P0315 OBD-II Trouble Code: Crankshaft Position System Variation Not Learned

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0315 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0315 code

P0315 is a diagnostic trouble code (DTC) for "Crankshaft Position System Variation Not Learned". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0315 DIAGNOSTIC Get a fair and transparent estimate upfront

check engine light

What the P0315 code means

P0315 is the OBD-II generic code for a fault involving the crankshaft position system. The signals from the crankshaft are received by the powertrain control module. The sensor connected to the vehicle’s crankshaft stays in time by transmitting voltage signals to the powertrain control module. The voltage transmitted is compared to the reference voltage stored by the powertrain control module. If the difference between the signals exceeds a certain percentage, then the P0315 code is stored by the OBD-II system.

What causes the P0315 code?

The P0315 code has a number of common causes: * Faulty wiring around crankshaft position sensor * Faulty or corroded sensor connector * Faulty crankshaft position sensor * Faulty powertrain control module * Damaged crankshaft * Broken timing belt

What are the symptoms of the P0315 code?

When the P0315 code appears, the Check Engine light will illuminate on the dashboard after a short while. Depending on the cause of the P0315 code, the symptoms exhibited by the vehicle will vary. If the cause of the problem is electrical, the symptoms will include the Check Engine light on the dashboard and possibly a drop in fuel economy. If the problem causing the code is mechanical, then the engine will be exhibiting systems like a rough idle and poor performance.

How does a mechanic diagnose the P0315 code?

The P0315 code will be diagnosed by a qualified technician with an OBD-II scanner capable of viewing the factory readings from the OBD-II system. This will allow the technician to not only view the trouble codes that have been stored, but to see the time the issues occurred. This information will be recorded and the codes will be reset. The vehicle will then be taken for a test drive. If the code appears once again during the drive, then it will confirm that the issue is not just an intermittent one.

Once the issue is confirmed to be the P0315 code, the technician will inspect the crankshaft position sensor and the wiring and circuitry associated with the sensor.

Common mistakes when diagnosing the P0315 code

With problems like the P0315 code that can have a mechanical or electrical origin, electrical problems are often diagnosed as mechanical problems and vice versa. This can be a very expensive mistake if the problem lies with an electrical connector and a major component like the crankshaft is repaired or replaced unnecessarily.

How serious is the P0315 code?

The P0315 code is a very serious trouble code. The code itself can result in the engine being rendered unable to start. The code can be caused by the failure of major components within the engine. If the code does not render the engine unable to start, the problems that caused the code to be stored can negatively affect fuel economy and performance. If the P0315 code appears, have it assessed by a qualified technician as soon as possible.

What repairs can fix the P0315 code?

The most common repairs to address the P0315 code are as follows:

Additional comments for consideration regarding the P0315 code

In some instances, the crankshaft position sensor and associated wiring is damaged during the replacement of a broken timing belt. This damage can cause the P0315 code to appear.

Need help with a P0315 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

P0315
trouble codes
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0315 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,203

Rating Summary
2,919
140
39
22
83
2,919
140
39
22
83

Nathan

26 years of experience
198 reviews
Nathan
26 years of experience
Nathan was knowledgeable about my car and very educational as well. He explained everything he was doing and why. I admire his attention to detail. He really showed genuine interest and attentiveness to the problem. He’s a great conversationalist and was easy to work with.
2013 CHEVROLET CRUZE - CHECK ENGINE LIGHT IS ON - GLENPOOL, OKLAHOMA

Mack

19 years of experience
72 reviews
Mack
19 years of experience
Very nice and knew what he was doing. Got what I needed done even though was told wrong by the office.
1999 FORD F-150 - CHECK ENGINE LIGHT IS ON - MIDLOTHIAN, TEXAS

Scott

31 years of experience
24 reviews
Scott
31 years of experience
Very nice friendly mechanic. Very helpful with with questions that I had. Offered good advice. He explained some of the problems to me and what should be the next to resolve it before spending unnecessary monies. This was my first time using him and will not be my last. I would recommend him to anyone. Especially women because he does not seem to take advantage of our knowledge of not knowing things about cars.
2001 HYUNDAI ELANTRA - CHECK ENGINE LIGHT IS ON - PARKVILLE, MARYLAND

Tyrone

6 years of experience
61 reviews
Tyrone
6 years of experience
He showed up on time and got my diagnostic done quickly. He also gave me honest recommendations on what I need to do for my car.
2008 HONDA ACCORD - CHECK ENGINE LIGHT IS ON - CULVER CITY, CALIFORNIA

More related articles

How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...

Related questions

Q: AC failed and started running rough and the Check Engine Light came on. But NOW its fine.

I wouldn't concern yourself with the timing of your cars symptoms. When a car fails, I liken it to when a light bulb decides to burn out. It was just its time. Everything will eventually fail. I also would strongly...

Q: My engine light came on code shoed P0037 its a Lexus is300 is it just changing the o2 sensor?

P0037 is an oxygen sensor code referring to bank 1 sensor 2. This is the right hand side of the engine and the second sensor on that side. The code may be caused by the catalyst on that side or...

Q: Check engine light is flashing and reduces the power of the engine.

If the light is flashing then the computer system should have stored codes as to why the problem is happening. I recommend having the computer scanned by a certified technician, such as one from YourMechanic, to retrieve the codes and...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com