Boost Pressure Control Malfunction
2012-2015 Mercedes-Benz ML 3.5L V6
Description
The ECU detected a malfunction in the turbocharger boost pressure control system. The actual boost pressure does not match the commanded value, indicating a control system failure.
Symptoms
- Check Engine Light
- Loss of power
- Reduced power mode
- Overboost or underboost condition
- Turbo surge or whistle
Common Causes
- Faulty wastegate actuator
- Boost control solenoid failure
- Vacuum line leak to wastegate
- Wastegate stuck open or closed
- Turbocharger bearing failure
Diagnostic Steps
- Monitor commanded vs actual boost pressure
- Test wastegate actuator movement
- Check boost control solenoid
- Inspect vacuum lines
- Check turbocharger shaft play
Repair Notes
Replace the faulty boost control component; inspect turbocharger for damage.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1470 on Other Vehicles
Mercedes-Benz 500SL R129
1990-2002 5.0L V8 M119
Mercedes-Benz 600SL R129
1993-2002 6.0L V12 M120
Mercedes-Benz A220 W177
2019-2024 2.0L I4 Turbo M260
Mercedes-Benz A250 W176
2013-2018 2.0L I4 Turbo M270
Mercedes-Benz A35 AMG W177
2020-2024 2.0L I4 Turbo M260
Mercedes-Benz A45 AMG W176
2014-2018 2.0L I4 Turbo M133
Mercedes-Benz A45 AMG W177
2020-2024 2.0L I4 Turbo M139
Mercedes-Benz AMG GT
2015-2024 4.0L Turbo V8
Common Questions
What does code P1470 mean on a 2012-2015 Mercedes-Benz ML?
P1470 stands for "Boost Pressure Control Malfunction". The ECU detected a malfunction in the turbocharger boost pressure control system. The actual boost pressure does not match the commanded value, indicating a control system failure.
What are the symptoms of P1470 on a Mercedes-Benz ML?
Common symptoms of P1470 include: Check Engine Light, Loss of power, Reduced power mode, Overboost or underboost condition, Turbo surge or whistle.
What causes P1470 on a 2012-2015 Mercedes-Benz ML?
Common causes of P1470 include: Faulty wastegate actuator, Boost control solenoid failure, Vacuum line leak to wastegate, Wastegate stuck open or closed, Turbocharger bearing failure.