Skip the auto shop - Our mechanics make house calls

Q: Knocks upon starting and won't drive.

asked by on

When I start my car it makes a knocking noise and I can't drive it. The gear stick does not shift out of park on my automatic transmission.

Your shifter has a solenoid that will not let the shifter come out of park unless your foot is firmly on the brake pedal. This is a safety feature to prevent cars from rolling away if the brake pedal is not depressed. If this solenoid, or another part of the park interlock system has failed, the shifter may not come out of park. Concerning your knocking noise I would check the level of your engine oil if you are able. Low oil can cause your engine to knock due to low oil pressure. I would ask for an inspection from a mechanic to check into both of your concerns so your vehicle will be 100 percent again.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

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: Small amout of oil leaking on the driveway

Hello. We will be happy to assist you. A few drops a day should not cause too much of a concern but you want to keep your eye on your oil level to make sure it doesn't get too low...

Q: Car won't shift

Hi there. If your Blazer is moving but just will not shift, then it is not the master cylinder. If the Blazer will not move at all then the brakes may be locked up, which can be caused by a...

Q: Starters for mazda 2001

Hi there. A manual transmission starter has a different housing and fits differently to the flywheel than an automatic transmission starter. It's always best to swap flywheel's to match the starter anytime a transmission swap is completed.

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...