Eml, dmc, brake warning lights. No start

Car was running beautiful and one day after work it would not start… After finally had started using a jump box the eml, dmc, and brake lights were on and car was in "limp" mode… still doesn't want to start and when does same issue. Had battery checked and was good other than being only78% charged. Please help

My car has 170 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
The BMW models are notable for going into "limp" mode or "safe" mode when one or more vehicle systems are not operating correctly. This is a difficult issue to diagnose without more information.

I would recommend having an expert mechanic, such as one from YourMechanic, come to your home or office to properly diagnose the no start condition, and recommend the best path to repair.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The Engine Management Light (EML) or check engine light is a warning indicator which is found on your BMW`s dashboard. It will illuminate when more severe issues are detected in your vehicle`s systems or parts which work with the engine and the connecting exhaust systems.
If you see the BMW brake light in your BMW, it`s usually not cause for worry. The problem is most likely due to an electronic issue, and not a brake pad malfunction, and it can usually be resolved by resetting the brake pad lights. That said, the brake warning light can illuminate for other reasons as well.
Brake Pad Replacement warning light

If this light comes on, it means a sensor has detected that your brake pads are too thin. This BMW warning symbol should come on before the brake pads become dangerously thin, so you have time to get them changed.

BMW E36 3 Series Engine management light or EML – Possible problem with the vehicle engine or a sensor may need replacing. Because this light has been illuminated on your dashboard, your vehicle will have stored a code which you need to retreive in order to fix the problem, or find the source of the problem.
Turn the ignition on and off to turn off EML engine warning light. An even simpler way to clear the engine management light is to turn the ignition on and off. This approach achieves the same outcome as the previous step, but without disconnecting the battery.
If your brake service warning light is always on, it could be due to a need for parking brake adjustment, worn brake pads, or hydraulic issues. If your brake service warning light turns on when you hit the pedal, it could be due to hydraulic loss on one side of your vehicle or low brake fluid in the master cylinder.
The Brake Wear Sensor on the BMW`s are a small plastic device with 2 wires at the harness end. The wire`s are connected together at the sensor end inside the plastic creating a closed circuit.
Electronic Emergency Brake Light (EEBL)

Warns the driver of a hard braking event in front, even when the driver`s view is obstructed by other vehicles or bad weather conditions. In addition, it enables a vehicle to broadcast a self-generated emergency brake event to surrounding vehicles.

EGR valve failure

The EGR valve can become stuck open or closed due to a build-up of particles, which will cause a fault, resulting in the engine management light being illuminated on the dash.

This light signals a serious fault or engine malfunction and may even cause your vehicle to break down, so it is not safe to continue driving while this light is showing.
Is it safe to drive with the engine management light on? Generally, unless there are other symptoms that`s something`s wrong, you can continue driving to your destination. You should then get your vehicle looked at by an expert as soon as possible to avoid risking further damage to your car.
The engine management light (EML) doesn`t indicate a specific fault. It could be alerting you to one or more issues, typically linked to exhaust emissions. Some are more serious than others. The light is connected to the car`s main computer, called the engine control unit (ECU).
This light signals a serious fault or engine malfunction and may even cause your vehicle to break down, so it is not safe to continue driving while this light is showing.
Faulty Oxygen Sensor

The oxygen sensor is designed to keep your car`s engine running efficiently by telling the ECU (the car`s brain) how much unburnt oxygen is leaving through the exhaust. If it`s faulty, then the car can`t operate efficiently, which in turn causes the EML to appear.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

EPC light on 2004 Jetta. Code said brake switch faulty, but brakes lights worked. Replaced brake switch, now no brake lights.
ANSWER : Hi there. The first thing that pops in my mind beyond of what you have listed is perhaps the electrical harness attached to the brake switch. Perhaps the harness itself is damaged or you have an exposed wire, loose ground wire somewhere. You might want to have a professional mobile mechanic come to your location and complete a brake lights not working inspection to help you diagnose this issue.

When I put my foot on the brake my back left brake light goes off, when I take it off the brake the brake light comes on
ANSWER : I would suggest trying to disconnect and reconnect the wiring to the rear lights. I have seen these older Toyota vehicles rear lighting short out on the lights themselves due to the way the light circuit was made on the lamp housing. Look at the housing circuit on the light to see if one is touching another, and that could tell you why it is malfunctioning. There could also be a problem with the brake light switch. If you are not comfortable dealing with wires, I recommend getting in touch with a certified mechanic who can look at your brake light issue for you to see what’s going on.

Brake lights are not working. replaced brake light swtch still no brake lights. the third brake light the connection was melted at
ANSWER : The first thing to do is to repair third brake light and replace the brake light fuse and then see if the third brake lights work and the lower lights start working? If only the 3rd brake light starts working then you may need a further checks on the turn signal flasher or switch could be bad.

No dash lights, back right tail light is out, no parking lights. Brake lights work though as does head lights.
ANSWER : Hi there. In many cases, when you have electrical problems like you’re describing, it’s caused by multiple electrical component failure. It’s likely that a few electrical relays are not working; especially if you have systems that utilize the same components (such as your brake light and tail lights). I would recommend having a professional mobile mechanic come to your location to complete an electrical problems inspection first, so they can pinpoint what is damaged and recommend the right repairs.

signals, daytime running lights are not working, park brake light on dash is on steady and chime is dinging steady 4×4 wont engage
ANSWER : This is likely a brake light switch problem. I would suggest testing the brake light switch which should be located down by the brake pedal. This may also be a computer problem as well as indicated by the other lights on in the dash. I would recommend having an expert from YourMechanic come to your home to possibly replace the brake light switch and diagnose with a scanning tool which will download useful data from the truck’s computer indicating what specifically the problem may be.

Brake sensor is to sensitive causing brakes to flicker while driving. 2005 Mercury Montego
ANSWER : Hi there – your brake light switch needs a minor adjustment. It is adjusted too "tight" or close to the brake pedal lever, or possibly has failed. Adjusting/replacing it will eliminate this flickering problem. I recommend a brake light isn’t working inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

Eml, dmc, brake warning lights. No start
ANSWER : The BMW models are notable for going into "limp" mode or "safe" mode when one or more vehicle systems are not operating correctly. This is a difficult issue to diagnose without more information.

I would recommend having an expert mechanic, such as one from YourMechanic, come to your home or office to properly diagnose the no start condition, and recommend the best path to repair.

Car shut down and will not start. Warning lights are on – 2006 Toyota Highlander
ANSWER : Hello. From what you describe, it would appear that your vehicle is having some sort of electrical issues. The "Generator Inverter Performance" warning comes on when the computer detects an issue with the vehicle’s electrical generator inverter. The generator inverter is the component that converts the high current electricity from the vehicle’s hybrid battery into a lower power form of electricity that is useable by the vehicle’s various systems.

The inverter is located in the engine bay, as the silver box on top of the engine. Unfortunately, the inverter is a critical component to the functionality of the hybrid system, and therefore to the operation of the vehicle, and, as a result, needs to be repaired or replaced before the vehicle will run again.

The VSC system warning light comes on when the computer detects an issue with the vehicle’s stability control system. This is usually due to a fault with the wheel speed sensors or the ABS module, though electrical issues can sometimes effect this system as well and cause it to behave erratically. I would start by taking care of the generator inverter issue and going from there.

I recommend having a certified mechanic, such as one from YourMechanic, perform an inspection to determine why the warning lights are on and suggest any needed repairs.