Rpm gauge not working normally?

I have a 2004 Ford Freestyle and I noticed today my RPM gauge has been acting funny. When I turn the car on, rather sitting just above 0 it is sitting at one. When I start to accelerate it would normally go up to a 2 but instead it is going to almost 3. It is an older car with 150k miles on it. I'm not car savy in any way but I want to know what could possibly cause this and if it will be an expensive fix or not.

I don't consider an '04 "older" and 150k isn't much these days. One of my cars is approaching 300k but that's neither here nor there.

Expensive? I don't know. More information is needed and further testing must be done to make a definitive determination. If the engine RPMs follow the tachometer then yes, that's is an effective fix. That's slippage in the transmission and it means a transmission rebuild or replacement. We're talking thousands. If it is just the tachometer and the engine does not follow it, then it is most likely a sensor so should not be expensive.

Adjust your throttle body cable, that's the biggest cause of high rpm's. And if the cable is messed up, replace it, they aren't really expensive at all

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