P0141low severityPowertrain
O2 Sensor Heater Circuit Bank 1 Sensor 2
on 2023 Mazda Mazda3 2.0L I4 · AWD
What this code means
Malfunction in the downstream O2 sensor heater circuit for Bank 1.
Symptoms
- Check Engine Light
- Failed emissions
Common causes
- Faulty sensor heater
- Blown fuse
- Wiring damage
Diagnostic steps
- Check fuse
- Test heater resistance
- Inspect wiring
Repair notes
Replace O2 sensor or repair wiring.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1