P0563 OBD-II Trouble Code: System Voltage High

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0563 code

P0563 is a diagnostic trouble code (DTC) for "System Voltage High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0563 DIAGNOSTIC Get a fair and transparent estimate upfront

P0563 code definition

This code is also known as System Voltage High, or in some makes of vehicles, Battery System High.

What the P0563 code means

The ECM (engine control module) receives power from the battery even when the vehicle is turned off. This permits data storage and other essential functions.

A vehicle will store this fault code when the ECM detects a voltage reading which is out of range from what is expected. The ECM assumes a power supply circuit fault and automatically triggers P0563 and often the Service Engine Soon lamp. This voltage variation could originate from the battery itself, the alternator, or other components in the starting system or the charging system.

What causes the P0563 code?

Problems that could cause the system voltage to be out of range include:

  • A faulty alternator
  • A bad battery
  • A bad starter
  • A faulty voltage regulator
  • Corrosion at the battery terminals
  • Unusual battery drain
  • A short or open in the battery cables or wiring
  • A faulty PCM (rarely)

What are the symptoms of the P0563 code?

The battery light may come on, the engine could stall while idling, automatic transmission may not function properly, the Check Engine Light may illuminate, and if left un-repaired, fuel efficiency could be affected.

How does a mechanic diagnose the P0563 code?

A qualified technician may follow these steps to identify the source of the code:

  • Use an OBD-II scanner to gather freeze frame and other data from the vehicle’s computer, followed by resetting the code to see if it returns

  • Visually inspect all wiring, cables, and connectors related to the battery, and the starting and charging systems

  • Perform a load test on the battery

  • Assess battery voltage readings using a starting/charging system tester

  • Test the starter current draw using an amp probe

  • Test the alternator circuits with an ohmmeter

  • Perform a continuity test on the system circuits

Common mistakes when diagnosing the P0563 code

It’s common for people to replace the battery first without determining whether that’s actually the source of the problem. Frequently, the alternator is the issue, so it’s vital that all systems are tested and all wiring and cables checked thoroughly. Some drivers have been told to replace their entire transmission because the vehicle may enter limp mode when storing this code. This is an extremely expensive, usually unnecessary repair in this situation.

How serious is the P0563 code?

This code can impair your vehicle’s ability to be driven, possibly putting it into limp mode or even preventing it from starting at all. Any time there is something wrong with the charging or starting system, you should have the problem assessed and repaired by a qualified technician as soon as possible.

What repairs can fix the P0563 code?

Possible repairs that may need to be performed to fix this fault code include:

Additional comments for consideration regarding the P0563 code

Once the battery or other components have been replaced, it’s critical that all codes be cleared from the vehicle’s computer. If all codes are not erased, the vehicle may still perceive an issue, even with brand new components installed.

Some vehicle makes have a potential problem with transmission fluid leaking onto a terminal near the TCM (transmission control module) which can cause a short in the circuit board. This is a particularly prominent issue in some Mercedes models. Always get a second opinion from a qualified professional before going ahead with a transmission replacement. The problem could lie in the P0563 code rather than the actual transmission.

Need help with a P0563 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P0563

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0563 code.

SCHEDULE P0563 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,395

Rating Summary
4,978
202
50
30
135
4,978
202
50
30
135

Anthony

6 years of experience
18 reviews
Anthony
6 years of experience
Jeep Grand Cherokee - Check Engine Light is on - Carmichael, California
Anthony was great! We are very happy that we chose to go with this company instead of the overpriced and slow service we get from the Jeep dealership. He was on time and did the job just as expected. He identified a couple of other things that need to be done before the problems get worse. We appreciate having a technician give us direct feedback regarding our vehicle, rather than a service advisor (salesperson) that we've had to deal with in the past at the dealership. We'll be booking the addtional services very soon and will definitely request Anthony again now that he is familiar with our vehicle!

Michael

37 years of experience
113 reviews
Michael
37 years of experience
Subaru Forester - Check Engine Light is on - Santa Fe Springs, California
Michael was punctual and courteous. He knows what he’s doing and I would absolutely recommend him to anyone.

Anthony

6 years of experience
18 reviews
Anthony
6 years of experience
BMW 740Li - Check Engine Light is on - Roseville, California
Very helpful in finding out the fault codes in my bmw 740 li. It was simple fix and that the two tube hose just had to be connected and my drive train malfunction went away. This saved me from having to go the an expensive dealership. Anthony has a good attitude about his work.

Breck

19 years of experience
613 reviews
Breck
19 years of experience
Ram 1500 - Check Engine Light is on - Houston, Texas
Breck did a great job working on my truck. Showed up on time, found any issues I had on my truck and explained everything to me so that I understood what was going on. Went above and beyond, definitely will book him for future appointments.


More related articles

P0349 OBD-II Trouble Code: Camshaft Position Sensor A Circuit Intermittent (Bank 2)
P0349 P0349 code definition Your vehicle’s PCM has found an improper wave form or voltage reading from the camshaft circuit A in engine bank 2. What the P0349 code means The camshaft position sensor works with the notches, or teeth,...
P0831 OBD-II Trouble Code: Clutch Pedal Switch "A" Circuit Low
P0831 means the PCM registered a malfunction with the CPS, often caused by its failure or misadjustment, or electrical issues like corrosion.
P0378 OBD-II Trouble Code: Timing Reference High Resolution Signal B Intermittent/Erratic Pulses
P0378 means the high resolution timing reference signal B is pulsing abnormally, indicating a faulty circuit in the system.

Related questions

I think that my car has thrown a rod - 2006 Pontiac Torrent

Hi there. If you noticed a large hole on the side of the engine's block and it's leaking a lot of oil, it is highly likely that a connecting rod snapped and "windowed" the block. Unfortunately, there is no repair...

Code p0128

Your vehicle does not have a coolant sensor and uses the cylinder head temperature sensor to do both jobs. The system uses this sensor to sense both the coolant and head temperature. If your vehicle fan is running all the...

Glow plug

Hi there. With newer diesel engines and the advanced timing systems they have, the importance of fully functional glow plugs once the motor is lit is less important. However, as the weather gets colder, starting a diesel engine with the...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com