System Voltage High
The HINO-P0563 (Hino) diesel fault code means: System Voltage High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- intermediate
- Estimated cost
- $250-$2,800
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Common Symptoms
- CEL with multiple codes set together
- No-start (CKP/CMP)
- Gauge/speedometer dropout
- Transmission limp or shift faults
- Scan tool communication loss
Probable Causes (Ranked by Likelihood)
- Damaged sensor or wiring in affected circuit Likely
- CAN bus harness chafing in chassis routing Possible
- Poor battery or ground — dual-battery J08 setups common Possible
- Water intrusion at cab / body harness disconnect Possible
- ECM / TCM internal fault (rare) Less Likely
Frequently Asked Questions
What does Hino code P0563 mean?
Hino diagnostic trouble code P0563 (System Voltage High) is a moderate-severity fault on Hino medium-duty diesel engines. It indicates a problem in the electrical that should be verified with a scan tool (Hino DX3 / DX4) before replacing any parts.
Can I drive my Hino truck with P0563?
Short runs may be possible but do not ignore — Hino medium-duty aftertreatment faults cascade quickly into 5-mph derate or no-restart. Schedule diagnosis immediately.
How much does it cost to fix Hino P0563?
Estimated repair cost runs $250-$2,800. Sensor, wiring, and DEF-related repairs fall at the low end; DPF service, turbo, injector, and EGR cooler work fall at the high end and may require dealer-level programming.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Inspect engine-to-frame and engine-to-body grounds for corrosion — the #1 root cause of U-codes on Hino medium-duty.
Measure battery voltage at rest and cranking. Replace weak batteries before diagnosing CAN faults.
Measure CAN H / CAN L resistance at diagnostic port — ~60 ohms key off indicates healthy dual-termination.
For CKP / CMP, ohm the sensor, inspect reluctor for damage, verify air gap with feeler gauge.
Run ECM / TCM self-diagnostic routine on Hino DX3 if wiring and power check out.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J1939-73Application Layer: Diagnostics (defines the SPN/FMI fault-identifier framework)
- SAE J2012Diagnostic Trouble Code Definitions (defines P0563 as a generic OBD-II code)
P0563 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
Commonly Affected Vehicles
- Hino 155 / 155h with J05 5.1L
- Hino 195 / 195h (hybrid) with J05D 5.1L
- Hino 258 / 258LP / 268 with J08 7.7L
- Hino 338 / 338CT with J08 7.7L
- Hino 358 / 358CT (post-2019 J-series / A09C)
- Toyota Dyna / Hino-branded export chassis with J05/J08
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