Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P0563
DTC P0563:Â Powertrain Control Module (PCM) Power Source Circuit Unexpected Voltage
General DescriptionÂ
If there is a short to ground in the harness between the powertrain control module (PCM) and PGM-FI main relay 1, PGM-FI main relay 1 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 ignition 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 DTC.
Monitor Execution, Sequence, Duration, DTC Type, OBD StatusÂ
| Execution | Continuous |
| Sequence | None |
| Duration | 5 seconds or more |
| DTC Type | Two drive cycles, MIL off |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
Enable ConditionsÂ
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [BATTERY] (FI MAIN RLY OUT terminal of PCM) | 10.0 V | - |
[ ]: HDS Parameter
Malfunction ThresholdÂ
The PCM operates for at least 5 seconds after the vehicle is turned to the OFF (LOCK) mode.
Possible CauseÂ
NOTE:Â The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- PGM-FI main relay 1 stuck on failure
- PGM-FI main relay 1 FI MAIN RLY CL- line short to ground
- PCM internal circuit failure
Diagnosis DetailsÂ
Conditions for setting the DTCÂ
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, a Confirmed DTC and the freeze data are stored. The MIL does not come on.
Conditions for clearing the DTCÂ
The Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.