Fault Code Lookup › Powertrain codes › P0315
P0315 Powertrain · generic OBD-II
Crankshaft Position System Variation Not Learned
P0315 is a standard code covering engine, transmission, fuel and emissions. It names the system that logged the fault, not the part that failed. Below: which cars owners reported it on, what happened, and recalls on those cars, from 3 complaints filed with NHTSA. Updated November 9, 2026.
- 3owner reports
- 3car models
- 0mention a crash
- 0mention a fire
- 2015–2025model years
Which cars get code P0315?
Every model whose owners mentioned P0315 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Where does P0315 show up?
By brand
- Mercedes-Benz1
- Ford1
- Ram1
Component the owner filed it under
Is there a recall for P0315?
As of November 9, 2026, no NHTSA recall on the cars reporting P0315 names this code or its most-reported component. Recalls can be issued at any time: check your VIN at nhtsa.gov/recalls.
What happened when owners saw P0315?
3 of the 3 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
CHECK ENGINE LIGHT ON WHILE ON HIGHWAY, AFTER GETTING OFF THERE WAS A VERY ROUGH IDLE. TOWED TO FRONTIER FORD IN SAN JOSE, CA. FOUND P0302, P0315 PCM. ENGINE MISFIRE. #2 CYLINDER WAS FOUND TO HAVE COOLANT INSIDE. A NEW ENGINE LOG BLOCK IS NEEDED TO CORRECT THIS CONCERN. THIS ENGINE CLEARLY HAS A NUMBER OF ISSUES, REPORTED BY MANY OTHER OWNERS. IT WOULD SEEM THAT THIS ENGINE HAS ABOUT A 5 YEAR LIFE REGARDLESS OF MILEAGE. A RECALL NEEDS TO BE ISSUED IN ORDER FOR FORD TO PAY FOR THIS FAULTY ENGINE. THIS IS A VERY DIFFICULT TIME FOR MANY PEOPLE ACROSS THE COUNTRY AND IT'S ONLY RIGHT THAT FORD IS RESPONSIBLE FOR CORRECTING THIS ISSUE. *TR
The check engine light illuminated and the engine began running rough with misfires. Stored fault codes included P0301 and P0302 (cylinder 1 and cylinder 2 misfire detected) and P0315. An initial repair facility replaced spark plugs, ignition coils, the main battery and the auxiliary battery, which did not resolve the condition, and the vehicle was referred to an authorized Mercedes-Benz dealer. The Mercedes-Benz dealer performed an engine inspection and found compression of approximately 80 PSI caused by severely leaking intake and exhaust valves. The dealer determined the complete cylinder head requires replacement and estimated the repair at $7,545.72. The vehicle is currently not…
My 2025 RAM 2500 is throwing a P0315 Engine Code. This is part of the NHTSA ID Number: 11016056 and Manufacturer Communication Number: S251800000. Dealer has advised me to not drive the vehicle until there is a fix for it. Truck only has 150 miles on it.
P0315: questions drivers ask
What does code P0315 mean?
P0315 is a generic OBD-II powertrain code. Its standard definition is "Crankshaft Position System Variation Not Learned". The code tells you which system set the fault, not which part failed; the owner reports on this page show what it meant in practice for 3 car models.
Which cars get code P0315 most often?
In NHTSA owner complaints, P0315 is mentioned most for the Ford Fusion (1), Mercedes-Benz CLA-Class (1), Ram 2500 (1), across 3 models and model years 2015 to 2025. Popular models collect more reports because more of them are on the road.
Is there a recall for code P0315?
As of November 2026, no NHTSA recall on the cars reporting P0315 names this code or its most-reported component. Recalls can be issued at any time, so check your VIN at nhtsa.gov/recalls.
What should I do if my car shows P0315?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P0315. The definition is the generic SAE J2012 wording; a carmaker may use the code slightly differently. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.
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