What lights come on with a bad speed sensor?
As a car owner, understanding the various warning lights on your dashboard can save you from costly repairs and ensure your vehicle runs smoothly. One critical component that can trigger warning lights is the speed sensor. In this article, we will explore the symptoms of a failing speed sensor and the specific dashboard lights that may illuminate as a result.
Understanding the Speed Sensor
The speed sensor is an essential part of your vehicle's transmission system. It monitors the speed of the vehicle and sends this information to the engine control unit (ECU). A malfunctioning speed sensor can lead to various issues, including inaccurate speed readings and problems with the transmission.
Dashboard Lights Indicating a Bad Speed Sensor
When the speed sensor fails, several warning lights may appear on your dashboard. Here are the most common ones:
- Check Engine Light: This light can illuminate for various reasons, including a faulty speed sensor. It indicates that the ECU has detected an issue that needs attention.
- ABS Light: The Anti-lock Braking System (ABS) relies on the speed sensor to function correctly. If the sensor is malfunctioning, the ABS light may turn on, indicating a potential issue with your braking system.
- Transmission Warning Light: If your vehicle has a dedicated transmission warning light, it may activate if the speed sensor is not providing accurate data, leading to transmission problems.
- Traction Control Light: The traction control system uses speed data to maintain stability. A faulty speed sensor can cause this light to illuminate, indicating that the system is not functioning properly.
Symptoms of a Bad Speed Sensor
In addition to warning lights, there are several symptoms that may indicate a failing speed sensor:
- Inaccurate speedometer readings
- Unusual shifting patterns in automatic transmissions
- Engine stalling or hesitation during acceleration
- Decreased fuel efficiency
Conclusion
If you notice any of the warning lights mentioned above or experience symptoms associated with a bad speed sensor, it is crucial to have your vehicle inspected by a professional. Ignoring these signs can lead to more severe issues down the line. At Kevin's Autos, we are here to help you diagnose and resolve any auto service needs you may have.
Frequently Asked Questions
How do I reset my speed control sensor?
Reset Speed Sensor
- Remove the battery.
- Flip the battery upside down and reinstall.
- Leave battery installed upside down for 3 seconds.
- Remove the battery and reinstall correctly. *
- Make sure the rubber o-ring is back in place and put the battery cover back on.
Will ABS light come on if speed sensor is bad?
Your ABS warning light is a small yellow or orange light on your dashboard. Along with other indicator lights in your vehicle, you'll notice it flash briefly whenever you start your car. However, if the speed sensors in your ABS are faulty, they'll most likely stay on until you replace your speed sensors.
Will a bad speed sensor throw a code?
Its proper functioning depends on the data from the transmission speed sensors. If it fails to work, then it means the sensors have malfunctioned. The PCM will transmit an error code to ECU, which will shut down. If that happens, it would be better to contact your mechanic immediately to have your vehicle checked.
Is there a difference between a vehicle speed sensor and a transmission speed sensor?
the different names suggests that one is used to calculate the vehicles speed, and the other is used to help control the gearbox and ensure it is in the correct gear. On some vehicles they will be one in the same, the reading is used to both calculate the vehicles speed and control the gear-box.
How do I know if my speed sensor is bad?
5 Common Bad Speed Sensor Symptoms
- Transmission problems.
- Erratic speedometer readings.
- Inability to engage cruise control.
- Lack of torque converter clutch application.
- Check Engine Light is triggered.
- An internal electrical fault in the speed sensor.
- Damage on the sensor itself.
- Poor vehicle maintenance.
What sensor causes traction control light to come on?
1. Faulty Wheel Speed Sensors. One of the most common reasons for ABS and traction control lights to come on is a faulty wheel speed sensor.
What happens when a transmission sensor goes bad?
A failing transmission position sensor may no longer send the right signals to the Powertrain Control Module, or PCM. Without signals from the position sensor, the PCM will no longer know when to shift the transmission's gears out of park into a moving gear. Transmission shifts into the wrong gear.
Is it OK to drive with a broken speed sensor?
While you can still drive your vehicle even if your wheel speed sensor isn't working, it isn't a good idea to do so. The ABS is an important safety feature in your vehicle, and it can't function if your wheel speed sensors aren't working.
Can a bad ABS sensor cause traction control light?
When the abs system finds a fault it illuminates the abs light. The traction control system is entirely dependent on the abs system so with one of it's components not working the traction control light will always come on with it.
How do I reset my speed sensor?
Reset Speed Sensor
- Remove the battery.
- Flip the battery upside down and reinstall.
- Leave battery installed upside down for 3 seconds.
- Remove the battery and reinstall correctly. *
- Make sure the rubber o-ring is back in place and put the battery cover back on.
