P001A OBD-II Trouble Code: "A" Camshaft Profile Control Circuit/Open

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P001A code definition

The P001A code indicates that camshaft and crankshaft signals have malfunctioned and are out of sync. The powertrain control module, or PCM, notes the timing issue and sets the code.

What the P001A code means

P001A is the OBD-II generic code that appears when the PCM detects a noticeable lack of synchronization between the movement of the camshaft and the crankshaft. Because the engine needs gas inside the cylinder, which is what A camshaft valves manage, any issues with the valves are a serious problem. The engine uses intake valves to bring fuel into its cylinders. There are also exhaust valves, but all of the valves are run on the camshaft and if there is a code that indicates that the circuitry responsible for operating the camshaft, it will mean that a host of performance issues can occur.

What causes the P001A code?

There are several issues that can lead to the PCM noting the P001A code:

  • Bad sensor in the camshaft or crankshaft
  • A damaged or loosened timing chain
  • A faulty timing belt or timing chain
  • Corroded or damaged sensor wiring
  • Defective camshaft sensor
  • Defective crankshaft sensor

What are the symptoms of the P001A code?

P001A code will typically have symptoms such as a poorly running engine, a no-start condition, reduced power in the engine, an engine that runs rough, and the appearance of the check engine light.

How does a mechanic diagnose the P001A code?

The P001A code is diagnosed by the technician using the OBD-II scanner. They ensure the code is present and look for any other codes that could be a sign of another issue. They use the freeze frame data too, and then clear the codes before retesting to see if the P001A appears. They will perform a visual inspection of any connections or wiring to ensure there are no open, shorts, corrosion or disconnections. They will make repairs as needed. They then use a scanner and digital ohm meter to test their camshaft's sensor and circuitry as well as that of the crankshaft and related components. The timing chain or belt may be tested as well.

Common mistakes when diagnosing the P001A code

It is not unusual for the technician to believe that it is a camshaft sensor that is the problem, without also considering issues such as the timing belt. This can also trigger the code and is something that needs to be considered during diagnostics and repair.

How serious is the P001A code?

A P001A code can prevent the vehicle from operating safely or at all. It can reduce power and make it difficult maneuver unexpectedly. It can have a negative impact on the engine's performance, and is not something that should be ignored or left alone for a long period.

What repairs can fix the P001A code?

There are a few ways that the P001A code is addressed:

Additional comments for consideration regarding the P001A code

Because wiring is such a common cause behind this code, it is important that full diagnostics occur. The camshaft profile control circuit issue can have serious effects on the performance of the engine, and yet it can be very difficult to diagnose without the use of proper tools.

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Arturo

25 years of experience
42 reviews
Arturo
25 years of experience
Volkswagen Tiguan - Brake Pads Replacement (Rear) - La Jolla, California
Arturo was efficient and extremely professional. I'll refer him to friends and family and call him for any issues related to my car. I am very happy with the service!
Kia Forte - Brake Pads Replacement (Front) - San Diego, California
ARTURO is great! very professional , fast, replaced my front brake pads and oil an filter change. everything now works and works well. Brakes have much improved stopping power and engine is smooth and quiet.Arturo is also kind and thoughtful. "Your mechanic" is very fortunate to have Arturo Lopez represent your company. I enthusiastically recommend him and "Your mechanic> as a fine operation Best regards to the Team Peter Marto

Travis

11 years of experience
312 reviews
Travis
11 years of experience
Ford Explorer Sport Trac - Brake Pads Replacement (Rear) - Minneapolis, Minnesota
Travis is great! This is the second time he has come and serviced our truck. I recommend Travis for any service ned you may have!
Subaru Forester - Brake Pads Replacement (Front, Rear) - Rosemount, Minnesota
Thank you Travis for your fast, easy, honest work on my vehicle today!! The first thing you did upon arrival to my home was find me a discount coupon for $50 off my service estimate. You did only what needed to be done in record time. You not only saved me lots of money, but did things in a profession manner. I've been looking for an honest auto mechanic for my whole life and would love for you to be it!! Thank you, thank you, thank you!! You're the best!!!

Scott

32 years of experience
346 reviews
Scott
32 years of experience
Hyundai Sonata - Brake Pads Replacement (Front, Rear) - Denver, Colorado
Arrived on time and worked quickly. Gave me detailed information on his completed work and the details of my car. Answered all of my questions thoroughly.
Lexus IS250 - Brake Pads Replacement (Rear) - Denver, Colorado
Always on time, speedy, professional, and pleasant to interact with. The work is always consistent and we'll done. I can't reccomend Scott highly enough!

Nicholas

9 years of experience
251 reviews
Nicholas
9 years of experience
Lexus GX470 - Brake Pads Replacement (Rear) - Clayton, North Carolina
Nicholas texted me 30 minutes prior to arrival. Showed up on time as scheduled. He confirmed the work that I requested be performed. He completed the work, performed the road tested, and delivered my keys along with recommendations of other work that might be in my best interest. Was very pleasant, professional, and cleaned up after he was done. I was so impressed with the service he performed and the speed at which the services were completed. I have already scheduled a future service with Nicholas and will schedule any and all future repairs with him if he is available.

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