P1163moderate severityPowertrain
HO2S Bank 1 Sensor 1 Slow Response
on 2005 Acura TSX 2.4L I4 · FWD
What this code means
The upstream O2 sensor is switching too slowly between rich and lean.
Symptoms
- CEL
- Poor fuel economy
- Increased emissions
- Rough running
Common causes
- Aging sensor
- Contaminated sensor
- Exhaust leak
- Fuel quality issue
Diagnostic steps
- Monitor switching rate
- Check for exhaust leaks
- Test sensor heater
- Compare to specs
Repair notes
Replace O2 sensor.
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