P1259moderate severityPowertrain
VTEC System Malfunction Bank 1
on 2005 Acura TSX 2.4L I4 · FWD
What this code means
VTEC oil pressure switch did not indicate proper pressure when commanded.
Symptoms
- CEL
- Loss of power above 4000 RPM
- Cannot rev past 4000
- Rough idle
- Decreased economy
Common causes
- Low oil level
- Dirty/degraded oil
- Faulty VTEC solenoid
- Clogged oil screens
Diagnostic steps
- Check oil level/condition
- Test VTEC solenoid
- Clean VTEC screen filter
- Monitor oil pressure
Repair notes
Change oil. Replace VTEC solenoid or clean screens.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1