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?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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: RPM issue. Car can't produce enough power. Idles low and caps at low RPM.

Hey there, thanks for writing in about your 2001 Nissan Sentra. It sounds like you may have a throttle position sensor issue or idle air control valve issue. If the catalytic convertor was not replaced, it could also still be...

Q: Sqealing noise EPC light

Hello. It sounds like it may have a failing alternator. If the alternator is failing or if the belt is loose due to a bad belt tensioner then this will occur. I would check and see if the belt is...

Q: P2402 code, Evap system warning and the leak

This is a fault for the evaporative emissions pump control circuit. This can mean the evaporative emissions pump is faulty. The evaporative emissions pump needs to be checked for function and then the evaporative emissions system needs to be checked...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...