What causes high RPM while I’m driving?

I’ve noticed when I’m driving on the highway that the reading on my tachometer has been going all the way up. This mainly happens when I accelerate and it’s honestly making me nervous. What could be causing the RPM to be high while I’m driving?

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Answer provided by
Kaitlin May
Answered on Feb 01, 2022
I don’t blame you for being nervous! Any number close to or beyond that red line on the tachometer is a reason to be concerned. There could be a few culprits behind the high RPM, but put simply, there’s a strain on your car’s engine.
When your engine is working harder than it should be to keep your car going, it could be due to the following reasons:
  • Transmission fluid leaks are present, preventing the system parts from being lubricated
  • There’s a faulty clutch causing your transmission to slip up when changing gears
  • The speed sensor is malfunctioning and stopping the vehicle from switching gears
  • Idle control valve damage is failing to manage the RPM
Whenever you notice that tachometer getting too close to the edge, it’s a good idea to bring your car to an experienced mechanic to diagnose the source of the problem. The sooner you know what’s causing it, the sooner you can come up with a solution.
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