What does code P1491 mean on Isuzu vehicles?
The ECU detects insufficient lift of the EGR valve during operation.
OBD-II Code Isuzu
P1491 — Isuzu — EGR Valve Lift Insufficient Detected
The ECU detects insufficient lift of the EGR valve during operation.
Common symptoms
- Poor engine performance
Possible causes
- Fouled or restricted EGR valve
Initial recommendation
Clean EGR valve and passages to restore proper lift.
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
Use the app to combine Isuzu code P1491 with your vehicle's actual symptoms for more complete diagnostic guidance.
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