AutoCodes – Generic – B15C2

B15C2 Code - Speed Signal Malfunction

Quick Answer

The Navigation Receiver Assembly receives a vehicle speed signal from the Combination Meter Assembly and information from the navigation antenna and then adjusts the vehicle position. Common causes include Faulty Combination Meter Assembly, Combination Meter Assembly harness is open or shorted, Combination Meter Assembly circuit poor electrical connection. 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: B15C2 indicates Speed Signal Malfunction.
Common causes: Common causes include Faulty Combination Meter Assembly, Combination Meter Assembly harness is open or shorted, Combination Meter Assembly circuit poor electrical connection.
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 3,416

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 Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B15C2 Description

The Navigation Receiver Assembly receives a vehicle speed signal from the Combination Meter Assembly and information from the navigation antenna and then adjusts the vehicle position. The Navigation Receiver Assembly stores this Diagnostic Trouble Code (DTC) when the difference between the speed information that the navigation antenna receives, and the SPD pulse received from the Combination Meter Assembly becomes large.

OBDII Code B15C2 - Speed Signal Malfunction - AutoCodes.com — B15C2 Code - Speed Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC B15C2?

Faulty Combination Meter Assembly
Combination Meter Assembly harness is open or shorted
Combination Meter Assembly circuit poor electrical connection
Faulty Navigation Receiver Assembly

How to Fix the DTC B15C2?

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 B15C2 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.

Need more information about the B15C2 code?

Need more information on how to fix the B15C2 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B15C2 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B15C2 Lexus — Speed Signal Malfunction
B15C2 Scion — Speed Signal Malfunction
B15C2 Toyota — Speed Signal Malfunction

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 B15C2 Code

1. What are common symptoms of OBDII code B15C2 (Speed Signal Malfunction)?

- Common symptoms include erratic speedometer readings, cruise control issues, and possible limp mode activation.

2. What are the possible causes of OBDII code B15C2?

- The code B15C2 can be triggered by a faulty vehicle speed sensor, damaged wiring or connectors, or issues with the speedometer circuit.

3. How can I diagnose the Speed Signal Malfunction related to OBDII code B15C2?

- Diagnosing this issue involves checking the vehicle speed sensor, inspecting the wiring and connectors for damage, and testing the speedometer circuit for any faults.

4. Can a loose or damaged speed sensor connector cause OBDII code B15C2 to appear?

- Yes, a loose or damaged speed sensor connector can disrupt the speed signal and trigger the B15C2 code.

5. What is the typical repair process for OBDII code B15C2?

- The repair process usually involves fixing or replacing the faulty vehicle speed sensor, repairing any damaged wiring or connectors, and clearing the trouble code.

6. Is it safe to continue driving with OBDII code B15C2 present?

- It is generally not recommended to drive with the B15C2 code present, as it can affect the vehicle's speed-related functions and lead to potential safety issues.

7. Can a simple reset of the vehicle's computer clear OBDII code B15C2?

- A simple reset may temporarily clear the code, but if the underlying issue causing the Speed Signal Malfunction is not addressed, the code is likely to reappear.

8. How important is it to address OBDII code B15C2 promptly?

- It is important to address the B15C2 code promptly to ensure proper speedometer function, cruise control operation, and overall vehicle performance.

9. Are there any DIY repair tips for resolving OBDII code B15C2?

- DIY repair tips may include checking and cleaning speed sensor connectors, inspecting wiring for damage, and ensuring proper installation of a new speed sensor if needed.

10. Can extreme weather conditions affect the Speed Signal Malfunction associated with OBDII code B15C2?

- Yes, extreme weather conditions such as extreme heat or cold can potentially impact the performance of the vehicle speed sensor and contribute to triggering the B15C2 code.