Hyundai Tucson 2023 1.6 CRDi diesel OBD Codes
On a 2023 Hyundai Tucson 1.6 CRDi 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.
P0113
Intake Air Temperature Circuit High Input
P0118
Engine Coolant Temperature Circuit High Input
P0128
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)
P0133
O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P0135
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0300
Random / Multiple Cylinder Misfire Detected
P0301
Cylinder 1 Misfire Detected
P0302
Cylinder 2 Misfire Detected
P0303
Cylinder 3 Misfire Detected
P0304
Cylinder 4 Misfire Detected
P0351
Ignition Coil A Primary / Secondary 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