HO2S Bank 1 Sensor 1 Slow Response
2015-2021 Kia Sedona 3.3L V6
Description
The PCM has detected that the upstream heated oxygen sensor on Bank 1 is switching between rich and lean too slowly. The sensor response time exceeds the maximum allowable threshold for accurate fuel control.
Symptoms
- Check Engine Light
- Poor fuel economy
- Failed emissions test
- Slightly rough idle
Common Causes
- Aging O2 sensor with degraded response time
- O2 sensor contaminated with silicone or coolant
- Exhaust leak near sensor
- O2 sensor heater circuit issue
- Wiring causing signal delay
Diagnostic Steps
- Monitor O2 sensor switching rate on scan tool at steady 2500 RPM
- Compare response time to specification
- Check O2 sensor heater circuit operation
- Inspect for exhaust leaks near sensor
- Check sensor wiring for high resistance
Repair Notes
Replace the upstream O2 sensor on Bank 1 if the response time exceeds specification.
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
P1134 on Other Vehicles
Common Questions
What does code P1134 mean on a 2015-2021 Kia Sedona?
P1134 stands for "HO2S Bank 1 Sensor 1 Slow Response". The PCM has detected that the upstream heated oxygen sensor on Bank 1 is switching between rich and lean too slowly. The sensor response time exceeds the maximum allowable threshold for accurate fuel control.
What are the symptoms of P1134 on a Kia Sedona?
Common symptoms of P1134 include: Check Engine Light, Poor fuel economy, Failed emissions test, Slightly rough idle.
What causes P1134 on a 2015-2021 Kia Sedona?
Common causes of P1134 include: Aging O2 sensor with degraded response time, O2 sensor contaminated with silicone or coolant, Exhaust leak near sensor, O2 sensor heater circuit issue, Wiring causing signal delay.