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P0604 BMW Code - ECM Self Check Fault

- Code Popularity: 30,389 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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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
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How to Fix the DTC P0604 BMW?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0604 BMW code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to 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

Code P0604 BMW Description

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.

OBDII Code P0604 BMW - ECM Self Check Fault - AutoCodes.com
P0604 BMW Code - ECM Self Check Fault

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Code P0604 BMW comments

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