SEAT Mii 2023 2.0 TDI diesel OBD Codes
On a 2023 SEAT Mii 2.0 TDI diesel, OBD fault codes often involve airflow control, boost pressure, EGR operation, fuel delivery, glow system behaviour and emissions hardware that is more common on diesel vehicles.
These pages separate petrol, diesel, hybrid and EV-style diagnostic search intent so the content does not look identical across every variant.
P0017
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B
P0335
Crankshaft Position Sensor A Circuit Malfunction
P0340
Camshaft Position Sensor Circuit Malfunction
P0341
Camshaft Position Sensor Circuit Range / Performance
P0420
Catalyst System Efficiency Below Threshold (Bank 1)
P0430
Catalyst System Efficiency Below Threshold (Bank 2)
P0442
Evaporative Emission Control System leak Detected (small leak)
P0455
System Gross Leak Evaporative Emission
P0456
Evaporative Emissions System Small Leak Detected
P0446
Evaporative Emission Control System Vent Control Circuit Malfunction
P0401
Exhaust Gas Recirculation Flow Insufficient Detected
P0403
Exhaust Gas Recirculation Circuit Malfunction
Common problem themes for this powertrain
- • EGR and intake contamination-related faults
- • boost pressure and airflow control issues
- • diesel fuel delivery and injector balance problems
- • diesel emissions system warnings and sensor faults