TorqueMech Beta
TorqueMech OBD Code Guide

P0604 - Control Module Random Access Memory (RAM) Error

The ECM detected an internal RAM fault.

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Code Overview

The ECM detected an internal RAM fault.

Common Causes

  • Control module, relay, sensor, or actuator fault
  • Damaged wiring or connector
  • Calibration or power-supply issue

Diagnostic Steps

  1. Inspect related connectors, power feeds, and grounds
  2. Check supporting scan data and companion codes
  3. Confirm the control circuit before replacing the module or actuator

Likely Repairs & Cost Guides

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Related OBD Codes

Browse nearby codes when systems overlap.

P0603
ECM Keep Alive Memory Error
Open code guide →
P0605
Internal Control Module Read Only Memory (ROM) Error
Open code guide →
P0602
Control Module Programming Error
Open code guide →
P0606
ECM/PCM Processor
Open code guide →
P0601
ECM Memory Check Sum Error
Open code guide →

Next Steps

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