Fault code lookup

PowertrainP0391

Serious

Severity: Serious - have it checked soon

Camshaft Position Sensor B Circuit Range/Performance (Bank 2)

31 brands affected · Generic SAE J2012 description.

Key terms: Catalytic converter: cleans the exhaust gases · Bank 2: the side of the engine containing cylinder 2 · SAE J2012: the standard generic code list · Powertrain: engine, transmission and emissions

1What it means in plain English

This range covers ignition and engine-speed signals, including misfires and crankshaft or camshaft position sensors.

2Common causes

  1. Worn or fouled spark plug
  2. Faulty ignition coil
  3. Vacuum or intake air leak
  4. Low fuel pressure
  5. Faulty crankshaft or camshaft position sensor
  6. Low engine compression

3Can I drive?

Serious · drive with care

A failing crankshaft or camshaft sensor can cut the engine without warning, and a flashing check-engine light points to a misfire that can damage the catalytic converter. If the light is flashing, stop as soon as it is safe and have the car towed. Otherwise drive gently to a workshop; if it stalls or will not restart, have it towed.

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 31

BrandCodeDescriptionSystem
Ashok Leyland CVP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
BAIC MotorP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
Mercedes-BenzP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
BYDP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
CheryP0391Camshaft Position Sensor (G301): Implausible Signal BrandPowertrain
DaewooP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
DFFSP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
DFFXP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
DFXKP0391Camshaft Position Sensor (G301): Implausible Signal BrandPowertrain
EOBDP0391Bogha suímh camais 'B' raon/feidhmíocht banc 2 BrandPowertrain
GeelyP0391Camshaft Position Sensor (G301): Implausible Signal BrandPowertrain
GMP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
Great WallP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
HafeiP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
HoldenP0391Exhaust Camshaft Position Sensor Performance Bank 2 BrandPowertrain
HondaP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
HyundaiP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
IsuzuP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
Land RoverP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
MaseratiP0391Camshaft Position Sensor Circuit Performance - Bank 2 Sensor 2 BrandPowertrain
OpelP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
PeugeotP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
PorscheP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
ProtonP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
SaabP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
MG (SAIC)P0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
SubaruP0391Camshaft Position Sensor B Circuit Range/Performance (Bank 2) SAEPowertrain
SuzukiP0391Camshaft Position Sensor 'B' Circuit Range / Performance (Bank 2) BrandPowertrain
TataP0391Camshaft Position Sensor 'B' Circuit Range/Performance Bank 2 BrandPowertrain
ToyotaP0391Camshaft Position Sensor B Circuit Range/Performance Bank 2 BrandPowertrain
VolkswagenP0391Camshaft position sensor (G301): implausible signal; Short to ground BrandPowertrain

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

  • P0390 Camshaft Position Sensor B Circuit (Bank 2)
  • P0392 Camshaft Position Sensor B Circuit Low (Bank 2)
  • P0393 Camshaft Position Sensor B Circuit High (Bank 2)
  • P0394 Camshaft Position Sensor B Circuit Intermittent (Bank 2)
  • P0395 Cylinder 1 Pressure Sensor Circuit
  • P0396 Cylinder 1 Pressure Sensor Circuit Range/Performance
  • P0397 Cylinder 1 Pressure Sensor Circuit Low
  • P0398 Cylinder 1 Pressure Sensor Circuit High
  • P0399 Cylinder 1 Pressure Sensor Circuit Intermittent/Erratic
  • P039A Cylinder 1 pressure too low
  • P039B Cylinder 1 pressure too high
  • P039C Cylinder 1 pressure variation low

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