PowertrainP2256

Caution

Severity: Caution - get it checked when you can

O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1

32 brands affected · Description from Toyota data.

Key terms: Control module: a small computer that runs one part of the car · Bank 2: the side of the engine containing cylinder 2 · Powertrain: engine, transmission and emissions

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

Sensor or actuator fault
Wiring or connector fault
Vacuum or intake leak
Fuel or ignition problem
Control module fault

3Can I drive?

Caution · drive with care

Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 32

Brand	Code	Description	System
Ashok Leyland CV	P2256	No description available	Powertrain
BAIC Motor	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
Mercedes-Benz	P2256	No description available	Powertrain
BYD	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
Chery	P2256	Oxygen (Lambda) Sensor B2 S1: Negative Lead: Short to Plus Brand	Powertrain
Daewoo	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
Daihatsu	P2256	A/F sensor B2S1- voltage Brand	Powertrain
DFFS	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
DFFX	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
DFXK	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
EOBD	P2256	Syresensor negativ strömkontrollkrets hög bank 2 sensor 1 Brand	Powertrain
Geely	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
GM	P2256	HO2S reference ground circuit high voltage bank 2 sensor 1 Brand	Powertrain
Great Wall	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
Hafei	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
Holden	P2256	HO2S Low Reference Circuit High Voltage Bank 2 Sensor 1 Brand	Powertrain
Honda	P2256	No description available	Powertrain
Hyundai	P2256	No description available	Powertrain
Isuzu	P2256	No description available	Powertrain
Land Rover	P2256	Oxygen sensor negative current control - circuit high. Bank 2 - sensor 1 Brand	Powertrain
Mitsubishi	P2256	No description available	Powertrain
Opel	P2256	HO2S reference ground circuit high voltage bank 2 sensor 1 Brand	Powertrain
Perodua	P2256	A/F sensor B2S1- voltage Brand	Powertrain
Peugeot	P2256	No description available	Powertrain
Porsche	P2256	Lambdasonde Vor Kat Bank 2 virtuelle Masse - max Brand	Powertrain
Proton	P2256	No description available	Powertrain
Saab	P2256	HO2S Reference Ground Circuit High Voltage Bank 2 Sensor 1 Brand	Powertrain
MG (SAIC)	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
Smart	P2256	No description available	Powertrain
Suzuki	P2256	O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 1) Brand	Powertrain
Tata	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain
Toyota	P2256	O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 Brand	Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Related codes

Browse Pxxx codes or P225xx codes.