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: When I have my foot on the gas the truck shakes.

Hi there. Check the air filter and make sure that its not plugged up. A plugged air filter will cause the engine to not breathe correctly and make the engine shake on acceleration. Also check the mass air flow sensor...

Q: Q: Engine not cranking.

The starter may be defective or the ignition switch may be the issue. The system would need to be checked by a qualified mechanic to trace the problem down.

Q: How to fix or replace damaged vapor hose

I would recommend going to the dealer to get a parts diagram to pinpoint the hose that is damaged. There is more than one hose on the fuel tank for the vapor recovery system and getting the correct one can...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.