OBD-II Code · Timing
P2646
Rocker Arm Actuator System Performance (Bank 1)
medium severitySafe to drive$80-$600
VTEC/VVL oil pressure switch fault on bank 1. Very common on Honda.
Common symptoms
- CEL
- Reduced high-RPM power
- Oil pressure warning
Likely causes
- Low oil level
- Dirty oil
- Failed VTEC solenoid
- Clogged oil screen
Where to start
- Try the cheapest cause first. Start by checking: low oil level.
- Cost & scope. $80-$600
- If the code returns after the fix: escalate to a shop or scanner with live-data and freeze-frame. A code that re-sets means the underlying fault is still there.
Related codes
P0016Crankshaft/Camshaft Position CorrelationP0017Crankshaft/Camshaft Position Correlation (Bank 1 Exhaust)P0018Crankshaft/Camshaft Position Correlation (Bank 2 Sensor A)P0019Crankshaft/Camshaft Position Correlation (Bank 2 Sensor B)P0020Camshaft Position Actuator Circuit (Bank 2)P0021Camshaft Position Timing Over-Advanced (Bank 2)P0022Camshaft Position Timing Over-Retarded (Bank 1)P0023Camshaft Position Actuator Circuit (Bank 2 Exhaust)
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