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Engine-Codes – Scion – B2274 Scion

B2274 Scion Code - ACC Monitor Malfunction

Quick Answer

The B2274 diagnostic trouble code for Scion vehicles indicates an ACC (Adaptive Cruise Control) monitor malfunction. Common causes include Faulty sensors that detect the distance to the vehicle ahead, Wiring issues that disrupt the communication between the components of the ACC system, Malfunctioning control module that controls the adaptive cruise control system. 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
B2274 Scion indicates ACC Monitor Malfunction.
Common causes
Common causes include Faulty sensors that detect the distance to the vehicle ahead, Wiring issues that disrupt the communication between the components of the ACC system, Malfunctioning control module that controls the adaptive cruise control system.
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 11, 2024
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Code B2274 Scion Description

The B2274 diagnostic trouble code for Scion vehicles indicates an ACC (Adaptive Cruise Control) monitor malfunction. Adaptive Cruise Control is a feature that automatically adjusts the vehicle's speed to maintain a safe following distance from the vehicle ahead. When this system malfunctions, it can impact the vehicle's performance and safety features.

OBDII Code B2274 Scion - ACC Monitor Malfunction
B2274 Scion Code - ACC Monitor Malfunction

Common Causes of B2274 Scion

  1. Faulty sensors that detect the distance to the vehicle ahead.
  2. Wiring issues that disrupt the communication between the components of the ACC system.
  3. Malfunctioning control module that controls the adaptive cruise control system.
  4. Software glitches or bugs affecting the ACC system.
  5. Physical damage to the sensors or wiring of the ACC system.

Symptoms of B2274 Scion

  1. Inaccurate or erratic speed adjustments by the adaptive cruise control system.
  2. Warning lights related to the ACC system appearing on the dashboard.
  3. Loss of other safety features that rely on the ACC system, such as collision warning systems.
  4. The vehicle may exhibit unusual behavior when attempting to engage the cruise control feature.

How to Fix B2274 Scion

  1. Diagnose the specific cause of the ACC monitor malfunction using a diagnostic scanner to retrieve the trouble codes and perform additional testing if necessary.
  2. Inspect the sensors, wiring, and control module of the ACC system for any signs of damage or malfunction.
  3. Repair or replace any faulty sensors, wiring, or components identified during the diagnostic process.
  4. Clear the trouble codes from the vehicle's system and perform a test drive to ensure that the ACC system is functioning properly.
  5. If the issue persists, further troubleshooting may be necessary to identify and address any underlying issues with the ACC system.

Cost to Fix B2274 Scion

The typical repair costs for addressing the ACC monitor malfunction in a Scion vehicle can range from $200 to $600, depending on the specific cause of the issue and the necessary repairs. This estimate includes the cost of parts and labor. However, it is important to note that the actual cost can vary based on factors such as the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. It is advisable to consult with a trusted auto repair shop for a more accurate cost estimate based on the specific circumstances of the vehicle and the issue at hand.

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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 B2274 Scion Code

1. What does the OBDII code B2274 mean on a Scion?

B2274 indicates an "ACC Monitor Malfunction," which is related to the accessory (ACC) power circuit not functioning as expected.

2. What are the common symptoms of code B2274 on a Scion?

Symptoms may include issues with accessory power (e.g., radio or interior electronics not working), possible warning lights on the dashboard, and intermittent power failures.

3. What causes the B2274 code to appear on a Scion?

Common causes include a faulty ignition switch, damaged ACC circuit wiring, a blown fuse, or a malfunctioning control module.

4. Can a loose connection cause the B2274 code?

Yes, loose or corroded wiring connections in the ACC circuit can trigger the B2274 code.

5. How do I diagnose the B2274 code on a Scion?

Start by checking the ACC fuse, inspecting the ignition switch and related wiring for damage, and testing the circuit for continuity with a multimeter.

6. Can I still drive my Scion with the B2274 code active?

While the car may still be drivable, accessory systems may not work properly, and ignoring the issue could lead to further electrical problems.

7. How do I fix the B2274 code on my Scion?

Repairs may include replacing a blown ACC fuse, repairing or replacing damaged wiring, or replacing a faulty ignition switch.

8. Is the B2274 code specific to Scion vehicles?

While B2274 may appear in other vehicles, it is often specific to Toyota and Scion models with similar electrical systems.

9. Can clearing the B2274 code fix the problem?

Clearing the code may temporarily reset the system, but the underlying issue must be addressed to prevent it from returning.

10. How much does it cost to repair the B2274 code on a Scion?

Repair costs depend on the root cause, ranging from a simple fuse replacement (under $20) to ignition switch replacement or wiring repairs, which may cost $100-$300 or more.

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