Q: Brakes: vacuum pump relay failire

asked by on

Hello, I purchased a new 2016 vw jetta and the check engine light came on w subsequent brake/vacuum pump relay failed at just under 400 miles. It was replaced under warranty.

6 months kater at 4850 miles, again, check engine light comes on & I had to be towed from VT to MA to vw dealer . Dealer says "software update, prrformed diagnostics, retrieved code p0556. Found TSB for software update. Charged battery and performed Road test. Operating normal at this time"

From my knowledge these two events signify a major Safety issue (brakes) failure at both 400 and 4850 miles.

It's still practically a brand new car & should have zero issues. 1 Should I be concerned for my safety? 2 as the brake assist is attached to the engine, will the loss of vacuum affect the engine life/performance? 3 is this car basically a lemon (especially if this happens again)

Thank you for your time & knowledge!

My car has 4850 miles.
My car has a manual transmission.

It sounds like your problems are isolated to the Brake Assist System which is a system designed to sense panic stop conditions and use vacuum to assist the brake pedal and give you the shortest possible stopping distance. Like the ABS system or vehicle stability control, they go into "limp home" mode when there is a problem, leaving the car in driveable condition, but without the assistance of those particular systems. . It’s just sort of like driving a car built in the 1970’s. The failure of the vacuum assist should not affect the engine. I can’t speak for the safety record of your new car, but recalls and software updates have become standard operating procedure for automobile manufacturers and like your home computer, sometimes the updates solve the problem, and sometimes they lead to more problems. I can only recommend that you try to stay informed as to the latest recalls and updates as they come down the line and have them performed as soon as possible. You should be on the dealer’s mailing list for these updates and recalls. If you continue to be completely frustrated with your new car, Years ago some states passed a "lemon law" that said if you had to bring your new car back to the dealer three times for the same problem, you were entitled to a replacement. I don’t know if those laws are still in effect, but it might be worth doing the research.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Brakes: vacuum pump relay failire

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 went backwards when I had it in drive.

This is a known issue in the Volkswagon Jetta transmission. Converter drain back is a situation where the automatic transmission fluid drains back into the transmission pan causing this kind of a reaction. Some of this is normal, but not...

Q: I replaced my serpentine belt on a 2013 chevy sonic. But it must be rubbing on something because it scraped the inside edge

The first thing to do is verify that you have the correct belt (part number) installed. If the belt is the correct one specified for your vehicle, the principal cause of what you describe are pulleys and/or rotating elements (harmonic...

Q: 2016 Honda Accord service B1 -36

Hello - according to Honda, the "A-36" msg indicates your vehicle needs transmission fluid replacement (3) and differential fluid replacement (6). It is safe to drive your vehicle until this service appointment.

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.