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

asked by on November 17, 2015

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

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

I have a 2014 dodge journey the lighting bolt symbol came on in the dash while driving an now it doesn't wanna go like it's hung i

You may have a transmission sensor or mechanical issue in the transmission and will need to have the computer scanned for codes that will point to the problem.

How Are Diesel and Gasoline Engines Different?

There are two main differences between gasoline and diesel engines. Gasoline engines use gasoline for fuel and spark ignition to ignite the fuel. Diesel engines use diesel fuel and compression for ignition to ignite the fuel. There are also many...

Engine problems.

Hello. From what you describe it would appear likely that the backfiring and performance issues are a result of the fuel problem. A rich fuel mixture can be caused by a wide variety of issues. A few things I would...

Related articles

P0330 OBD-II Trouble Code: Knock Sensor 2 Circuit Malfunction (Bank 2)
P0330 code definition P0330 is a general OBD-II trouble code that is indicating a malfunction in the knock sensor circuit 2. Note:...
P0223 OBD-II Trouble Code: Throttle/pedal position switch/sensor B circuit high output
P0223 P0223 code definition Throttle/Pedal Position Sensor/Switch B Circuit High Input What the P0222 code means The P0222 code is an indication that the Engine Control Module (ECM) has detected voltage from the throttle position sensor to have exceeded the...
P0442 OBD-II Trouble Code: Evaporative Emission Control System Leak Detected (Small Leak)
P0442 code definition P0442 is a diagnostic trouble code (DTC) that is seen when a evaporative emission control system malfunction is present....