Electric Turbocharger/E-Compressor Motor Fault
2012-2019 Fiat 500 1.4L I4
Description
The electric turbocharger or electric compressor motor has an electrical fault. E-turbos eliminate turbo lag by using an electric motor to spool the compressor.
Symptoms
- Check Engine Light
- Turbo lag returns (no electric assist)
- Reduced low-RPM torque
- 48V system warning may accompany
- E-compressor noise absent
- Slower throttle response
Common Causes
- E-compressor motor winding failure
- Inverter circuit fault
- 48V power supply insufficient
- Motor bearing failure
- Overtemperature shutdown
Diagnostic Steps
- Read e-compressor fault codes
- Check 48V supply to e-compressor
- Test motor phase resistance
- Monitor motor temperature
- Command e-compressor operation via scan tool
Repair Notes
Replace e-compressor motor or inverter assembly. Check 48V system health. These are typically found on 48V mild hybrid systems.
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
P3031 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Fiat 500L
2014-2020 1.4L I4 Turbo
Fiat 500X
2016-2024 1.4L I4 Turbo
Fiat Argo
2017-2025 1.0L I4 Flex Firefly
Common Questions
What does code P3031 mean on a 2012-2019 Fiat 500?
P3031 stands for "Electric Turbocharger/E-Compressor Motor Fault". The electric turbocharger or electric compressor motor has an electrical fault. E-turbos eliminate turbo lag by using an electric motor to spool the compressor.
What are the symptoms of P3031 on a Fiat 500?
Common symptoms of P3031 include: Check Engine Light, Turbo lag returns (no electric assist), Reduced low-RPM torque, 48V system warning may accompany, E-compressor noise absent, Slower throttle response.
What causes P3031 on a 2012-2019 Fiat 500?
Common causes of P3031 include: E-compressor motor winding failure, Inverter circuit fault, 48V power supply insufficient, Motor bearing failure, Overtemperature shutdown.