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2011 LINCOLN MKX
3.7L V6•AWD•AUTOMATIC•gas
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor957Torque6412Fluid16DTC2254Battery2Maintenance0Recalls3
P1605moderate severityPowertrain

PCM Keep Alive Memory Test Failure

on 2011 Lincoln MKX 3.7L V6 · AWD

What this code means

The PCM Keep Alive Memory self-test has failed. The PCM cannot properly store or retrieve adaptive learning values from its KAM.

Symptoms

  • Check Engine Light
  • PCM defaults to base calibration
  • Rough idle initially
  • Harsh transmission shifts

Common causes

  • KAM circuit voltage issue
  • Faulty KAM fuse or relay
  • PCM internal failure
  • Battery cable issue

Diagnostic steps

  1. Check KAM fuse and relay
  2. Test KAM circuit voltage at PCM connector
  3. Check battery and alternator
  4. Clear code and retest — if recurring, suspect PCM failure

Repair notes

Check KAM circuit power supply. Replace fuse if blown. If KAM circuit is OK, PCM may need replacement.

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