CAR OBD CODES
OBD/DTC Search, e.g.P0391
CAR OBD CODES P0391
P0391 OBD Code Definition:
P0391 Camshaft Position Sensor B Circuit Range/Performance Bank 2
P0391 OBD Code Description:
OBD2 Code P0391 Definition:
The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. The high resolution is one of the most important inputs by the PCM for fuel control and timing. This test monitors the number of high resolution pulses which have been missed (not detected). It’s based on a comparison between the number of pulses that were detected since the last pump cam pulse and the number of the pulses that should have occurred. There are approximately 64 high resolution pulses for every cam pulse.
Symptoms
Possible sumptoms of P0391
– Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
Possible causes of P0391
– Open or short in the optical sensor circuit – Optical sensor connector – Damaged optical sensor – Damaged PCM or ECM The Error code is generally activated on detection of the following conditions: Some high resolution pulses are missing from the optical sensor to the PCM
Possible Solutions
– If damage, repair optical sensor circuit – Replaced optical sensor – Replaced PCM or ECM
Note: The information on the P0391 error code is purely informative, if you need more useful information, please consult your technician.
B0028 B126A B1680 B2387 B1915 B1813 B1580 B2004 B2218 B2A23 B1A81 B293E B2805 B190A B1321 OBDII Chassis Codes
C1929 C1965 C1B21 C001A C112A C0265 C1778 C1851 C1516 C1402 C1910 C2013 C2808 C2303 C1791 OBDII Network Codes
U0489 U0248 U2521 U0491 U0403 U0493 U3006 U0323 U1182 U044A U2615 U0019 U0437 U0402 U1154 OBDII Powertrain Codes
P1335 P0189 P2150 P06A6 P1450 P0C7D P2619 P20E3 P1828 P029F P2426 P3008 P0BD1 P0019 P1200