P0563 on Honda
System Voltage High
P0563 on Honda vehicles indicates system voltage high. Au7o has documented this code across 1 Honda model — most commonly on Accord. This code indicates the engine computer detected that the vehicle's system (battery) voltage is higher than the normal operating range. The PCM monitors charging system voltage, and persistently high voltage usually points to an overcharging condition. Excessive voltage can damage the battery, sensitive electronics, and lighting if left unaddressed. Typical repair costs on Honda range from $300 to $700, depending on the specific model and root cause.
Common Causes of P0563
- •Faulty voltage regulator in the alternator
- •Overcharging alternator
- •Poor ground or wiring connection at the alternator/battery
- •Faulty battery
- •Corroded battery terminals
- •PCM or charging-control module fault
P0563 on Honda by Model
Honda Accord(1 issue)
- Alternator / Charging System Failure - Battery Light and Dimming2008-2017
The alternator (or its integrated voltage regulator) commonly wears out around 100,000-150,000 miles, showing a battery/charging warning light, headlights and dash lights that dim at idle and brighten with revs, and eventually a no-start from a dead battery. On 9th-gen cars a persistent 'check charging system' light can also stem from the battery-management sensor (see the 17V-418 recall) rather than the alternator, so the charging fault must be pinpointed before parts are replaced.
Looking for P0563 on a different make?
View P0563 across all makes →Frequently Asked Questions
What does P0563 mean on Honda?▼
P0563 stands for "System Voltage High." This code indicates the engine computer detected that the vehicle's system (battery) voltage is higher than the normal operating range. The PCM monitors charging system voltage, and persistently high voltage usually points to an overcharging condition. Excessive voltage can damage the battery, sensitive electronics, and lighting if left unaddressed. On Honda specifically, this code is documented across 1 model.
What causes P0563 on Honda vehicles?▼
Common causes on Honda: Faulty voltage regulator in the alternator, Overcharging alternator, Poor ground or wiring connection at the alternator/battery, Faulty battery, Corroded battery terminals. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0563 on a Honda?▼
Repair costs on Honda range from $300 to $700, depending on the specific model and root cause.
Which Honda models have P0563 documented?▼
Au7o has documented P0563 on 1 Honda model: Accord.