Q: Which sensors are most important for monitoring and improving the engine’s performance?

asked by on

Which sensors are most important for monitoring and improving the engine’s performance?

The way modern electronic engine control systems are designed, all of the sensors are important but some are more crucial to the vehicle than others. For example, if the engine electronic control unit (ECU) loses the input from the coolant temperature sensor, the engine will probably keep running, although not optimally. The car’s Malfunction Indicator Light (Check Engine Light or Service Engine Soon Light) will come on letting you know there’s something related to the engine controls that needs attention. On the other hand, if the crankshaft position sensor fails, the engine won’t run because the ECU absolutely needs its input to know when to fire the spark plugs and fuel injectors. Modifying individual sensors to improve fuel mileage or get a little power boost without detrimentally affecting emissions and/or drivability is very difficult outside an engineering/laboratory setting.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Which sensors are most important for monitoring and improving the engine’s performance?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Doesn't rev past 4k revs

You may have a mass airflow sensor that is contaminated or not working correctly. The sensor can get contaminated by dirt, debris, and oil from aftermarket oil-type air filers. You can try and clean the sensor and use a standard...

Q: Engine dies when I take my foot off gas pedal.

Hello. If the engine runs fine when you are holding the accelerator pedal down and dies when you release it then you may have a couple of possible issues. I would first check the vacuum hoses going to the engine....

Q: Car independently drops from 70 mph to 5 mph

Hello. Unfortunately a permanent solution will be hard to reach because Land Rover continuously has problems with this particular make of transmission. In fact many Freelander owners have filed a class action lawsuit against Land Rover for such failures. In...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.