PowertrainP0038

Caution

Severity: Caution - get it checked when you can

HO2S Heater Control Circuit High (Bank 1 Sensor 2)

39 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 and air metering range, which includes fuel-pressure and camshaft-timing 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 promptly. Some codes in this range affect fuel pressure or camshaft timing; if the engine loses power, runs badly, 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 39

Brand	Code	Description	System
Ashok Leyland CV	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
BAIC Motor	P0038	Rear oxygen sensor heater short to high voltage Brand	Powertrain
Mercedes-Benz	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
BMW	P0038	Short circuit to positive Brand	Powertrain
BYD	P0038	Oxygen sensor heater high Brand	Powertrain
Chery	P0038	Oxygen sensor heater high Brand	Powertrain
Daewoo	P0038	HO2S Heater Control Circuit High Bank 1 Sensor 2 Brand	Powertrain
Daihatsu	P0038	O2 sensor heater Brand	Powertrain
DFFS	P0038	Lost communication with spoiler unit Brand	Powertrain
DFFX	P0038	Oxygen sensor heater high Brand	Powertrain
DFXK	P0038	Rear oxygen sensor heater short to high voltage Brand	Powertrain
EOBD	P0038	HO2S värmare styrkrets hög bank 1 sensor 2 Brand	Powertrain
Geely	P0038	Oxygen sensor heater high Brand	Powertrain
GM	P0038	HO2S Heater Control Circuit High Bank 1 Sensor 2 Brand	Powertrain
Great Wall	P0038	Oxygen sensor heater high Brand	Powertrain
Hafei	P0038	Oxygen sensor heater high Brand	Powertrain
Holden	P0038	HO2S Heater Control Circuit Sensor 2 Brand	Powertrain
Honda	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Hyundai	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Isuzu	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Land Rover	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Mahindra	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Maserati	P0038	Oxygen sensor heater circuit high (bank 1 sensor 2) Brand	Powertrain
Mitsubishi	P0038	Oxygen sensor heater high Brand	Powertrain
Opel	P0038	HO2S Heater Control Circuit High Bank 1 Sensor 2 Brand	Powertrain
Perodua	P0038	O2 sensor heater Brand	Powertrain
Peugeot	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Porsche	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Proton	P0038	Oxygen sensor heater high Brand	Powertrain
Saab	P0038	HO2S Heater Control Circuit High Bank 1 Sensor 2 Brand	Powertrain
MG (SAIC)	P0038	HO2S Heater Control Circuit High Bank 1 Sensor 2 Brand	Powertrain
Smart	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Sprinter	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) SAE	Powertrain
Subaru	P0038	HO2S Heater Control Circuit High Brand	Powertrain
Suzuki	P0038	HO2S Heater Control Circuit High (Bank 1 Sensor 2) Brand	Powertrain
SWM Motor	P0038	Rear oxygen sensor heater short to high voltage Brand	Powertrain
Tata	P0038	Oxygen Sensor 2 - Bank 1 - Heater High Brand	Powertrain
Toyota	P0038	Downstream oxygen sensor heater short to high voltage Brand	Powertrain
Volkswagen	P0038	Oxygen (Lambda) sensor B1 S2: heating circuit: short to plus; Short to plus 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 3

These 7-character codes are manufacturer-specific variants of P0038 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P003800	Der Ausgang für Heizung der Lambdasonde 2 (Zylinderreihe 1) hat Kurzschluss nach Plus. Brand	Powertrain
SsangYong	P003800	HO2S heater circuit high (bank 1 / sensor 2) Brand	Powertrain
Mercedes-Benz	P003812	Der Ausgang für Heizung der Lambdasonde 2 (Zylinderreihe 1) hat Kurzschluss nach Plus. Es liegt ein Kurzschluss nach Plus vor. Brand	Powertrain

6Related codes

Browse Pxxx codes or P003xx codes.