DTC OBDII P0315 Code
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DTC OBDII P0315 Code
Has anyone ever had any experience with this code in their truck?
I read it with my Superchips DTC reader and then cleared the code.
P0315 - Crankshaft Position System Variation Not Learned
It doesn't sound good. Time will tell I guess.
I read it with my Superchips DTC reader and then cleared the code.
P0315 - Crankshaft Position System Variation Not Learned
It doesn't sound good. Time will tell I guess.
Lead Driver
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From: in the woods of MA
This indicates the computer was unable to measure the crank position sensor characteristics for your engine. It uses this information to detect misfires, among other things. There's a (approx 30-40 position?) sensor on the crank. Since the measurements depend on being able to very accurately determine position, and the sensor isn't built to those tolerances, the computer "learns" the variations in each sensor point from ideal by measuring the position of each in a no-power situation. This is usually done during a couple of 60mph-40mph zero-throttle decelerations. Could be a computer problem, bad wire, or just a bad sensor?
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Check the wiring to the crank sensor, and after that, change the sensor itself (if it's cheap enough).
If it still comes back, I'd suspect the PCM's input for the crank sensor is going bad (not what you want to hear).
Either that, or you haven't driven it on the highway and decelerated with your foot completely off the pedal enough
If it still comes back, I'd suspect the PCM's input for the crank sensor is going bad (not what you want to hear).
Either that, or you haven't driven it on the highway and decelerated with your foot completely off the pedal enough
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Yes, the check engine light was on.
I have an ESP warranty so any sensors would be covered. I just hope that I don't have one of those problems that goes away for now and then comes back when the warranty is done. Especially if it is engine damage.
I reset the code and it hasn't came back yet. If it does come back I will be going to the dealer.
I have an ESP warranty so any sensors would be covered. I just hope that I don't have one of those problems that goes away for now and then comes back when the warranty is done. Especially if it is engine damage.
I reset the code and it hasn't came back yet. If it does come back I will be going to the dealer.
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Well, the check engine light came back on.
Brought it to the dealer today and they are going to replace the PCM.
Brought it to the dealer today and they are going to replace the PCM.
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Replaced the PCM back in July and guess what, the code came up again a couple of weeks ago. I disconnected the battery for a bit and took it for a good hard drive and lets see what happens now. Problem is I don't put alot of miles on my truck so now it's wait and see time. If it happens again it's back to the dealer again. Only got a year left on my warranty and like for it to go away before then.
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Back to the dealer yesterday and they checked the wiring and replaced the crank shaft sensor and there is once again a pending 0315 code.
Could the PCM be faulty again? If it is, why?
Anyone got any other ideas?
Could the PCM be faulty again? If it is, why?
Anyone got any other ideas?
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"Starting to wonder if this is one of those crankshaft-endplay issues again, or just a wobbly tone ring?"
Does anyone else have any experiences or technical info to add to this thread?
The issue is at a stand still and the dealer doesn't know where to go next.
Looks like I will be just driving it and hope that there isn't an engine problem in my future.
Does anyone else have any experiences or technical info to add to this thread?
The issue is at a stand still and the dealer doesn't know where to go next.
Looks like I will be just driving it and hope that there isn't an engine problem in my future.
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Have a machinist/mechanic check the crankshaft end-play or do it yourself.
See if it's too high. Which means the crankshaft is moving around length-wise, which means the tone-ring that the crankshaft sensor reads is moving too far away from the sensor.
If that's OK, remove the crankshaft sensor, look down the hole (with a mirror if you have to) and see if the tone-ring is wobbling. If it is, you might need to change it (big job, need to take the timing cover off).
Otherwise, it might just need a sensor, or ...
There is a learning strategy for this. Not sure where it is right now, anyone remember anything about that?
See if it's too high. Which means the crankshaft is moving around length-wise, which means the tone-ring that the crankshaft sensor reads is moving too far away from the sensor.
If that's OK, remove the crankshaft sensor, look down the hole (with a mirror if you have to) and see if the tone-ring is wobbling. If it is, you might need to change it (big job, need to take the timing cover off).
Otherwise, it might just need a sensor, or ...
There is a learning strategy for this. Not sure where it is right now, anyone remember anything about that?
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