P1600low severityPowertrain
Loss of KAM Power Circuit Open
on 2005 Mazda MPV 3.0L V6 · FWD
What this code means
The PCM has detected a loss of Keep Alive Memory power. The KAM circuit maintains battery voltage to the PCM to preserve adaptive learning values, fuel trims, and DTC history when the engine is off.
Symptoms
- Check Engine Light
- Poor idle after battery reconnect
- Transmission shifts harshly initially
- Fuel economy temporarily reduced
Common causes
- Blown KAM fuse
- Corroded battery terminal
- Wiring open in KAM circuit
- Faulty PCM power relay
- Battery cable issue
Diagnostic steps
- Check KAM fuse
- Inspect battery terminals for corrosion
- Test battery voltage
- Check wiring from battery to PCM KAM circuit
- Verify PCM power relay
Repair notes
Replace the blown KAM fuse; clean battery terminals; repair wiring in the KAM circuit.
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