Can a check engine light be a bad speed sensor?
But if you have malfunctioning cruise control and a Check Engine light coming on, this is a clear indication of a faulty speed sensor. After all, the engine control unit depends on having valid speed information regarding the engine’s crankshaft.
What does the Check Engine light come on?
Check Engine Light comes on The transmission speed sensors are used to calculate the actual gear ratio of the transmission while in use. There are generally two speed sensors that work in conjunction to provide accurate data to the vehicle’s onboard computer. The first transmission speed sensor is known as the Input Shaft Speed (ISS) sensor.
How can I test a new speed sensor?
If no scan tool is at hand there are a couple of tests we can do. First find a resistance value for a new sensor, and check for proper resistance across the sensor terminals. Perform wiring tests as outlined in our Automotive Circuit Testingarticle and check connectors for corrosion or poor connections.
Where does the speed sensor on a car come from?
The engine speed sensor takes data from crankshaft position sensor that give information for the engine spin speed. Vehicle speed data comes from the speed sensor which is located on the wheels and sends information regarding wheel spin speed.
Check Engine Light comes on The transmission speed sensors are used to calculate the actual gear ratio of the transmission while in use. There are generally two speed sensors that work in conjunction to provide accurate data to the vehicle’s onboard computer. The first transmission speed sensor is known as the Input Shaft Speed (ISS) sensor.
What should I do if my speed sensor fails?
If the desired gear and the actual gear do not match, then the PCM will set a diagnostic trouble code (DTC) and illuminate the Check Engine Light or Malfunction Indicator Lamp (MIL). Should either or both of these speed sensors fail, you may notice one or more of the following issues. 1. Harsh or improper shifting
How does the speed sensor on a car work?
Your vehicle’s engine speed sensor, or vehicle speed sensor as it is also known, sends information to your car’s computer about how fast the car’s engine is spinning at any particular moment. The sensor does this by recording how fast the crankshaft of your vehicle is spinning.
What happens when the transmission speed sensor is lost?
If the signals are lost from the transmission speed sensors, the PCM will set a DTC and illuminate the Check Engine Light on the vehicle dashboard. It also can indicate an increase in tailpipe emissions surpassing acceptable limits for environmental contaminants from motor vehicles.