Will a faulty throttle position sensor cause rough idle?
In all probability not. If you have a check engine light on then you will need to have it scanned for codes. If the code shows a component, such as the TPS, it DOES NOT mean that is defective. It only means the problem lies in that area. That is what you pay a technician to let you know. It is cheaper to know what is the problem, than to throw parts at the car.
What are the symptoms of failing throttle position sensor in Mitsubishi Mirage Car will not idle when warm.?
The possibilities can be many. It can range from a malfunctuioning fuel pump, to a bad throttle position sensor, to faulty fuel injectors. First I would check the throttle position sensor since this is the cheapest part, and also the easiest to replace. The throttle position sensor tells the computer how much air and fuel to put in the engine. If it is messed up it can cause hesitation, stalling, transmission buckoing, etc...
If it is an 3.7L or 4.7L engine it is on the throttle body mounted on the side. If it is a hemi engine there are two throttle position sensors. The throttle body is electronic. There is a position sensor mounted underneath the battery hidden behind a cover. The accelerator cable goes from the gas pedal to this sensor. This sensor sends info to the PCM (powertrain control mondule). There is also another position sensor…
The throttle position sensor (TPS) keeps the PCM informed about throttle position. The PCM uses this input to change spark timing and the fuel mixture as engine load changes. A problem here can cause a flat spot during acceleration (like a bad accelerator pump in a carburetor) as well as other drivability complaints. the throttle position sensor (tps) tells the computer where you have your foot while driving ( half throttle or quarter ect.)
Typical causes would be: -faulty throttle position sensor -faulty accelerator position sensor (if drive-by-wire) -faulty throttle body (if drive-by-wire) -restricted exhaust catalyst or other exhaust restriction -restricted fuel filter -poor fuel quality -floor mat interfering with accelerator pedal operation -overdue for tune-up (gasoline engine only)-ignition timing fault -knock sensor inoperative -false low MAF sensor reading -false MAP sensor reading -DPFE sensor or hoses bad (Ford only) -clogged air filter
A sensor has failed, and is reporting the wrong value to the transmission controller. Old transmissions: Probably the vacuum modulator or throttle position sensor. Also check the fluid level. New Transmissions: Output speed sensor, turbine speed sensor, throttle-position sensor, fluid pressure sensor, and sensors on the engine.