P0145: O2 Sensor Circuit Slow Response — Bank 1 Sensor 3
What to do
No driveability impact. Usually indicates a worn sensor.
What this code means
The bank 1 third sensor is responding sluggishly, generally an aged element. Sensors in this position often accumulate the highest mileage without ever being replaced, since they attract attention only when a code appears.
Likely causes
Start here
Less common
- Contaminated oxygen sensor element · easy
- Exhaust leak before the sensor · moderate
- Failed oxygen sensor heater element · easy
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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