P2275: O2 Sensor Signal Biased/Stuck Rich (Bank 1, Sensor 3)

P2275 is the rich-side fault of the third oxygen sensor on bank 1, the last one on systems with two catalysts in series: it keeps a high voltage while the exhaust should be lean. VW's 2014 data books for the CC, Passat and Tiguan check it in fuel cut-off, comparing the voltage with 0.15 V once 4500 mg of oxygen have passed, more than the 3000 mg used for sensor 2 because the extra catalyst stores oxygen first. Jaguar Land Rover includes P2275 among the bank 1 post-catalyst sensor codes of its 2014 to 2016 3.0 supercharged V6 and replaces water-damaged sensors. Fouling by oil, coolant or sealant and a signal wire touching voltage are other plausible causes. P2271 is the same fault at sensor 2; P0144 reports a voltage above the valid range rather than a stuck reading.

Medium severity. Can I keep driving?Yes, you can normally drive in moderation, but get it repaired soon: you will use more fuel and the catalytic converter can be damaged over time.

Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.

Symptoms

Malfunction indicator lamp on
No noticeable change in driveability

Most likely causes

Third oxygen sensor contaminated or damaged by water
Signal wire of sensor 3 touching a voltage source

What to check, in order

Start with the simplest. You can tick off each step.

Check the wiring and connector of the sensor indicated
Use the scanner to command the movement and compare the actual position with the requested one.
Look for exhaust leaks
Check the signal in live data with the engine warm
Check the fuse and the heater resistance if the code mentions it
Replace the sensor if it has power and does not respond

Good to know

Repair difficulty: medium
It affects emissions.

What each character of P2275 means

P: Powertrain: engine and transmission
2: Generic code: same on every make
2: Fuel injection
75: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2275?

Yes, you can normally drive in moderation, but get it repaired soon: you will use more fuel and the catalytic converter can be damaged over time.

What causes code P2275?

The most common causes are: third oxygen sensor contaminated or damaged by water; signal wire of sensor 3 touching a voltage source.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.