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ElectricalCritical⚠️ Professional Recommended

P0605

Internal Control Module Read Only Memory Error

The ECM's ROM has failed an internal self-test.

SeverityCritical
CategoryElectrical
Est. Repair Cost$300-$1200
Code TypePowertrain
DIY RepairProfessional

⚡ Common Causes

⚠️ Symptoms

✅ How to Fix — Step by Step

  • Step 1:Attempt ECM reflash
  • Step 2:Replace ECM if reflash fails
💡 Pro Tip: Like P0601, this can sometimes be resolved with a full reflash before resorting to ECM replacement.

Repair Cost Estimate

Full Repair Estimate
$300-$1200
DIY Possible?
PRO
Severity
Critical

Frequently Asked Questions

What does OBD2 code P0605 mean?+
P0605 stands for Internal Control Module Read Only Memory Error. The ECM's ROM has failed an internal self-test.
What causes code P0605?+
Corrupted software; ECM hardware fault; Failed programming attempt
How do I fix code P0605?+
Attempt ECM reflash; Replace ECM if reflash fails
How much does it cost to fix P0605?+
Estimated repair cost for P0605 is $300-$1200.
Is P0605 DIY-friendly?+
P0605 typically requires professional equipment and a qualified mechanic.

AI Diagnosis

Related Codes

P0606PCM Processor Fault
Critical
P0601Internal Control Module Memory Check Sum Error
Critical
P0602Control Module Programming Error
Critical
P0603Internal Control Module Keep Alive Memory Error
Critical
P0604Internal Control Module Random Access Memory Error
Critical
P0607Control Module Performance
Critical