Electric Load Detector Circuit High Signal (Honda)
What does P1298 mean?
The P1298 code means the vehicle's onboard diagnostic system has detected: Electric Load Detector Circuit High Signal (Honda). This is a low severity code.
Common Symptoms
- Check Engine Light on
- Idle speed slightly higher than normal
- Headlights may dim at idle
- Charging system not adjusting properly
- Slight fuel economy decrease
Probable Causes (Ranked by Likelihood)
- Failed electric load detector (ELD) sensor Very High
- Corroded connector at ELD sensor in fuse box High
- Damaged wiring to ELD sensor Moderate
- Alternator output issue Moderate
- PCM fault Low
Step-by-Step Diagnostic Procedure
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Locate the ELD sensor in the under-hood fuse box
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Check the ELD connector for corrosion -- this is a very common cause
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Measure the ELD signal voltage with a multimeter
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Inspect the wiring between the ELD sensor and PCM
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Test the alternator output to ensure it is charging correctly
Frequently Asked Questions
Can I drive with code P1298?
Yes. This code affects the idle speed control and charging regulation but does not prevent normal driving. The engine may idle slightly higher than normal.
What is the electric load detector?
The ELD is a Honda-specific sensor located in the fuse box that measures electrical load on the vehicle. The PCM uses this data to adjust idle speed and alternator output based on electrical demand.
Is P1298 expensive to fix?
No. The ELD sensor is usually inexpensive ($20 to $80) and located in the fuse box for easy replacement. Often, simply cleaning the corroded connector resolves the issue.