Skip the auto shop - Our mechanics make house calls

Q: Engine won't start

asked by on

Hi. I own an Audi A5 2012 model. I went to turn on my car one day and the engine wouldn't start. I took it to the mechanic and he said I need to have the engine replaced. He also did a quick engine compression test but he said it failed and the engine failed to give any reading. What do you think the problem is and what is the best solution?

My car has 96000 miles.
My car has an automatic transmission.

Hi there, thanks for writing in. I’d be happy to provide my insight. This is a highly unlikely scenario in that if an engine completely failed a compression test and needed to be replaced, that there would not be any check engine lights or warnings prior to this. While there are a variety of reasons as to why the engine may not start, I would highly recommend getting a second opinion on this from a qualified mechanic, such as one from YourMechanic. Your car needs a minimum amount of compression in order to run and for all cylinders to not have this means that there would have been either 1) a catastrophic event that happened in order for them all to fail or 2) a condition would have been present prior which would have caused them to slowly begin to fail which would have triggered a check engine light and caused the engine to run erratically.

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
  1. Home
  2. Questions
  3. Engine won't start

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: Stops when check engine light is on

Hello. If your Check Engine Light is coming on after you start the engine, then the computer has detected an issue with the vehicle's engine management or emissions system. Your particular model of vehicle uses an OBD-I computer, meaning that...

Q: WHAT KIND OF MOTOR OIL DO I USE AND HOW MANY QUARTS ?

The V6-3.0L Turbo is diesel powered. If that is the vehicle that you have, the oil capacity is 6.8 quarts assuming you install a new filter and, of course, you should use a new filter. In all events, check the...

Q: Oil burning off 1 1/2 quarts every 200 miles

Hello there, thank you for asking about your 1994 Isuzu Pickup. For your vehicle, minimum compression is 114 PSI and all cylinders should read within 70% of each other. So, according to your results, compression is good. My guess is...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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.