P1656moderate severityPowertrain
OCV Circuit Malfunction
on 2006 Toyota Highlander 2.4L I4 · AWD
What this code means
The ECM detected a fault in the Oil Control Valve circuit for the VVT system.
Symptoms
- CEL
- Rough idle
- Poor performance
- Reduced power
- Engine noise
Common causes
- Faulty OCV
- Damaged wiring
- Low oil pressure
- Dirty oil
Diagnostic steps
- Test OCV resistance
- Check oil level/condition
- Inspect wiring
- Command OCV with scan tool
Repair notes
Replace OCV. Change oil if dirty.
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