Q: Power module malfunction warning, engine unresponsive

asked by on

I've recently purchased this used car and I'm having many problems with it. It wouldn't crank at all. The engine lost power. The dashboard shows lights blinking and there is a power module malfunction warning. Is the engine going out?

Hello there. This is not an uncommon fault with a BMW 745Li. With any complex electrical system, the first thing to do is the perform a load test on the battery, as proper voltage is important for how the entire system works. Other possible faults include the alternator, battery cable, MAF, oxygen sensor or a wiring issue. Have a qualified technician, such as one from YourMechanic, diagnose the loss of power and perform any repairs required.

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. Power module malfunction warning, engine unresponsive

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: I have a 2002 bmw 745i and im experiencing What vibration on the rear passenger

Common causes of the vibration you are describing include wheel bearing faults, wheel/tire assembly imbalance, and defective tires. Other, less common possibilities include suspension faults (strut/shock failure) and even exhaust system faults. Certain tire defects, particularly internal belt damage or...

Q: 2002 Jeep Wrangler engine cranks and takes a while to start, a few times refused to start, replaced spark plugs coils wires etc

I would recommend having the fuel pressure tester to determine if the fuel system is contributing to the issues you are experiencing. It is possible that the fuel pump could be getting weak not allowing enough fuel flow to the...

Q: My engine light is on, has increased emissions and reduced power, and car also shakes

Hello, thanks for writing in. The coolant temperature code can be due to low coolant or a failure in the thermostat. Most of the time this is a thermostat issue. As for the misfire problem, it is common for one...

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...