What does code P1491 mean on Honda vehicles?
The ECU detects insufficient lift of the EGR valve during operation.
OBD-II Code Honda
P1491 — Honda — EGR Valve Lift Insufficient Detected
The ECU detects insufficient lift of the EGR valve during operation.
Common symptoms
- Loss of power
- increased emissions
Possible causes
- Dirty or sticking EGR valve
- carbon buildup
Initial recommendation
Clean EGR valve or replace if insufficient lift persists.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
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