ABS module, damaged wiring or connectors in the TCS system, or a malfunctioning PCM.

4. How can I diagnose a C1278 Buick code?

Diagnosing a C1278 code typically involves using a diagnostic scanner to retrieve the specific fault codes stored in the vehicle's system, conducting a visual inspection of the TCS components, and performing tests on the wheel speed sensors and related circuits.

5. How can I repair a C1278 Buick trouble code?

Repairing a C1278 code may involve replacing faulty wheel speed sensors, repairing damaged wiring or connectors, resetting the TCS system, or recalibrating the PCM to resolve the temporary inhibition of the TCS.

6. Can I drive my Buick with a C1278 code?

It is not recommended to drive your Buick with a C1278 code, as it can affect the vehicle's traction control system and compromise driving safety. It is best to address the issue promptly to prevent further complications.

7. How much does it cost to fix a C1278 Buick code?

The cost of fixing a C1278 code in a Buick can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor costs. It is advisable to consult a professional mechanic for an accurate estimate.

8. Is the C1278 Buick code a serious problem?

While the C1278 code may not directly impact the drivability of your Buick, it is still considered a serious issue as it affects the Traction Control System, which plays a crucial role in vehicle stability and safety.

9. Can a C1278 code be cleared/reset without repairs?

Clearing or resetting a C1278 code without addressing the underlying cause may temporarily eliminate the warning light, but the issue is likely to reoccur. It is best to diagnose and repair the problem to ensure proper functionality of the TCS.

10. How can I prevent the C1278 Buick trouble code from recurring?

To prevent the C1278 code from recurring, it is important to perform regular maintenance on your Buick, including inspecting and servicing the TCS components, keeping the wheel speed sensors clean, and addressing any warning lights promptly.