P1154
HO2S Transition Time Ratio Bank 2 Sensor 1
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$28–67 (est.)
Symptoms
- Increased fuel consumption
- Unstable engine operation at idle
- Check Engine Light Illuminates
- Reduced engine power
- Increased emissions of harmful substances
Causes
- Bank 2 Sensor 1 Oxygen Sensor Malfunction
- Air leaks in the exhaust system
- Problems with the fuel system (injectors, fuel pump)
- Sensor is dirty or damaged
- Problems with wiring to the sensor
How to Fix
- Check the condition of the oxygen sensor Bank 2 Sensor 1
- Inspect the exhaust system for leaks
- Check the operation of the fuel system
- Check the integrity of the wiring to the sensor
- Replace the faulty oxygen sensor if necessary