P0133 on 2023 Hyundai Tucson Plug-in Hybrid
On a 2023 Hyundai Tucson Plug-in Hybrid plug-in hybrid, OBD code behaviour can vary because the petrol engine may run less often, which changes how some efficiency, catalyst and readiness-related faults appear.
P0133 means o2 sensor circuit slow response (bank 1 sensor 1).
Likely causes
- • Faulty sensor
- • Damaged sensor wiring
- • Loose or corroded connector
- • Open circuit or short circuit
- • Poor electrical connection
- • Faulty oxygen sensor
Symptoms
- • Check engine light illuminated
- • Intermittent warning light
- • Inconsistent engine performance
- • Increased emissions
- • Reduced fuel efficiency
Severity
Low to Medium
Can you keep driving?
Whether you can keep driving depends on how the vehicle is behaving. If there is rough running, loss of power, overheating or stalling, diagnose it as soon as possible.
Fuel and engine specific themes
- • infrequent engine operation affecting emissions monitoring
- • engine restart and control transition-related warnings
- • sensor and catalyst efficiency faults
- • fuel and airflow-related engine fault patterns
Common fix areas
- • Test the oxygen sensor and heater circuit
- • Inspect exhaust leaks before the sensor
- • Check wiring and connectors
- • Verify live data and sensor voltage
- • Inspect sensor connector and wiring
- • Check continuity, power and ground
FAQs
What does P0133 mean on a 2023 Hyundai Tucson Plug-in Hybrid plug-in hybrid?
P0133 on a 2023 Hyundai Tucson Plug-in Hybrid plug-in hybrid indicates o2 sensor circuit slow response (bank 1 sensor 1). The exact root cause can still vary by the powertrain layout and any related stored faults.
Can P0133 behave differently on plug-in hybrid vehicles?
Yes. The same code can present differently depending on whether the vehicle is petrol, diesel, hybrid or another powertrain type, because emissions control, fuelling strategy and operating conditions are not the same.
Should I diagnose P0133 differently on this plug-in hybrid model?
You should still start with the standard fault-code process, but you should also consider fuel-type-specific systems and operating behaviour when diagnosing the cause.