Q: In park, the engine just keeps revving.

asked by on

Car is usually dead the alarm goes off for no reason and kills the battery then after new spark plugs oil change air filter and serpentine belt the car all of a sudden just starts reving by itself when its in park and also when i push on the gas it wont go past 2k rpms when it gets over idling by itself it idles good but i can revv past 2k pem when i drive it revvs consistantly to 500 to 2000 rpms and im basically jerking back and fourth what is my problem.

My car has 226820 miles.
My car has an automatic transmission.

Hello and thank you for contacting YourMechanic. There is an issue with the security system. The security is active and needs to be disabled. If the security is active, then the engine will act out and have a low rpm outcome. This prevents anyone from driving the vehicle fast for when it is stolen.

To manually reset the security, remove the battery’s negative and positive posts for 12 minutes. Then reconnect the posts and put the key in the door and manually unlock and lock the vehicle 3 times. This will reset the system. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from YourMechanic, to assist you with your vehicle.

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. In park, the engine just keeps revving.

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: Q: How does the vehicle security system work?

When the vehicle security system is armed, it will activate if a door is unlocked in any way other than with a standard key, Intelligent Key, request switch, or key fob. When the system is activated, the horn will honk...

Q: I have a 2012 Mercedes blutec and when I push start didn't want to come on but the radio and lights... What is the problem?

Hi there. The ignition system could be locked out by the security system or the ignition switch has failed. Look at the security light and see if the light is flashing quickly and see if the light stays on when...

Q: Car shakes in par and when put in reverse

Hi. The concern you are describing for your 1999 BMW 318i sounds like that of a worn engine or transmission mount. The transmission and engine mounts have rubber bushings inside of them which dampen the engine vibrations. The mounts are...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.