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Engine-Codes – Generic – B210B

B210B Code - Starter Control Relay ON

Quick Answer

The B210B diagnostic trouble code (DTC) indicates that the starter control relay is stuck in the ON position. Common causes include Faulty starter control relay, Wiring or electrical issues in the starting system, Faulty ignition switch. 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
B210B indicates Starter Control Relay ON.
Common causes
Common causes include Faulty starter control relay, Wiring or electrical issues in the starting system, Faulty ignition switch.
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 08, 2024
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Code B210B Description

The B210B diagnostic trouble code (DTC) indicates that the starter control relay is stuck in the ON position. The starter control relay is responsible for sending power to the starter motor when the ignition key is turned. When this relay gets stuck in the ON position, it can cause the starter motor to continue running even after the engine has started, leading to potential damage to the starter motor and other components in the starting system.

OBDII Code B210B - Starter Control Relay ON
B210B Code - Starter Control Relay ON

Common Causes of B210B

  1. Faulty starter control relay.
  2. Wiring or electrical issues in the starting system.
  3. Faulty ignition switch.
  4. Corrosion or poor connections in the relay circuit.
  5. Faulty engine control module (ECM) sending incorrect signals to the relay.

Symptoms of B210B

  1. Engine cranks continuously without starting.
  2. Grinding noise when attempting to start the engine.
  3. Engine does not start at all.
  4. Starter motor continues to run even after the engine has started.

How to Fix B210B

  1. Diagnose the issue by using a scan tool to read the DTCs and checking the starter control relay for proper operation.
  2. Inspect the wiring and electrical connections in the starting system for any damage or corrosion.
  3. Test the ignition switch to ensure it is functioning correctly.
  4. Replace the faulty starter control relay if necessary.
  5. Clear the DTCs and test the vehicle to ensure the issue has been resolved.

Cost to Fix B210B

The typical repair costs for addressing a B210B code can vary depending on the specific cause of the issue. Replacement of a starter control relay can range from $50 to $150 for the part, with additional costs for labor that can total between $100 and $200. Overall, the total repair cost for this issue could range from $150 to $350. It is essential to keep in mind that labor rates and part prices can vary based on location, vehicle make and model, and other factors, so it's advisable to check with local auto repair shops for a more accurate estimate.

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Code B210B 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 B210B Code

1. What does the OBDII code B210B mean?

B210B indicates an issue with the Starter Control Relay, specifically that it is stuck in the "ON" position when it shouldn't be.

2. What are the common symptoms of the B210B code?

Symptoms may include difficulty starting the vehicle, the starter motor running continuously, or the engine cranking even after the ignition is turned off.

3. What causes the B210B code to appear?

Common causes include a faulty starter control relay, damaged wiring or connectors, a short circuit, or an issue with the ignition switch.

4. Can a bad battery cause the B210B code?

While a weak battery can cause starting issues, it is unlikely to directly trigger the B210B code. This code is typically related to relay or wiring problems.

5. How is the B210B code diagnosed?

A mechanic will inspect the starter control relay, check for wiring damage, test the relay for proper operation, and ensure the ignition circuit is functioning correctly.

6. Can I drive with the B210B code active?

Driving with this code is not recommended, as a stuck starter relay can lead to overheating of the starter motor or electrical damage.

7. How do you fix the B210B code?

Repairs may involve replacing the faulty starter control relay, fixing damaged wiring, or addressing issues with the ignition switch or related circuits.

8. How much does it cost to repair the B210B code?

The repair cost varies depending on the specific issue but typically ranges from $100 to $300, including parts and labor.

9. Can I reset the B210B code without fixing the problem?

Resetting the code without addressing the underlying issue is not recommended, as the problem will likely return and may cause further damage.

10. What happens if the B210B code is ignored?

Ignoring this code can lead to starter motor damage, electrical system failure, or a drained battery, potentially leaving you stranded.

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