P1602high severityPowertrain
ECM Power Source Circuit Malfunction
on 2019 Toyota RAV4 2.5L I4 · AWD
What this code means
The ECM has detected a fault in its power supply circuit. Low or lost power can cause stalling, no-start, or lost adaptive memory.
Symptoms
- Engine stalls or won't start
- Lost adaptive settings
- Check engine light on
Common causes
- Weak or failing battery
- Corroded or loose battery terminals
- Faulty ECM power circuit wiring
- Blown fuse or bad relay
Diagnostic steps
- Test battery and charging voltage
- Inspect ECM power and ground circuits
- Check related fuses and relays
- Repair wiring or replace ECM
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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