Replaced the vacuum pump last night. The old one may have an internal oil leak. My car had check engine light with code CCID-021.

 

Correction:

 

Did the CEL go away with the new pump?

I replaced mine due to external leaks. Mine had quite a bit of oil in it, did yours?

Mike

 

The light did go away, but I think it is because I found that the small vacuum line was separated from the hard line about three inches from the pump, inside the woven sheath.

My new theory is that the pump has oil inside by design since it has lots of metal to metal contact. Maybe someone with more knowledge can chime in.

I'm not sure that there was anything wrong with my pump. Check that line on your car.

 

Vacuum pumps should have some oil for lubrication, yet should not be filled completely with oil. Usually if oil has worked its way up the outer side of the vacuum pump the internal seal is leaking and the entire pump should be replaced. If oil is only running down the side of the cylinder head under the pump the O-ring used to mate pump to cylinder head needs replacing. I have also seen pumps lock-up causing the bolts to break on cam gears, very rare but has happened.

 

OK good to know, thanks. Mine was full of oil inside the pump but no external leaks at all. Glad I replaced it.

 

Glad the light went off and you determined it was a vacuum leak.