P0153 code meaning
O2 Sensor Circuit Slow Response Bank 2 Sensor 1
Powertrain system Generic code P01xx codes Check engine light
What P0153 means
The oxygen sensor before the catalytic converter on bank 2 (sensor 1) is the main control sensor for the mixture. It is either a switching sensor (about 0.1 V lean to 0.9 V rich) or a wide-band sensor that works with a pump current evaluated by an interface chip. Bank 2 exists only on engines with two exhaust manifolds. P0153 is the bank 2 counterpart of P0133: the sensor reacts too slowly to mixture changes. GM measures passively the average response time in both directions across 300/400–600 mV over 60 s and also fails too few transitions; Ford modulates the mixture itself and evaluates amplitude, signal line length or response times. The test runs once per drive at warm part load, two trips. The previous obdex title of this code wrongly repeated P0152's 'High Voltage'.
P0153 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P0153
- Check engine light on (after two drive cycles)
- Slightly higher consumption
- Higher emissions, possible emissions test failure
- P0430 may follow
Common causes of P0153
- Most likelyAged, sooted or poisoned upstream sensor (oil, silicone, coolant, additives)
- PossibleExhaust leak ahead of the sensor (manifold gasket, crack)
- PossibleSensor heater weak or intermittent (sensor too cold)
- PossibleMixture fault: air leak, injectors, fuel pressure, air flow sensor
- Less likelyWiring resistance or aftermarket sensor with different characteristics
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Oxygen sensor bank2 sensor1Oxygen sensor wiringEngine control module
What each part of P0153 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1 | Area: fuel and air metering. |
| 53 | The exact fault in that area. |
What to do next
- Note P0153 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0153
What does P0153 mean?
P0153 means "O2 Sensor Circuit Slow Response Bank 2 Sensor 1". The oxygen sensor before the catalytic converter on bank 2 (sensor 1) is the main control sensor for the mixture. It is a generic code, so it means the same on every make.
Is it safe to drive with P0153?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0153 fail an emissions test?
Yes, it can. P0153 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0153 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0153 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.