P0153: O2 Sensor Circuit Slow Response Bank 2 Sensor 1
A generic powertrain (engine and transmission) trouble code, same meaning on every brand.
Yes - expect gradually worse economy rather than a sudden problem.
Symptoms
- Fuel economy drifting down
- Slightly uneven running
- Emissions test failure
Likely causes, most common first
- Bank 2 upstream sensor aged and slow
- Deposits on the sensing element
- Small exhaust leak drawing in outside air
- Engine consuming oil
Read P0153 yourself before paying for diagnosis
A basic Bluetooth OBD-II scanner ($20-40) plugs into the port under the dashboard and shows this code with live sensor data on your phone - useful both for confirming the fix and for talking to a shop from an informed position.
What is going on and how it gets diagnosed
P0153 means the bank 2 upstream sensor switches too slowly between rich and lean. A healthy upstream sensor crosses its midpoint several times a second at steady cruise; one that has aged responds in a lazy curve, and fuel trim accuracy goes with it.
Sensors on both banks are the same age and see the same conditions, so if one is slow the other is usually not far behind. Replacing upstream sensors in pairs costs more today and often less over two years, particularly when access requires lifting the car anyway.
Repair options and cost
Typical US independent-shop ranges, parts and labor. Dealers run higher; regional labor rates vary.
Cars that report P0153 most often
Based on mentions of this code in NHTSA owner complaints.
Frequently asked questions
Can I drive with P0153?
Yes - expect gradually worse economy rather than a sudden problem.
How much does it cost to fix P0153?
Typical US repair costs range from $150 for the simplest fix (upstream oxygen sensor) to $600 in the worst case. The right number depends on which cause your car has - see the causes list.
Related codes
The codes closest to P0153. They often appear together, and telling them apart is usually what narrows the diagnosis.
Definition per SAE J2012 standard nomenclature. Symptoms, causes and costs are editorial guidance - always confirm with a diagnosis of your specific vehicle.