P0563 on Toyota Corolla E140: System Voltage High

Short answer: P0563 means “System Voltage High”. The car’s computer has found a fault in the Electrical (charging) system and turns on the Check engine light (MIL). First check: check battery terminals and earth straps for corrosion or looseness.

Standard OBD-II code Same meaning on all cars (SAE J2012). Not checked against this car’s factory manual.

Code

P0563

System

Electrical (charging)

Dashboard light

Check engine light (MIL)

Applies to

Generic OBD-II meaning. Not every code is used by this car.

Confidence

medium (generic OBD-II definition, not checked against the factory manual for this car)

Source

obd-codes.com

Symptoms and when it is set

1. Check engine light on
2. Red battery light On
3. Transmission may not shift
4. Engine may not start or if it does start, may stall out and die
5. Lower fuel economy

Likely causes

1. Potential causes for this code to set are
2. High resistance in the cable between the alternator and battery - possible
3. Low resistance/open circuit between the alternator and the control module - possible
4. Alternator faulty – most common
5. Failed PCM - unlikely

What to check, in order

1. Check battery terminals and earth straps for corrosion or looseness
2. Measure battery voltage with the engine off and running
3. Check the alternator and its belt
4. Clear the code and test-drive

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• P0563 · Toyota Passo (1st gen)
• P0563 · Toyota Corolla (11th gen, E170)
• P0563 · Honda City (5th gen, GM2)
• P0563 · Honda Civic (10th gen, FC)
• P0563 · Suzuki Wagon R (Pakistan, K10B)
• P0563 on all cars compared

← P0562 P0600 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.