Turbo Shaft Speed Sensor Circuit Malfunction
2016-2021 Mazda CX-3 2.0L I4 🇷🇺
Description
The turbo shaft speed sensor is reporting incorrect or no data. Modern turbos use this sensor to monitor compressor wheel RPM for surge protection and boost control.
Symptoms
- Check Engine Light
- Boost control reverts to open-loop
- Turbo may over-speed without protection
- Conservative boost map applied
- Reduced performance
- Turbo surge protection disabled
Common Causes
- Speed sensor failure
- Sensor wiring damage from heat
- Corroded sensor connector
- Sensor gap incorrect
- Electromagnetic interference from ignition
Diagnostic Steps
- Read turbo shaft speed PID
- Check sensor connector at turbo housing
- Test sensor signal with oscilloscope
- Verify sensor air gap
- Inspect wiring routing near ignition coils
Repair Notes
Replace turbo shaft speed sensor. Verify proper air gap to reluctor. Route wiring away from ignition components.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P3033 on Other Vehicles
Common Questions
What does code P3033 mean on a 2016-2021 Mazda CX-3?
P3033 stands for "Turbo Shaft Speed Sensor Circuit Malfunction". The turbo shaft speed sensor is reporting incorrect or no data. Modern turbos use this sensor to monitor compressor wheel RPM for surge protection and boost control.
What are the symptoms of P3033 on a Mazda CX-3?
Common symptoms of P3033 include: Check Engine Light, Boost control reverts to open-loop, Turbo may over-speed without protection, Conservative boost map applied, Reduced performance, Turbo surge protection disabled.
What causes P3033 on a 2016-2021 Mazda CX-3?
Common causes of P3033 include: Speed sensor failure, Sensor wiring damage from heat, Corroded sensor connector, Sensor gap incorrect, Electromagnetic interference from ignition.