Skip the auto shop - Our mechanics make house calls

Q: Power steering loss

asked by on

My car loses its power steering when driving at very low speed. It happens when I'm parking or doing a U turn from a standing still. The steering is fine during normal driving. It doesn't have any fluid leaks, and I have replaced the power steering pump and the O ring seal for the fluid reservoir. I've bled the system a few times. Do you know why this is happening and what I can do to fix it? Thanks.

Hi there, thanks for writing in about your 2001 Mercedes Benz ML430. This problem could be caused by a slipping belt or a faulty belt tensioner. The power steering pulley needs to be observed while the car is parked and in idle to see if its operation is notchy and not smooth. Notchy operation would mean the belt is slipping either from age or lack of sufficient tension produced by the tensioner. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and expertise to diagnose and repair the power steering issue so that the correct repairs and adjustments are made.

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

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. Power steering loss

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: Power steering belt broke & need to replace it. How do I replace it?

Typically, you would loosen the mounting bolts for the power steering pump and adjust the angle of the pump until the belt is loose enough to remove. There may be one or more belts for other accessories in front of...

Q: Why is my steering wheel hard to turn and my EPS light on in my 2004 Mazda RX-8

Hi there. This is a common issue on your vehicle. Most of the time this is caused by a problem with the steering angle sensor. The sensor stops reading properly which causes the steering to act like this. There are...

Q: Valve guide seals 2006 BMW 750i

Hello - unfortunately, this is not a service YourMechanic.com can offer at this time. Thanks for thinking of us though!

Related articles

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...
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...