P1602
Engine Control Module Supply Voltage Low From Battery
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–167 (est.)
Symptoms
- Unstable engine operation
- Problems starting the engine
- Check Engine Light Is On
- Loss of engine power
- Malfunctions of the car's electronic systems
Causes
- Weak or dead battery
- Generator malfunction
- Damage or corrosion of wires and contacts
- Relay or fuse problems
- ECU malfunction
How to Fix
- Check battery charge and condition
- Check generator operation
- Inspect wires and contacts for damage and corrosion
- Check relays and fuses
- Diagnostics and possible replacement of the ECU