What is the P0315 fault number? Crankshaft Position Change Not Learned: What’s the reason? How can I fix P0315 fault code What are the causes and symptoms for the P0315 fault code
What is the P0315 fault code? What does it signify?
The P0315 Code focuses on the relationship of the powertrain controller module (PCM), as well as the crankshaft positioning sensor. Thanks to the voltage signal from crankshaft position sensor, the PCM measures the difference in crankshaft position between the reference (start), point and actual crankshaft. The signal from the sensor will be compared to the reference voltage signals stored in the computer. The P0315 fault code will be triggered if the signal from the sensor is different than the reference voltage signal stored in the PCM. This code is usually triggered by an electrical fault. However, it may also be triggered by mechanical problems depending on the vehicle manufacturer.
Special crankshaft position sensors are used in spark-ignited engines. They work together with a threaded relay ring to determine the position and position of the cylinder. Depending upon the manufacturer, the crankshaft location is used to calculate three factors: the first, ignition timing, and ignition and injection timing. The third, misfire detection.
Simply put, the reluctor rings is a toothed ring that rotates with a crankshaft. It is located in front to the sensor. The magnetic field is created by the rotation of the crankshaft and the magnetic fields generated by the teeth within the ring. The distance between each tooth is equal except for one point. The PCM considers this point the reference point (or start) point. It is twice the width of the other teeth. The wide gap in this ring creates a voltage signal when the reluctor is passed in front of it. This is the point that the PCM uses to determine the position for cylinder 1 as well as the ignition timing.
If the timing of ignition and injection occurs at the right time, the engine should run normally. The engine could still fail to start if the reference point is different from the one stored in the PCM’s memory. It may also run at an erratic, choppy, or erratic idle speed. It all depends on how much variation there is between the reference point actually used and the reference point stored in the memory.
Disconnecting the battery in most vehicles can result in the loss of memory (KAM), but this is not always the case. The PCM could lose important information like crankshaft reference, idle speed, or crankshaft reference. It may be necessary to do a relearn procedure in such cases.
What is the P0315 Fault Code?
Here are some reasons why P0315 should be set.
- – Battery disconnection with no memory saver
- Damaged, burned, shorted or disconnected wires and/or connectors connecting the crankshaft position sensor to the PCM
- – Defective or unsuitable crankshaft position sensor
- – Damaged crankshaft reluctor ring
- Faulty timing belts or timing chains
- – Damaged crankshaft
- – Failing to complete the required relearn procedure, or failing to do the relearn procedure correctly
- – A PCM is not working properly or has to be reprogrammed
What are the symptoms for P0315 Fault Codes?
The symptoms of your vehicle may vary depending on what caused code P0315. These symptoms may be present if you have a vehicle that has the code 0315.
- – Illumination for the check engine light
- – Engine running hard, or not at all
- – Engine misfires
- Engine stalling
- – Engine hesitation and engine stumbling during acceleration
- RPM fluctuations at idle
- – Reduced engine performance
- – Increased fuel use
How to Fix the P0315 Fault Code
The following repairs may be able to resolve the P0315 fault code:
- – Reparation or replacement of the wiring harness around the crankshaft position sensor.
- – Replacing the defective crankshaft position sensor
- – Replacing the crankshaft reluctor rings
- – Replacing a defective timing belt/timing chain
- – Replacing a cracked or worn crankshaft
- – Reprogramming the PCM or replacing it
How Serious Is the P0315 Fault Coding?
P0315 can be a very serious fault code. If the main engine components are defective, this code could cause the engine to not start. Engine problems and misfires can happen even when the vehicle is in motion. To avoid engine damage, it is highly recommended that P0315 be fixed as soon as possible.
