Q: What would cause the car to want to start on its own with no key in the ignition?

asked by on

i have a car that when making connection with the positive battery terminal wants to start on its own. i could be outside the vehicle keys in hand and it tries to turn over. i believe the person that owned it befor me put an aftermarket remote start. could that be the issue or is there multiple?

My car has 154000 miles.
My car has an automatic transmission.

The wires for the battery terminal on the ignition switch is swapped with the starting terminal on the ignition switch and is causing your starter to engage. This would not be caused by the original wiring only if it was tampered with or the remote starter was installed incorrectly. If you need further assistance with your engine starting with no key, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. What would cause the car to want to start on its own with no key in the ignition?

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: The brake pedal is low and hard to press, and my car does not brake well

It sounds like the brake booster is failing. The hissing sound you heard was air leaking through either a vacuum or vent valve in the brake booster itself. The valve failure prevents the booster from generating brake boost, making the...

Q: On highway, car jerks and RPMs rise sharply

When an engines rotation speed increases the speed should increase. If it isn't, then there is likely an issue with the torque converter (an automatic transmissions clutch). If the speed is increasing, it could be an issue with the cruise...

Q: Q: Car won't start

Hello. It is possible that the ignition switch is causing the truck not to start. However, there are other possibilities for this problem. An issue with the battery, fuel system, spark plugs or spark plug wires, coil packs, or distributer...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.