Fault code P0562 – a step-by-step guide to diagnosing and fixing it

Error code P0562 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected that the voltage in the vehicle electrical system is too low and has fallen below the prescribed minimum value. This DTC P0562 indicates problems with the alternator, the battery or the electrical system. This fault code may have slightly different threshold values for different manufacturers, but it basically signals an insufficient power supply.

What causes can this fault code have?

• Defective alternator
• Weak or defective battery
• Corroded or loose battery terminals
• Damaged cables in the charging system
• Defective voltage regulator
• Blown fuses in the charging system
• Poor ground connections
• Defective alternator V-belt

What symptoms occur in parallel with fault code P0562?

• Starting problems: The vehicle is difficult or impossible to start
• Weak lighting: Headlights and interior lighting are dimmed
• Battery light: The battery warning light in the dashboard lights up
• Electrical problems: Radio, air conditioning and other electrical consumers work unreliably
• Engine stuttering: Unsteady idling or loss of power while driving
• Complete power failure: In the worst case scenario, the vehicle stalls

How can the problem of error code P0562 be rectified?

• The repair requires a systematic check of the entire charging system.
• Test the battery and replace it completely if the voltage is low (below 12.4V) or the cells are defective
• Have the alternator checked and replace if the charging capacity is insufficient (below 13.8V with the engine running)
• Clean all battery terminals, tighten firmly and treat with terminal grease to prevent corrosion
• Check the alternator V-belt for tension and condition and replace if worn
• Check all cables in the charging system for damage and replace defective cables
• Check fuses in the engine compartment and replace blown fuses in the charging system
• Clean and tighten earth connections between the engine and bodywork