PowertrainP004C

Caution

Severity: Caution - get it checked when you can

Turbocharger/Supercharger Boost Control B Circuit Low

27 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 · Boost pressure: extra air pressure made by a turbo or supercharger · 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 27

Brand	Code	Description	System
Ashok Leyland CV	P004C	Right Wheel Rear Axle Speed Sensor. Slipping Error Brand	Powertrain
BAIC Motor	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
BYD	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
Chery	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
Daewoo	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
DFFS	P004C	Lost communication with remote communication unit Brand	Powertrain
DFFX	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
DFXK	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
EOBD	P004C	Krug nadzora tlaka punjača/turbopunjača 'B' nizak Brand	Powertrain
Ford	P004C	Turbocharger/Supercharger Boost Control B Circuit Low SAE	Powertrain
Geely	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
GM	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
Great Wall	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
Hafei	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
Holden	P004C	Turbocharger 1 Wastegate Brand	Powertrain
Honda	P004C	Turbocharger/Supercharger Boost Control B Circuit Low SAE	Powertrain
Hyundai	P004C	Turbocharger/Supercharger Boost Control B Circuit Low SAE	Powertrain
Land Rover	P004C	Turbo/supercharger boost control solenoid B circuit low Brand	Powertrain
Mitsubishi	P004C	Turbocharger/Supercharger Boost Control B Circuit Low SAE	Powertrain
Opel	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
Peugeot	P004C	Turbocharger/Supercharger Boost Control B Circuit Low SAE	Powertrain
Saab	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
MG (SAIC)	P004C	Turbocharger/Supercharger Boost Control Solenoid B Circuit Low Brand	Powertrain
Suzuki	P004C	Turbocharger / Supercharger Boost Control 'B' Circuit Low Brand	Powertrain
Tata	P004C	Turbocharger/Supercharger Boost Control B Circuit Low SAE	Powertrain
Toyota	P004C	Lost communication with remote communication unit Brand	Powertrain
Volkswagen	P004C	Boost pressure control valve/solenoid (bank 2): short to GND; 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.

5Related codes

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