P1600
ECM BATT Malfunction
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$56–333 (est.)
Symptoms
- The engine stalls or runs erratically
- Difficulty starting the engine
- Check Engine Light Is On
- Loss of engine power
- Malfunctions of the car's electronic systems
Causes
- Low or faulty battery
- Problems with the generator
- Damage to the wiring harness to the ECU
- Oxidation or poor contact in ECU connectors
- Malfunction of the engine control unit itself
How to Fix
- Check battery and generator voltage
- Inspect the connectors and wiring to the ECU for damage
- Check and clean the contacts of the ECU connectors
- Check the fuses associated with the ECU power supply
- If necessary, replace the ECU