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why does my BMW 5 Series F10/F11 (2010-2017) engine light keep coming back - BMW 5 Series
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why does my BMW 5 Series F10/F11 (2010-2017) engine light keep coming back

BMW 5 Series F10/F11 (2010-2017)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
579 words

Problem Statement

The engine light on a BMW 5 Series F10/F11 (2010-2017) continues to illuminate despite previous attempts to address the issue, indicating an unresolved underlying problem.

Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect the battery before working on electrical systems.
  • •Allow the engine to cool before opening any components.

Symptoms

  • •Check engine light illuminated
  • •Poor fuel economy
  • •Rough idle
  • •Loss of power during acceleration
  • •Engine stalling intermittently
  • •Increased emissions detected

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •OBD-II scanner
  • •Socket set
  • •Torque wrench
  • •Fuel pressure gauge
  • •MAF cleaner

Parts Required

  • •Spark plugs
  • •Ignition coils
  • •MAF sensor (if needed)
  • •Vacuum hoses (if damaged)
  • •Fuel filter (if needed)
  • •Fuel injectors (if needed)
  • •EGR valve (if needed)

Additional Information

Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
5 items
Parts Required
7 items

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Solution
1. Preparation
  • Gather the necessary tools and parts.
  • Disconnect the battery before working on electrical systems to avoid short circuits.
  • Allow the engine to cool down if it has been running.
2. Address Faulty Components

A. Replace Spark Plugs and Ignition Coils

  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connectors.
  3. Unbolt and remove the ignition coils.
  4. Remove the old spark plugs using a spark plug socket.
  5. Install new spark plugs, ensuring they are gapped correctly (typically 0.032-0.036 inches).
  6. Reinstall ignition coils and reconnect the connectors.

B. Clean or Replace MAF Sensor

  1. Locate the MAF sensor in the intake duct.
  2. Disconnect the electrical connector and remove the sensor.
  3. Clean the sensor with MAF cleaner or replace it if damaged.
  4. Reinstall the MAF sensor and reconnect the connector.

C. Inspect and Repair Vacuum Leaks

  1. Conduct a visual inspection of all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to identify leaks while the engine is running.
  3. Replace any damaged hoses and secure all connections.
3. Address Fuel System Issues
  1. Check the fuel pressure using a fuel pressure gauge; replace the fuel filter if pressure is low.
  2. Test the fuel injectors for proper spray pattern and operation; replace any faulty injectors.
4. Repair EGR System
  1. Disconnect the EGR valve connector.
  2. Remove the EGR valve and clean it thoroughly. Replace if it is stuck or damaged.
  3. Reinstall the EGR valve and reconnect the electrical connector.