P1605moderate severityPowertrain
PCM Keep Alive Memory Test Failure
on 2000 Ford Thunderbird 4.6L V8 · FWD
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
- Check KAM fuse and relay
- Test KAM circuit voltage at PCM connector
- Check battery and alternator
- 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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1