P1170
HO2S-11 No Change Detected
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)
Symptoms
- Increased fuel consumption
- Check Engine Light Is On
- Increased level of harmful emissions
- Minor loss of engine power
Causes
- Malfunction of the oxygen sensor (HO2S-11)
- Open or short circuit in the sensor circuit
- Poor contact in the sensor connector
- Malfunction of the catalytic converter
- Fuel system problems (too rich or lean mixture)
How to Fix
- Check the condition of the oxygen sensor and its connector
- Check the integrity of the wiring to the sensor
- Measure the resistance and voltage of the sensor
- Check the operation of the catalytic converter
- If necessary, replace the oxygen sensor