U0563 — Invalid Data Received From Audio Amplifier "B"

Will U0563 clear itself?

Sometimes U0563 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What does OBD2 code U0563 mean?

U0563 — Invalid Data Received From Audio Amplifier "B". A fault in the vehicle network (CAN bus) communication. Short, gentle driving to a shop is usually possible. Typical causes: aftermarket equipment interfering with the bus, water ingress in harness junctions, a faulty module pulling the bus down.

What is the most common cause of U0563?

The most common causes are: aftermarket equipment interfering with the bus, water ingress in harness junctions, a faulty module pulling the bus down.

What are the symptoms of U0563?

Drivers most often notice: multiple warning lights on at once, intermittent loss of functions (gauges, windows, steering assist), random, hard-to-reproduce electrical glitches, no-start or intermittent starting in some cases.

How much does it cost to fix U0563?

Remove interfering aftermarket device — $0–$150; Replace the faulty control module — $300–$1,500; Repair CAN wiring or connectors — $100–$400. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

What does U0563 mean?

When U0563 appears on a scan, it means the control module has flagged a problem in the vehicle network (CAN bus) communication: invalid data received from audio amplifier "B". The fault sits in the vehicle network group of the OBD2 standard.

This code does not appear from a single bad reading: the module must see the fault condition repeat under defined operating conditions before it turns on the warning light. The freeze frame captured with U0563 — engine load, rpm, temperature, speed — tells you exactly when the problem occurs, so reproduce those conditions when testing.

Common symptoms of U0563

• multiple warning lights on at once
• intermittent loss of functions (gauges, windows, steering assist)
• random, hard-to-reproduce electrical glitches
• no-start or intermittent starting in some cases
• modules intermittently not communicating with the scanner

What causes U0563?

• corroded connectors, especially in wet areas
• poor grounds or low battery voltage
• a faulty module pulling the bus down
• damaged CAN bus wiring or short to power/ground
• water ingress in harness junctions

How to diagnose U0563

1. Connect an OBD2 scanner, confirm U0563 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many U0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
3. Visually inspect the wiring harness and connectors related to the vehicle network (CAN bus) communication for damage, corrosion, chafing or poor contact.
4. Measure resistance between CAN-High and CAN-Low at the OBD port with power off — about 60 Ω is healthy.
5. Scan all modules: the one that does not respond is either the culprit or downstream of the break.
6. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm U0563 does not return.

How to fix U0563

Start with the cheapest and most common causes before replacing expensive parts:

• Remove interfering aftermarket device — $0–$150
• Replace the faulty control module — $300–$1,500
• Repair CAN wiring or connectors — $100–$400

How much does it cost to fix U0563?

Repair cost depends on which component actually failed. Typical scenarios for U0563 (parts and labor, USD, independent shop rates):

• Remove interfering aftermarket device: $0–$150
• Replace the faulty control module: $300–$1,500
• Repair CAN wiring or connectors: $100–$400

Overall, fixing U0563 usually costs between $0 and $1,500. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with U0563?

Depends on what is affected. A single dead convenience module is fine to drive with; loss of communication with engine, braking or steering modules is not. If multiple critical systems drop out, do not drive.

Related OBD2 codes

• U0500: U0500 - Invalid Data Received From Active Safety Control Module 63
• U0501: Invalid Data Received From "Door Control Module B"
• U0502: Invalid Data Received From "Door Control Module C"
• U0503: Invalid Data Received From "Door Control Module D"
• U0504: Invalid Data Received From "Door Control Module E"
• U0505: Invalid Data Received From "Door Control Module F"