Skip the auto shop - Our mechanics make house calls

Q: Brakes caliper will not grab rotor

asked by on

New caliper on front left ,new pads both sides,new brake line in back across the cross member for rear. bled system i have fluid all 4 corners but the left caliper will not grab rotor only right side does I can see piston move in and out by watching the pads just no pressure on it why. thank you Russ

My car has 200000 miles.
My car has an automatic transmission.

Hello and thank you for contacting YourMechanic. Check the caliper for the piston sticking. Remove the pins (bolts that make the caliper a sliding caliper) and put some anti-seize on them and reinstall them. Recheck the brakes to see if the caliper is grabbing. If the caliper is not, then bleed just that caliper until all of any air is out. If there was no air and a solid stream of fluid, then the piston is sticking and the caliper needs to be replaced. If you need further assistance diagnosing your brake system, then seek out a professional, such as one from YourMechanic, to help you with your vehicle.

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: Car won't stay charged for some reason

Claimed by Jeff Engstrom

Q: I put my car in park and turned it off, now the shifter won't move

From the description you have provided, it would appear to be a shifter and/or shift cable problem. A bad shift interlock solenoid may be preventing the shifter from moving. It could also be that the shifter or shift cable has...

Q: All rotors warped - 2009 Kia Borrego

The braking system must be checked over a little more closely. Warped brake rotors can also be caused by malfunctioning brake calipers that are not releasing a they should. This can be caused by the caliper itself or a blockage...

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...
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 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...