Hello
2005 off road Pathfinder
In The beginning-
I had the “VDC off “ and “Slip“ lights come on every time I pressed the pedal down pas a certain point. This was even in park. I had a spongy pedal as well. I took it to a shop I trust and they pulled a c1142 code- ABS pressure switch. They bled the brakes and got air out of the back two brakes but not the front. Everything looked good. No lights and the pedal felt great. Thought it was fixed. Later when checked code, 1142 came back. They believe air was getting back into the system. They could not find any leaks. They think maybe air might be coming in on the low pressure side of the master brake cylinder. My fluid level has not changed. There are no noticeable leaks and my brake booster is working ok.

Now and Question.
Is there any where air can come into my brake system without leaking any oil? I did check for bulletins but I did not see anything. Any Ideas or comments?
I appreciate your time. Thank you.
Brian

bdaviskar wrote:Is there any where air can come into my brake system without leaking any oil? I did check for bulletins but I did not see anything. Any Ideas or comments?
I appreciate your time. Thank you.
Brian

Only way air can get in is through the brake fluid resevoir cap... without leaking.

Thank you for reply

When I went to check cap I realized the the fluid level was Higher than when I last saw it. cap was tight. Before it was below the Max line and now it is over. Can air do this? My brakes are spongy agian. How can this much air get in with out me losing fluid?

bdaviskar wrote:Thank you for reply

When I went to check cap I realized the the fluid level was Higher than when I last saw it. cap was tight. Before it was below the Max line and now it is over. Can air do this? My brakes are spongy agian. How can this much air get in with out me losing fluid?

sounds like a faulty cylinder. Get a new master cylinder.