AutoCodes – Pontiac – C1277 Pontiac

C1277 Pontiac Code - Requested Torque Signal Circuit Malfunction

Quick Answer

The Electronic Brake Control Module (EBCM) and the Powertrain Control Module (PCM) simultaneously control the traction control. Common causes include Faulty Electronic Brake Control Module (EBCM), Faulty Powertrain Control Module (PCM), EBCM harness is open or shorted. 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: C1277 Pontiac indicates Requested Torque Signal Circuit Malfunction.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Faulty Powertrain Control Module (PCM), EBCM harness is open or shorted.
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 1,013

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 C1277 Pontiac Description

The Electronic Brake Control Module (EBCM) and the Powertrain Control Module (PCM) simultaneously control the traction control. The EBCM sends a Requested Torque message via a pulse width modulated (PWM) signal to the PCM. The duty cycle of the signal is used to determine how much engine torque the EBCM is requesting the PCM to deliver. Normal values are between 10 and 90 percent duty cycle. The signal should be at 90 percent when traction control is not active and at lower values during traction control activations. The PCM supplies the pull up voltage that the EBCM switches to ground to create the signal.

OBDII Code C1277 Pontiac - Requested Torque Signal Circuit Malfunction - AutoCodes.com — C1277 Pontiac Code - Requested Torque Signal Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C1277 Pontiac?

Faulty Electronic Brake Control Module (EBCM)
Faulty Powertrain Control Module (PCM)
EBCM harness is open or shorted
EBCM circuit poor electrical connection

How to Fix the DTC C1277 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 C1277 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.

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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 C1277 Pontiac Code

1. What are the common symptoms of OBDII code C1277 in a Pontiac?

The common symptoms of OBDII code C1277 in a Pontiac include issues with the vehicle's traction control system, ABS system, and potentially a warning light illuminating on the dashboard.

2. What can cause the OBDII code C1277 in a Pontiac?

The OBDII code C1277 in a Pontiac is typically caused by a malfunction in the Requested Torque Signal Circuit, often due to wiring issues, faulty sensors, or a problem with the ABS module.

3. How serious is the OBDII code C1277 in a Pontiac?

While the OBDII code C1277 in a Pontiac may not cause immediate safety concerns, it can affect the proper operation of the vehicle's traction control system and ABS system, potentially compromising driving stability in certain situations.

4. Can I continue driving my Pontiac with the OBDII code C1277?

It is not recommended to continue driving your Pontiac with the OBDII code C1277 present, as it can impact the performance of important safety systems like traction control and ABS. It is best to address the issue promptly.

5. How do I diagnose and repair the OBDII code C1277 in my Pontiac?

Diagnosing and repairing the OBDII code C1277 in a Pontiac typically involves using a diagnostic scanner to retrieve the specific fault codes, inspecting the Requested Torque Signal Circuit for faults, checking sensor connections, and potentially replacing faulty components.

6. Can a DIY enthusiast fix the OBDII code C1277 in a Pontiac?

While some DIY enthusiasts may have the skills to diagnose and repair the OBDII code C1277 in a Pontiac, it is recommended to have a professional mechanic with experience in automotive electronics handle the repair to ensure proper diagnosis and resolution.

7. How much does it cost to repair the OBDII code C1277 in a Pontiac?

The cost to repair the OBDII code C1277 in a Pontiac can vary depending on the underlying cause of the issue, the extent of the repair needed, and labor rates in your area. It is advisable to obtain quotes from local mechanics for an accurate estimate.

8. Will resetting the OBDII code C1277 in my Pontiac make it go away permanently?

Resetting the OBDII code C1277 in your Pontiac may temporarily clear the fault code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the problem.

9. Is the OBDII code C1277 specific to Pontiac vehicles only?

While the OBDII code C1277 may be commonly associated with Pontiac vehicles due to the Requested Torque Signal Circuit malfunction, it can potentially occur in other vehicle makes and models with similar ABS and traction control systems.

10. Can the OBDII code C1277 in a Pontiac cause other problems if left unresolved?

If left unresolved, the OBDII code C1277 in a Pontiac can potentially lead to further issues with the vehicle's traction control and ABS systems, impacting overall driving safety and stability. It is important to address the problem promptly.