p2646
Moderate
Honda · SUVs
VTEC Oil Pressure Switch Circuit Low Voltage
Quick Answer
Error code P2646 on your Honda SUVs means: VTEC Oil Pressure Switch Circuit Low Voltage. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
RW1RW3RW5RV1CR-V EX 2024CR-V EX-L 2024CR-V Hybrid Sport 2024CR-V Hybrid Sport Touring 2024CR-V Hybrid Sport-L 2024CR-V LX 2024CR-V Sport 2024CR-V Sport Touring 2024HR-V EX-L 2024HR-V LX 2024HR-V Sport 2024Passport EX-L 2024Passport Sport 2024Passport Touring 2024Passport TrailSport 2024Pilot EX 2024Pilot EX-L 2024Pilot Elite 2024Pilot LX 2024Pilot Touring 2024Pilot TrailSport 2024YG7YA7ZD1RZ1
Likely Causes
How to Fix It
1
Check engine oil level and condition; change oil and filter if overdue or degraded
2
Remove and clean the VTEC solenoid filter/screen for debris or sludge buildup
3
Test the VTEC oil pressure switch by measuring voltage at the connector; it should switch from low to high when VTEC engages
4
Inspect the oil pressure switch wiring for shorts to ground, chafing, or damaged insulation
5
Replace the VTEC oil pressure switch if it does not toggle properly under oil pressure
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
VTEC oil pressure switch
VTEC solenoid filter/screen
VTEC solenoid gasket
Engine oil and filter
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