P2276 code meaning
O2 Sensor Signal Biased/Stuck Lean (Bank 2, Sensor 3)
Powertrain system Generic code P22xx codes Check engine light
What P2276 means
P2276 needs three oxygen sensors on bank 2, so it only occurs on V or flat engines whose second bank carries a front, a mid-catalyst and a post-catalyst sensor. It reports that the post-catalyst sensor of bank 2 does not reach a rich reading. No manufacturer publishes a threshold for this exact code; Jaguar Land Rover lists it, with P2277 and the heater and circuit codes of that sensor, for the 2014 to 2016 3.0 supercharged V6 in the LR4, Range Rover and Range Rover Sport, where water on the hot element cracked the sensor. Ford's monitor runs the same switch-point test on sensors 2 and 3 and fails a rich peak below 0.42 V. CARB requires secondary sensors to be checked for sufficient output. If bank 1 is fault-free, compare both third sensors and look for an exhaust leak on bank 2.
P2276 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2276
- Malfunction indicator lamp on
- No noticeable change in driveability
Common causes of P2276
- Most likelyBank 2 third oxygen sensor aged or cracked by water
- PossibleExhaust leak on bank 2 ahead of sensor 3
- Less likelyDamaged wiring or connector of sensor 3
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Oxygen sensor downstreamOxygen sensor wiring
What each part of P2276 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 2 | Area: fuel and air metering (injector circuit). |
| 76 | The exact fault in that area. |
What to do next
- Note P2276 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 P2276
What does P2276 mean?
P2276 means "O2 Sensor Signal Biased/Stuck Lean (Bank 2, Sensor 3)". P2276 needs three oxygen sensors on bank 2, so it only occurs on V or flat engines whose second bank carries a front, a mid-catalyst and a post-catalyst sensor. It is a generic code, so it means the same on every make.
Is it safe to drive with P2276?
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 P2276 fail an emissions test?
Yes, it can. P2276 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 P2276 to fix?
Difficulty: medium. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2276 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.