P1225low severityPowertrain
Intake Manifold Air Control Solenoid Malfunction
on 2002 Mercedes-Benz SL 3.0L I6 · RWD
What this code means
The ECU detected a malfunction in the intake manifold runner control solenoid. This solenoid controls variable-length intake runners to optimize torque across the RPM range.
Symptoms
- Check Engine Light
- Reduced mid-range torque
- Slight hesitation on acceleration
Common causes
- Faulty intake runner control solenoid
- Vacuum leak at solenoid actuator
- Broken or stuck intake runner flaps
- Wiring issue to solenoid
Diagnostic steps
- Test solenoid operation with scan tool
- Inspect vacuum lines to runner actuator
- Visually inspect intake runner flaps
- Test solenoid resistance
- Check wiring
Repair notes
Replace the intake manifold runner control solenoid or repair vacuum lines.
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