System Voltage Low
The HINO-P0562 (Hino) diesel fault code means: System Voltage Low. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- 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
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.
Frequently Asked Questions
What does Hino code P0562 mean?
Hino diagnostic trouble code P0562 (System Voltage Low) 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 P0562?
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 P0562?
Typical 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.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0562 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: