PowertrainP0034

Caution

Severity: Caution - get it checked when you can

Turbocharger/Supercharger Bypass Valve A Control Circuit Low

33 brands affected · Generic SAE J2012 description.

Key terms: Turbocharger: an exhaust-driven fan that pushes extra air into the engine · Supercharger: an engine-driven fan that pushes extra air into the engine · Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · 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 33

Brand	Code	Description	System
Ashok Leyland CV	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
BAIC Motor	P0034	OUTD Turbo Recirc Valve Flt Low Brand	Powertrain
Mercedes-Benz	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
BMW	P0034	Turbo Charger Bypass Valve Control Circuit Low Brand	Powertrain
BYD	P0034	Turbo boost bypass valve control circuit voltage low Brand	Powertrain
Chery	P0034	Turbo/supercharger bypass valve control circuit low Brand	Powertrain
Daewoo	P0034	Turbocharger Bypass Solenoid Valve Circuit Low Voltage Brand	Powertrain
DFFS	P0034	Lost communication with alarm device ECU Brand	Powertrain
DFFX	P0034	Turbine bypass valve circuit voltage is low Brand	Powertrain
DFXK	P0034	Discharge Valve Control Circuit Short to Ground Brand	Powertrain
EOBD	P0034	Turbolader/kompressor bypass-ventil 'A' styrekreds lav Brand	Powertrain
Geely	P0034	Discharge Contr. valve Contr. Circ. short to ground Brand	Powertrain
GM	P0034	Turbocharger/Supercharger Bypass Valve Control Circuit Low Brand	Powertrain
Great Wall	P0034	Turbocharger/Supercharger Bypass Valve Control Circuit Low Brand	Powertrain
Hafei	P0034	Turbocharger/Supercharger Bypass Valve Control Circuit Low Brand	Powertrain
Holden	P0034	Supercharger Bypass Solenoid Valve Control Circuit Low Voltage Brand	Powertrain
Honda	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
Hyundai	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
Isuzu	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
Land Rover	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
Maserati	P0034	Turbocharger/supercharger bypass valve 1 control circuit low Brand	Powertrain
Opel	P0034	Turbocharger/Supercharger Bypass Valve Control Circuit Low Brand	Powertrain
Peugeot	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
Porsche	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
Proton	P0034	Turbocharger/Supercharger Bypass Valve A Control Circuit Low SAE	Powertrain
Saab	P0034	Turbocharger/Supercharger Bypass Valve Control Circuit Low Brand	Powertrain
MG (SAIC)	P0034	Turbocharger Bypass Valve Control Circuit Short to Ground Brand	Powertrain
Subaru	P0034	Turbo Charger Bypass Valve Control Circuit Low Brand	Powertrain
Suzuki	P0034	Turbocharger / Supercharger Bypass Valve Control Circuit Low Brand	Powertrain
SWM Motor	P0034	Pressure relief valve control circuit short circuit to ground Brand	Powertrain
Tata	P0034	Turbo Charger Bypass Valve Control Circuit Low Brand	Powertrain
Toyota	P0034	Compressor relief valve control circuit voltage low Brand	Powertrain
Volkswagen	P0034	Turbocharger bypass valve control circuit: low 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 4

These 7-character codes are manufacturer-specific variants of P0034 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P003400	Der Ausgang für Umschaltventil der Bypassklappe 'Ladeluft' hat Kurzschluss nach Masse. Brand	Powertrain
Hyundai	P003400	If there is a short to ground in RCVS circuit, the ECM sets DTC Brand	Powertrain
Sprinter	P003400	Der Ausgang für Umschaltventil der Bypassklappe 'Ladeluft' hat Kurzschluss nach Masse. Brand	Powertrain
SsangYong	P003400	Turbocharger Bypass Valve Control Circuit Min fault Brand	Powertrain

6Related codes

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