PowertrainP014C

Caution

Severity: Caution - get it checked when you can

O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1)

35 brands affected · Generic SAE J2012 description.

Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · Bank 1: the side of the engine containing cylinder 1 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This code is in the fuel, air and oxygen sensor range, which also includes coolant temperature faults.

2Common causes

Dirty or faulty mass air flow sensor
Vacuum or intake air leak
Weak fuel pump or clogged fuel filter
Faulty fuel injector
Faulty oxygen sensor
Wiring or connector fault

3Can I drive?

Caution · drive with care

Have it diagnosed if the engine runs badly or the code keeps returning. Because this range includes coolant temperature sensors, watch the temperature gauge: if it climbs into the red, or the engine overheats or stalls, stop safely and get professional help.

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 35

Brand	Code	Description	System
Ashok Leyland CV	P014C	Safety Restraint System. Left Side. Sensor 5 Brand	Powertrain
BAIC Motor	P014C	Upstream oxygen sensor response implausible Brand	Powertrain
Mercedes-Benz	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
BYD	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Chery	P014C	Oxygen sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Chrysler	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Daewoo	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
DFFS	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
DFFX	P014C	The upstream oxygen response is too slow Brand	Powertrain
DFXK	P014C	Upstream O2 response too slow Brand	Powertrain
EOBD	P014C	Oksygenføler treg respons - rik til mager bank 1 sensor 1 Brand	Powertrain
Geely	P014C	Front oxygen response too slow Brand	Powertrain
GM	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Great Wall	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Hafei	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Holden	P014C	HO2S Slow Response Rich to Lean Sensor 1 Brand	Powertrain
Honda	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Hyundai	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Isuzu	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Land Rover	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Mahindra	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Maserati	P014C	O2 Sensor 1/1 Slow Response - Rich to Lean Brand	Powertrain
Mitsubishi	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Nissan	P014C	Air/Fuel sensor 1 (bank 1) /P014D Brand	Powertrain
Opel	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Peugeot	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Proton	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Renault	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Saab	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
MG (SAIC)	P014C	O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 Brand	Powertrain
Sprinter	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Subaru	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Suzuki	P014C	A/F SENSOR1 (B1) Brand	Powertrain
Tata	P014C	O2 Sensor Slow Response - Rich to Lean (Bank 1 Sensor 1) SAE	Powertrain
Toyota	P014C	Upstream oxygen sensor rich-to-lean response time too slow 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.

5Extended variant codes 5

These 7-character codes are manufacturer-specific variants of P014C and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P014C00	Die Fett- und Magerumschaltung der Lambdasonde 1 (Zylinderreihe 1) ist zu langsam. Brand	Powertrain
SsangYong	P014C00	Front wide band oxygen sensor positive slow response Brand	Powertrain
Mercedes-Benz	P014C02	Die Fett- und Magerumschaltung der Lambdasonde 1 (Zylinderreihe 1) ist zu langsam. Es liegt ein allgemeiner Signalfehler vor. Brand	Powertrain
Sprinter	P014C02	Die Fett- und Magerumschaltung der Lambdasonde 1 (Zylinderreihe 1) ist zu langsam. Es liegt ein allgemeiner Signalfehler vor. Brand	Powertrain
Mercedes-Benz	P014C26	Die Fett- und Magerumschaltung der Lambdasonde 1 (Zylinderreihe 1) ist zu langsam. Signaländerungsrate ist unterhalb des zulässigen Grenzwertes. Brand	Powertrain

6Related codes

Browse Pxxx codes or P014xx codes.