Possible causes

– Low battery charge
– Battery defective
– Loose or missing alternator drive belt
– Faulty alternator
– Open or short system voltage circuit

Tech notes

Start by recharging or replacing the battery.

When is the code detected?

The Powertrain Control Module (PCM) has detected that the electrical system voltage level is too low.

Symptoms

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

P0562 PONTIAC Description

The Powertrain Control Module (PCM) continuously monitors the system voltage. The system voltage information is taken from the PCM’s ignition feed circuits. Voltages below 8.0 volts or above 17.1 volts causes improper system operation and/or component damage. If the system voltage is low the PCM raises the idle speed in order to increase the generator output. The PCM disables most outputs to protect the hardware if the system voltage is high. A scan tool may not display data if system voltage is outside this range.