AutoCodes – Acura – P0563 Acura

P0563 Acura Code - Powertrain Control Module Power Source Circuit Unexpected Voltage

Quick Answer

If there is a short to ground in the harness between the Powertrain Control Module (PCM) and main relay, the main relay stays ON even if the vehicle is turned to the OFF (LOCK) mode, and the PCM remains active. Common causes include Faulty Powertrain Control Module (PCM) Main Relay, PCM Main Relay harness is open or shorted, PCM Main Relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0563 Acura indicates Powertrain Control Module Power Source Circuit Unexpected Voltage.
Common causes: Common causes include Faulty Powertrain Control Module (PCM) Main Relay, PCM Main Relay harness is open or shorted, PCM Main Relay circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,156

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Dec 26, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0563 Acura Description

If there is a short to ground in the harness between the Powertrain Control Module (PCM) and main relay, the main relay stays ON even if the vehicle is turned to the OFF (LOCK) mode, and the PCM remains active. However, the engine is not running because power for the gauges, the ignition, and the fuel pump is turned OFF by the power switch. When the PCM operates for a set time after the vehicle is turned to the OFF (LOCK) mode, it detects a malfunction and stores a Diagnostic Trouble Code (DTC). The DTC will be set when the PCM operates for at least 5 seconds after the vehicle is turned to the OFF (LOCK) mode.

OBDII Code P0563 Acura - Powertrain Control Module Power Source Circuit Unexpected Voltage - AutoCodes.com — P0563 Acura Code - Powertrain Control Module Power Source Circuit Unexpected Voltage

What does this mean?

What are the Possible Causes of the DTC P0563 Acura?

Faulty Powertrain Control Module (PCM) Main Relay
PCM Main Relay harness is open or shorted
PCM Main Relay circuit poor electrical connection
Faulty PCM

How to Fix the DTC P0563 Acura?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0563 Acura code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.