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DTC - Diagnostic Trouble Codes information

P0561

Powertrain Codes

P0561 - KIA - System Voltage Unstable

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light) - Slow engine start - Low battery power

Possible Causes

- Loose or missing alternator drive belt - Faulty alternator - Battery defective - Open or short system voltage circuit

When Detected

The P0561 code is detected when there is an open in ECM back-up power source circuit

Tech Notes

Start by recharging or replacing the battery.

Description

The battery supplies electricity to the ECM even when the ignition switch is OFF. This electricity allows the ECM to store data such as DTC history, freeze frame data, fuel trim values and other data. If the battery voltage falls below a minimum level, the ECM will conclude that there is a fault in the power supply circuit. The next time the engine starts, the ECM will turn on the MIL and a DTC will be set.