Q: Car has been reving in park/idle at around 1000-3000 rpms

asked by on

For about 3 days or so the car has been reving in idle/park at about 1500-3000 rpms. Even on a side road i was going about 70 and the car usually stays at a constant rpm when driving for a bit but then it started reving even going at 70 for about 20 mins. I got my uncle to check the error code since the check engine light was on but when he checked it no reving was happening to my surprise and he seemed to get the code PO 123 then cleared the code and was fine. After him leaving 5 minute later i get in and low and behold it starts reving again. Oh yea also it stalled while in drive at a stopped red light twice now.

My car has 333000 miles.
My car has an automatic transmission.

Code P0123 relates to the throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position on the gas pedal. Based upon the inputs from the sensor reading your foot’s position on the pedal, the ECU then makes the direction to supply more or less fuel to the motor. When this sensor is not working properly, this can cause intermittent responses when pressing the gas pedal. I would suggest having a professional from Your Mechanic come to you home to diagnose your vehicle’s running condition.

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. Car has been reving in park/idle at around 1000-3000 rpms

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: Car engine keeps shaking then it shuts off. Did I ruin it by accidentally putting too much oil in?

It certainly is possible that some engine damage was done. With the oil level reading an inch or more above the full line, it's a safe guess that you were running at least 2 quarts overfilled. Considering the engine holds...

Q: When carrying a load, van rough idles and loses power - 2001 GMC Savana 3500

Hello. There may be an issue with your fuel injectors. If the fuel injectors are clogged, this will not usually throw a Check Engine Light code but will prevent the engine from running properly. If a fuel filter becomes overfilled...

Q: Hill Start Assist feature is activating on my car

The anti-lock brake (ABS) module receives input from various sensors to determine when your vehicle is stopped on a hill. It then uses this information to apply the brakes and hold the vehicle. One of the main inputs is the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...