PowertrainP014D

Caution

Severity: Caution - get it checked when you can

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

34 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 34

Brand	Code	Description	System
Ashok Leyland CV	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
BAIC Motor	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Mercedes-Benz	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
BYD	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Chery	P014D	Oxygen sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Chrysler	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Daewoo	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
DFFS	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
DFFX	P014D	The upstream oxygen response is too slow Brand	Powertrain
DFXK	P014D	Upstream O2 response too slow Brand	Powertrain
EOBD	P014D	Oksygenføler treg respons - mager til rik bank 1 sensor 1 Brand	Powertrain
Geely	P014D	Front oxygen response too slow Brand	Powertrain
GM	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Great Wall	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Hafei	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Holden	P014D	HO2S Slow Response Lean to Rich Sensor 1 Brand	Powertrain
Honda	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Hyundai	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Isuzu	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Land Rover	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Mahindra	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Mitsubishi	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Nissan	P014D	Air/Fuel sensor 1 (bank 1) P014C Brand	Powertrain
Opel	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Peugeot	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Proton	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Renault	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Saab	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
MG (SAIC)	P014D	O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1 Brand	Powertrain
Sprinter	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Subaru	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Suzuki	P014D	A/F SENSOR1 (B1) Brand	Powertrain
Tata	P014D	O2 Sensor Slow Response - Lean to Rich (Bank 1 Sensor 1) SAE	Powertrain
Toyota	P014D	Upstream oxygen sensor lean-to-rich 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 2

These 7-character codes are manufacturer-specific variants of P014D and may be reported by some scan tools.

Brand	Code	Description	System
Hyundai	P014D00	To compare front and rear lambda sensor signal, ECM determines defected lambda sensor unit by monitoring lambda sensor signal dynamics. If error is detected ECM sets DTC Brand	Powertrain
SsangYong	P014D00	Front wide band oxygen sensor negative slow response Brand	Powertrain

6Related codes

Browse Pxxx codes or P014xx codes.