P2004moderate severityPowertrain
Intake Manifold Runner Control Stuck Open Bank 1
on 2021 Lexus ES 250 AWD 2.5L I4 · FWD
What this code means
The variable intake manifold runner flaps on bank 1 are stuck in the open position.
Symptoms
- Reduced low-RPM torque
- Check engine light
- Rough idle
- Poor fuel economy
Common causes
- Broken runner flap linkage
- Failed actuator motor
- Carbon buildup on flaps
- Vacuum leak
Diagnostic steps
- Inspect intake manifold runner mechanism
- Test actuator motor
- Check vacuum lines if applicable
Repair notes
Clean carbon deposits from runner flaps. Replace actuator motor or linkage as needed.
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