Skip the auto shop - Our mechanics make house calls

Q: "Alarm system needs service" message appears on engine startup

asked by on

Occasionally, a message "alarm system needs service" appears when I startup the engine, causing the electronics such as sunroof to stop working. They told me at the dealership that I need siren module replacement. Do you have any advice?

It’s true that the siren module often fails and causes problems with the sunroof, among other things. The siren module communicates with the upper electronic module (UEM) to determine when the alarm should be sounded.

The Siren module does just what its name implies; if it’s the acoustic source for the alarm function. The siren module has an internal battery that goes bad over time and corrodes the module’s circuit board. There are other parts of the alarm system that could also cause the problem you are having, but the siren module is a very common failure. I would believe the dealer. If you’d like a second opinion, the team at YourMechanic offers expert diagnosis and repair.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. "Alarm system needs service" message appears on engine startup

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: Water leak

If the leak is water, it could be the windshield washer reservoir leaking. However, if the leak is coolant, that could be due to a leak in the radiator if the radiator was hit. Generally, engine coolant leaks occur due...

Q: Replaced alternator new, replaced fuel pump new, filter new, relay and regulator and it still will not start? Why?

If the car starts when you use a starting fluid as you say, then it's clear your engine is not getting fuel. Fuel pressure is of course important, and is easy to test with the right equipment. I Know you...

Q: Car won't drive over 35 mph

Hi there! Judging by the symptoms, it sounds like the issue may stem from either air metering and fuel delivery, or a badly stretched throttle cable: Over time, the cable that connects the throttle cable to the throttle body...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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.