P0150 code meaning
O2 Sensor Circuit Bank 2 Sensor 1
Powertrain system Generic code P01xx codes Check engine light
What P0150 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. P0150 is the bank 2 counterpart of P0130. Ford used it up to 2010 as the collective code for wiring faults of the bank 2 wide-band sensor reported by the interface chip and has used specific codes since 2011 (P0151, P0152, P2240/P2247/P2254). Other makers fill it as for bank 1 – an interface voltage check, a collective code or a plausibility test. No bank 2-specific manufacturer thresholds were found. If P0130 and P0150 appear together, look for a shared cause such as supply, ground or the control module. A stored code usually switches mixture control to open loop and suspends adaptation and converter monitoring.
P0150 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0150
- Check engine light on
- Higher consumption, possibly rough running (no mixture control)
- Higher emissions, possible emissions test failure
Common causes of P0150
- Most likelyWiring or connector of the bank 2 upstream sensor damaged, corroded or wet
- Most likelyOxygen sensor faulty internally
- PossibleExhaust leak ahead of the sensor or mixture fault (plausibility versions)
- Less likelyControl module or sensor interface chip faulty
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 P0150 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. |
| 50 | The exact fault in that area. |
What to do next
- Note P0150 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 P0150
What does P0150 mean?
P0150 means "O2 Sensor Circuit 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 P0150?
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 P0150 fail an emissions test?
Yes, it can. P0150 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 P0150 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0150 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.