CAR OBD CODES
OBD/DTC Search, e.g.P0385
CAR OBD CODES P0385
P0385 OBD Code Definition:
P0385 Crankshaft Position Sensor B Circuit
P0385 OBD Code Description:
OBD2 Code P0385 Definition:
The crankshaft position sensor (CKP) measures crankshaft location and relays this information to the PCM (Powertrain Control Module). Depending on the vehicle, the PCM uses this crankshaft position information to time the spark properly or on some systems it is only for misfire detection and does not control spark timing. The CKP sensor is stationary and works in harmony with a reluctor ring (or toothed ring) that is attached to the crankshaft. As this reluctor ring passes in front of the CKP sensor, the magnetic field created by the CKP sensor is interrupted and this creates a square wave voltage signal that the PCM interprets as crankshaft position. If the PCM detects that there are no crankshaft pulses or if it sees a problem with the pulses on the output circuit, P0385 will set.
Symptoms
Possible sumptoms of P0385
NOTE: If the crank sensor is used only for misfire detection and NOT spark timing (this varies with the vehicle), the vehicle should start and run with MIL (Malfunction indicator lamp) illumination. Also, some vehicles require several key cycles to illuminate the MIL. If this is the case, there may be no MIL illumination until the problem often enough over time. If the crank sensor is used for BOTH misfire detection and spark timing, the vehicle may or may not start. Symptoms may include: Vehicle may not start (see above) Vehicle may run rough or misfire MIL illumination
Possible Causes
Possible causes of P0385
Damaged CKP sensor connector Damaged reluctor ring (missing teeth or not turning due to sheared-off keyway) Sensor output open Sensor output shorted to ground Sensor output shorted to voltage Failed crank sensor Failed PCM
Possible Solutions
Using a scan tool, check if, when engine is running or cranking, that there is an RPM signal. If there is no RPM reading, then visually inspect the crank Sensor Bnd connector for any damage and repair as necessary. If there is no visible damage, and you have access to a scope, you could check the CKP 5 Volt square wave pattern. If you do not, then, obtain a resistance reading of your crank sensor from a repair manual. (There are so many different types of crank sensors that there’s no way to put here which resistance reading is correct). Then check the resistance of the CKP sensor by disconnecting the Sensor Bnd measuring resistance of the sensor. (It is best to check resistance readings from the PCM connector. This rules out any wiring problems from the start. But it does require some mechanical skill and shouldn’t be performed if you’re not familiar with automobile electrical systems). Is the sensor within resistance specs? If not, replace the CKP sensor. If so, recheck resistance reading from the PCM connector. Is the reading still okay? If not, repair open or short in the wiring to the crank Sensor Bnd re-check. If the reading is okay, the problem is intermittent or the PCM may be at fault. Try reconnecting and checking for RPM signal again. If there is now an RPM signal, wiggle test the wiring harness to try and induce the fault. OBD-II Codes
P0335 P0335 P0385 P0016 P0017 P0018 P0019 P0335 P0336 P0337 P0338 P0339 P0385 P0386 P0387 P0388 P0389
Note: The information on the P0385 error code is purely informative, if you need more useful information, please consult your technician.
B2B0C B1200 B00DF B1270 B292A B1419 B2757 B267C B2781 B259B B1467 B2201 B0560 B2416 B2372 OBDII Chassis Codes
P0C09 C0040 C1013 C1411 C1473 C1207 C198A C1118 C1928 C1A85 C1303 C1912 C1783 C1798 C1159 OBDII Network Codes
U1054 U1136 U1203 U0026 U2201 U0027 U261B U1217 U0483 U0260 U2064 U0183 U041E U0159 U1114 OBDII Powertrain Codes
P0AA8 P3012 P0618 P0198 P2053 P2059 P0AD4 P0922 P099A P0986 P171B P0325 P02D1 P0517 P2637