PowertrainP051B

Caution

Severity: Caution - get it checked when you can

Crankcase Pressure Sensor Circuit Range/Performance

25 brands affected · Description from Toyota data.

Key terms: Powertrain: engine, transmission and emissions

1What it means in plain English

This range covers vehicle speed, idle and oil-pressure control, charging-system voltage, and brake-switch circuits.

2Common causes

Carbon build-up in the throttle body
Faulty idle air control valve
Faulty vehicle speed sensor
Faulty charging system or weak battery
Wiring or connector fault

3Can I drive?

Caution · drive with care

Codes in this range include oil-pressure, brake-switch and charging-system voltage faults. If the oil-pressure warning light is on, stop the engine as soon as it is safe and do not drive until it is diagnosed. If the battery or charging warning light is on, drive straight to a workshop: the car can stall when the battery runs flat. For any other P05 code, have the car diagnosed promptly rather than continuing to drive.

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 25

Brand	Code	Description	System
Ashok Leyland CV	P051B	No description available	Powertrain
BAIC Motor	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
BYD	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
Chery	P051B	Crankcase pressure sensor circuit implausible Brand	Powertrain
Daewoo	P051B	No description available	Powertrain
DFFS	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
DFFX	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
DFXK	P051B	Crankcase pressure sensor circuit implausible Brand	Powertrain
EOBD	P051B	Veivhustrykksensor 'A' krets område/ytelse Brand	Powertrain
Geely	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
GM	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
Great Wall	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
Hafei	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
Holden	P051B	Positive Crankcase Ventilation (PCV) Pressure Sensor Performance Brand	Powertrain
Hyundai	P051B	No description available	Powertrain
Isuzu	P051B	No description available	Powertrain
Land Rover	P051B	Crankcase pressure sensor - Circuit range/performance Brand	Powertrain
Maserati	P051B	Crankcase pressure sensor A circuit performance Brand	Powertrain
Opel	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
Peugeot	P051B	No description available	Powertrain
Porsche	P051B	No description available	Powertrain
Saab	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
MG (SAIC)	P051B	Crankcase Pressure Sensor Circuit Range/Performance Brand	Powertrain
Subaru	P051B	No description available	Powertrain
Toyota	P051B	Crankcase Pressure Sensor Circuit Range/Performance 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 P051B and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P051B00	The differential pressure sensor 'Crankcase ventilation system' has a malfunction. Brand	Powertrain
Mercedes-Benz	P051B28	Crankcase Pressure Sensor Circuit Range/Performance Signal-Offset ist außerhalb des zulässigen Bereiches. Brand	Powertrain

6Related codes

Browse Pxxx codes or P051xx codes.