Electrical Load Detector Circuit High Voltage

What it means

This is a Honda- and Acura-specific code; the same number can mean something different on other makes. The signal from the electrical load detector (ELD) in the under-hood fuse box is higher than expected or stuck at the top. The usual cause is an open wire or a failed unit, so the computer loses the load signal it uses to control alternator charging.

Models covered: Honda and Acura models, mainly 1990s–2000s.

Related codes: P1297P0620P0563P0562

Symptoms3

• Check engine light on.
• Idle dips or surges when the A/C or lights are switched on.
• The driver may notice nothing else.

Possible causes5

• Open ELD signal wire or loose connector.
• Failed electrical load detector (ELD) unit.
• Corrosion or moisture inside the fuse box.
• Signal wire shorted to a voltage source.
• Engine computer fault (rare).

How to diagnose4

1. Inspect the fuse box and connectors for corrosion or looseness.
2. Watch the ELD reading on a scan tool; a fixed value that does not change with loads points to a fault.
3. Check continuity of the signal wire between the unit and the computer.
4. Measure signal voltage at the unit with loads on and compare with the manufacturer specification.

How to fix4

1. Reseat or clean the connector.
2. Repair the open or shorted wire.
3. Replace the ELD unit, or the fuse box where the unit is built into it.
4. Clear the code and confirm the ELD reading responds to electrical loads.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

Sometimes a connector or wire repair is enough; on models where the unit is part of the fuse box, the price reaches the top of the range.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions