BMW Drivetrain Malfunction Drive Moderately Problem

Vehicle:   BMW
Difficulty: ⚫⚫⚫⚪⚪
DIY Cost:
Est. Time: 15 min - 2 hr

A BMW vehicle may display Drivetrain Malfunction Drive Moderately error message on the dashboard when there is an engine or transmission problem.

This message often appears under heavy acceleration, going up on a steep incline, taking off from a stop sign, or when trying to pass another car. Drivetrain Malfunction Drive Moderately can also come up during cold weather or even under normal driving conditions.

In this guide, you will learn more about this subject and diagnose the problem with a BMW scanner

What does drivetrain malfunction mean?

BMW Drivetrain Malfunction error message means that the engine control module (also known as DDE ECU ECM or DME) has detected an engine or transmission issue.

The maximum torque output is limited by the ECU to prevent damage.

To diagnose the problem, you can use a BMW scanner, which will allow you to read the fault codes from the Digital Motor Electronics (DME) module and transmission (EGS)  module.

Symptoms

BMW Drivetrain Malfunction due to engine problem

While the symptoms can vary depending on the problem that caused the error, here are what most BMW owners usually notice:

  • Drivetrain malfunction error message on the iDrive screen
  • The car starts to shake.
  • Check engine light comes on.
  • Vehicle cuts off / dies when idling or placed in gear (D)
  • Smoke out of the exhaust
  • Vehicle idles rough
  • Transmission stuck in gear.
  • Drivetrain malfunction while trying to pass on the highway.
  • Drivetrain malfunction, and the car won't start.

In most cases, your BMW will lose power, the engine may shake or die, and transmission can go in the limp home mode (no longer changes gears). 

What should I do?

A few basic steps that one can take when the BMW Drivetrain Malfunction error message comes up. 

Restart Engine

bmw drivetrain malfunction x3
  1. Find a safe place to park your BMW.
  2. Turn off the ignition and remove the key.
  3. Wait for at least 5 minutes, then restart the car.

In many cases, this will temporarily reset BMW drivetrain malfunction and allow you to continue your journey.

Inspect Engine

bmw drivetrain malfunction x3

If restarting the engine didn't fix Drivetrain Malfunction Drive Moderately, park the vehicle safely and turn off the engine again.

Pull the hood release under the dashboard and inspect the engine for leaks and unusual smells, indicating a damaged serpentine belt, oil leak, or coolant leak. 

  • Check the engine oil level.
  • Monitor engine temperature.
  • Do not keep the engine running if it overheats or the oil light is on. 

Read Codes with a BMW Scanner

bmw drivetrain malfunction car wont start shaking reset error with scanner

Codes stored in the DME will tell you why the Drivetrain Malfunction error was triggered.

For this step, you will need a BMW Scanner. Generic OBD2 scanners won't be much help, as they can't read manufacturer fault codes.

  1. Locate diagnostic port under the dashboard. 
  2. Plugin your scanner. 
  3. Turn on the ignition but don't start the engine. 
  4. Turn on the scanner and select your BMW model. 
  5. Read codes from the engine (DME) and transmission (EGS) module. 

If the engine is shaking and there is reduced power or the vehicle is in limp mode, it is not recommended to drive. Call your dealer or mechanic. Do not ignore a drivetrain malfunction warning.

Get the BMW serviced as soon as possible. Even if the drivetrain error disappears, you should have your BMW diagnosed as there is a very high chance the problem will return.

Common Problems

An engine misfire often causes BMW drivetrain malfunction.

Most likely, your issue will be due to one of the issues below. We strongly recommend getting your BMW diagnosed by a mechanic or, at a minimum, read the fault codes yourself before you start replacing any parts.

Spark Plugs

bmw drivetrain malfunction

Worn spark plugs are often the cause of drivetrain malfunction on BMW vehicles. When you change the spark plugs, replace all of them at the same time.

Ignition Coils

Ignition Coils

A failed ignition coil can cause engine misfire and BMW error message drivetrain malfunction on iDrive.

If you are getting a cylinder misfire for one particular cylinder, there is a chance that the ignition coil to that cylinder is defective. Let's say you get cylinder 1 misfire.

Swap the ignition coils for cylinder 1 and cylinder 2. Clean the codes with an OBD-II scanner. Run the car until the check engine light comes back on. If the code is posting to cylinder 2 misfire (P0302), it indicates you have a bad ignition coil.

High-Pressure Fuel Pump

HPFP

BMW drivetrain malfunction can be caused by a fuel pump that does not generate the required fuel pressure, especially if the error message is coming up when you are accelerating.

The fuel pump may fail to create enough pressure, especially when there is a high demand from the engine.

Catalytic Convert

Catalytic Convert

A clogged catalytic converter can also cause a BMW drivetrain malfunction error message.

This is more likely to happen in high mileage vehicles where the catalytic converter starts to clog and restricts the exhaust gases.

Low-Quality Fuel or Octane Rating

Catalytic Convert

This problem can be caused if you recently filled up the car with low octane gasoline. Make sure to use premium gas on your BMW, 93 or higher octane.

If you accidentally used low octane, consider adding Octane Booster to the fuel tank to bring up the octane level of the tank's gasoline.

Fuel Injectors

One or more damaged fuel injectors can cause BMW to drive moderately reduced power.

If your mechanic determines that the fuel injectors are the problem, it is recommended (but not required) to replace all of them simultaneously.

Other possible causes of BMW drivetrain malfunction include blown head gasket, mass airflow sensor, turbo issue, fuel injectors.

While it is impossible to know what caused BMW drivetrain malfunction in your car without reading the codes, in most cases, this error is due to an engine misfire.

FAQ

Drivetrain malfunction in cold weather

If you are getting drivetrain malfunction when you first start your BMW in the morning, there is a good chance that you:

  • Have an old battery
  • Have spark plugs that weren't changed at the recommended interval
  • Have too many electronics plugged into the auxiliary outlet

Drivetrain malfunction comes up when accelerating.

If you are trying to pass another car on the highway and while you are accelerating get a Drivetrain Malfunction message, the chances are that you:

  • Have a bad high-pressure fuel pump
  • Clogged fuel filter
  • Damaged or dirty fuel injector.

Drivetrain malfunction came on after an oil change

If you get BMW drivetrain malfunction after you change the engine oil, there is a perfect chance that:

  • A sensor got unplugged by accident
  • You spilled oil on the engine

iDrive Drivetrain Malfunction Error Messages

This is a list of possible error messages that you may get. The exact wording of the message can vary between models.

  • Drivetrain Malfunction...drive slowly
  • Drivetrain malfunction maximum output not available
  • Drive moderately. Maximum drivetrain output not available. Consult service center.
  • Drivetrain malfunction drives moderately.
  • Full performance not available - Have the problem checked by service - Error message.
  • Drivetrain Malfunction Drive Moderately Maximum Drivetrain Output not available
  • Drivetrain Continue the journey at a moderate speed. Full performance not available. Have the problem checked by service.
  • Drive Modertaley Maximum drivetrain output not available. Consult service center.
By YOUCANIC Automotive Experts
Nov 2020

Comments