Engine-Codes - BMW - P0604 BMW

P0604 BMW Code - ECM Self Check Fault

- Code Popularity: 30,395 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
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What are the Possible Causes of the DTC P0604 BMW?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Loose or poor battery terminal connection
  • Low battery charge
  • ECM power supply circuit is open or shorted
  • ECM Programing
  • Faulty ECM

Code Tech Notes

Check the ECM/PCM fuse, if fuse is OK try erasing the code first and if the code comes back you may have to reprogram or replaced the ECM.

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How to Fix the DTC P0604 BMW?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0604 BMW code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

When is the Code Detected?

Indicates the ECM has experienced an internal memory fault.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine may not start

What Does the P0604 BMW Code Mean?

The ECM continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light.

P0604 BMW Code - ECM Self Check Fault

Need more Information on the Code?

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