Implausible Vehicle Speed Signal Received: What Does It Mean?

SMART CAR, ABS LIGHT, brake switch/pressure sensor implausible signal
SMART CAR, ABS LIGHT, brake switch/pressure sensor implausible signal from


As technology continues to advance, vehicles are becoming more sophisticated. However, with these advancements come new challenges. One such challenge is the occurrence of an “implausible vehicle speed signal received” error message. In this article, we will explore what this error message means, its potential causes, and possible solutions.

Understanding the Error Message

When a vehicle’s onboard computer detects an implausible vehicle speed signal, it means that the speed reading it is receiving is not within the expected range. This can lead to various issues, including incorrect speedometer readings, cruise control malfunctions, and even engine performance problems.

Possible Causes

1. Faulty Wheel Speed Sensor

One of the most common causes of an implausible vehicle speed signal is a faulty wheel speed sensor. This sensor measures the rotational speed of the vehicle’s wheels and relays this information to the onboard computer. If the sensor is malfunctioning, it can send incorrect speed signals, triggering the error message.

2. Wiring Issues

Another potential cause is wiring problems. Damaged or loose wires connecting the wheel speed sensor to the onboard computer can disrupt the signal transmission, leading to erroneous readings. Rust, corrosion, or electrical shorts are common culprits in such cases.

3. ABS System Malfunction

The Anti-lock Braking System (ABS) plays a crucial role in determining the vehicle’s speed. If the ABS system is malfunctioning, it can interfere with the speed signal readings, triggering the error message. Issues with the ABS module or the hydraulic unit can contribute to this problem.

Diagnosing and Resolving the Issue

When faced with an implausible vehicle speed signal error, it is essential to diagnose the root cause accurately. This often requires the expertise of a qualified mechanic or technician with access to diagnostic tools. They can perform tests to identify the faulty component or wiring issue causing the error message.

If a faulty wheel speed sensor is determined to be the cause, it will need to be replaced. Similarly, wiring issues will require repairs or replacements. In the case of ABS system malfunctions, the problematic components may need to be repaired or the entire system may require replacement.


An “implausible vehicle speed signal received” error message can be a frustrating issue to encounter. However, with proper diagnosis and timely repairs, it can be resolved effectively. If you experience this error, it is recommended to consult a professional to ensure accurate diagnosis and appropriate solutions. By addressing the underlying cause, you can restore your vehicle’s performance and ensure a safe driving experience.