PowertrainP01B7

Caution

Severity: Caution - get it checked when you can

Compressed natural gas (CNG) rail temperature sensor voltage is high

15 brands affected · Description from Toyota data.

Key terms: Oxygen sensor: measures oxygen in the exhaust gas · Mass air flow sensor: measures the air going into the engine · 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 15

Brand	Code	Description	System
Ashok Leyland CV	P01B7	No description available	Powertrain
Daewoo	P01B7	No description available	Powertrain
DFFS	P01B7	Compressed natural gas (CNG) rail temperature sensor voltage is high Brand	Powertrain
DFFX	P01B7	CNG (natural gas) rail temperature sensor short circuit to high voltage Brand	Powertrain
EOBD	P01B7	Litar sensor suhu rel bahan api alternatif tinggi Brand	Powertrain
GM	P01B7	No description available	Powertrain
Holden	P01B7	Alternative Fuel Rail Temperature Sensor Circuit High Voltage Brand	Powertrain
Honda	P01B7	No description available	Powertrain
Isuzu	P01B7	No description available	Powertrain
Land Rover	P01B7	Alternative Fuel Rail Temperature Sensor Circuit High Brand	Powertrain
Opel	P01B7	No description available	Powertrain
Peugeot	P01B7	No description available	Powertrain
Proton	P01B7	No description available	Powertrain
Saab	P01B7	No description available	Powertrain
Toyota	P01B7	Compressed natural gas (CNG) rail temperature sensor voltage is high 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

Browse Pxxx codes or P01Bxx codes.