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Engine-Codes – Generic – B0977

B0977 Code - Start Indicator Control Circuit

Quick Answer

The B0977 diagnostic trouble code (DTC) refers to a malfunction in the start indicator control circuit of a vehicle. Common causes include Faulty start indicator control module, Wiring issues or shorts in the start indicator circuit, Defective start indicator light bulb. 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
B0977 indicates Start Indicator Control Circuit.
Common causes
Common causes include Faulty start indicator control module, Wiring issues or shorts in the start indicator circuit, Defective start indicator light bulb.
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 Sep 14, 2024
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Code B0977 Description

The B0977 diagnostic trouble code (DTC) refers to a malfunction in the start indicator control circuit of a vehicle. This code indicates that there is an issue with the circuit responsible for controlling the start indicator light on the dashboard. The start indicator light is crucial as it informs the driver when the vehicle's engine is ready to be started. When this circuit malfunctions, it can lead to confusion for the driver and potentially prevent the vehicle from starting properly.

OBDII Code B0977 - Start Indicator Control Circuit
B0977 Code - Start Indicator Control Circuit

Common Causes of B0977

  1. Faulty start indicator control module
  2. Wiring issues or shorts in the start indicator circuit
  3. Defective start indicator light bulb
  4. Corrosion or poor connections in the circuit
  5. Issues with the ignition switch

Symptoms of B0977

  1. Start indicator light not illuminating
  2. Intermittent flickering of the start indicator light
  3. Inability to start the vehicle
  4. Dashboard warning light related to start indicator system

How to Fix B0977

  1. Diagnose the start indicator control circuit using a multimeter to test for continuity and voltage.
  2. Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Check the start indicator control module for proper functioning and replace if faulty.
  4. Test the start indicator light bulb and replace if necessary.
  5. Clear the DTC and test the start indicator system to ensure proper operation.

Cost to Fix B0977

The cost of repairing a B0977 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts for this repair may range from $50 to $200, while labor costs can add another $80 to $150 per hour. Keep in mind that additional diagnostic time may be needed to pinpoint the exact cause of the problem. It's recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on your vehicle's make and model.

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Code B0977 Information for Specific Makes

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 B0977 Code

1. What are the common symptoms of OBDII code B0977 (Start Indicator Control Circuit)?

The common symptoms of OBDII code B0977 include a non-functioning start indicator light on the dashboard or erratic behavior of the start indicator light.

2. What are the possible causes of OBDII code B0977?

Possible causes of OBDII code B0977 include a faulty start indicator control circuit, damaged wiring or connectors related to the start indicator system, or a malfunctioning start indicator light bulb.

3. How can I diagnose OBDII code B0977?

To diagnose OBDII code B0977, you can start by visually inspecting the wiring and connectors related to the start indicator system. Using a multimeter, test the continuity of the circuit and check if the start indicator light bulb is functioning properly.

4. Can OBDII code B0977 be repaired at home?

Depending on your level of automotive expertise, you may be able to repair OBDII code B0977 at home by replacing a faulty start indicator light bulb, repairing damaged wiring, or fixing loose connectors. However, if the issue lies deeper within the circuit, professional help may be required.

5. Is it safe to continue driving with OBDII code B0977 present?

While OBDII code B0977 may not directly affect the drivability of the vehicle, it is important to address the issue promptly to ensure that the start indicator system functions correctly. Ignoring the code could lead to potential inconvenience or confusion during driving.

6. Can a disconnected battery reset OBDII code B0977?

Disconnecting the battery may temporarily clear the code, but if the underlying issue causing OBDII code B0977 is not resolved, the code is likely to reappear once the start indicator system is used again.

7. How much does it typically cost to repair OBDII code B0977 at a mechanic or dealership?

The cost of repairing OBDII code B0977 can vary depending on the exact cause of the issue and the labor rates of the mechanic or dealership. It is advisable to obtain quotes from different service providers to compare prices.

8. Are there any recalls or technical service bulletins related to OBDII code B0977?

It is recommended to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code B0977. This information may provide insights into common issues and potential solutions.

9. Can extreme weather conditions affect OBDII code B0977?

Extreme weather conditions, such as excessive heat or moisture, can potentially damage the wiring or connectors related to the start indicator control circuit, leading to OBDII code B0977. It is important to keep the vehicle protected and maintained in such conditions.

10. Does OBDII code B0977 impact vehicle performance or safety?

OBDII code B0977 primarily affects the functionality of the start indicator system and does not directly impact the overall performance or safety of the vehicle. However, ensuring all vehicle systems are in proper working order is crucial for a safe and reliable driving experience.

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