P001D OBD-II Trouble Code: “A” Camshaft Profile Control Circuit/Open

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Cost of diagnosing the P001D code

P001D is a diagnostic trouble code (DTC) for "“A” Camshaft Profile Control Circuit/Open". 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

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P001D code definition

“A” Camshaft Profile Control Circuit/Open

What the P001D code means

This diagnostic trouble code is an indication that the crankshaft and camshaft signals are out of time by some measure. When this happens the Power Control Module (PCM) stores the P001D trouble code and triggers the Check Engine Light.

What causes the P001D code?

The following are causes for the P001D trouble code:

  • Bad camshaft sensor
  • Bad crankshaft sensor
  • Damaged wires to the camshaft sensor
  • Loose or broken timing chain tensioner
  • Timing belt has jumped a tooth due to wear
  • Time chain worn out
  • A loose or missing harmonic balancer bolt

What are the symptoms of the P001D code?

If the crankshaft and camshaft signals are out of time and the P001D trouble code is present, the driver may experience the engine running poorly after starting, with a lack of power. It is also possible for the car to crank, but not run. The Check Engine Light should be on while these symptoms are present.

How does a mechanic diagnose the P001D code?

First, retrieve the trouble codes and freeze frame data stored on by the Power Control Module (PCM), using the OBD-II scanner. Inspect the wiring and connector for any breaks, shorts, or corrosion. If you have a scope, check the camshaft sensor pattern.

If the camshaft pattern is missing, you may have a bad camshaft sensor. A check of the harmonic balancer (crankshaft pulley) and camshaft gear tone rings should be done as well.

Also, check the timing belt or timing chain for wear that could be causing the chain or belt to be out of time. The timing chain/bolt tensioner should be inspected as well to make sure the timing chain/belt has the proper tension so it will not jump time.

If one or more of these components are damaged, repair as necessary. If all of these timings are in working order, the camshaft sensor will need to be replaced.

Common mistakes when diagnosing the P001D code

It is common for the camshaft sensor to be replaced before the timing chain/belt tensioner is inspected for breaks.

Another common mistake is not checking the timing chain/belt for stretching, as this will trigger the P001D code as well.

How serious is the P001D code?

The P001D trouble code could be considered serious because the car may not start, or lack power when power is necessary to maneuver out of the way of trouble. With the P001D trouble code present, the vehicle should not be driven until the necessary repairs have been completed.

What repairs can fix the P001D code?

Additional comments for consideration regarding the P001D code

It is important not to rush the diagnosis of this code, to ensure that all components of the camshaft sensor are inspected properly. Check the harmonic balancer (crankshaft pulley) for damage and always check the connector and wiring before replacing the sensor. If you have a scope, use it to look at the patterns of the camshaft and crankshaft to help with accurate diagnosis of the camshaft sensor.

Need help with a P001D code?

YourMechanic offers certified 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.

trouble codes
P001D
Check Engine Light

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Michael

17 years of experience
22 reviews
Michael
17 years of experience
Kia Forte - Check Engine Light is on - Bowie, Maryland
Great experience with Michael! He expertly went over the car issues and provided information on all inspection points. Thank you!

Jonathan

25 years of experience
2 reviews
Jonathan
25 years of experience
GMC Envoy - Check Engine Light is on - Atlanta, Georgia
Jonathan was amazing !!!! Incredibly friendly and extremely knowledgeable! I am very satisfied! Thank you Jonathan for making such a frustrating car situation feel like I have options now !

Jermaine

23 years of experience
101 reviews
Jermaine
23 years of experience
Saturn Ion - Check Engine Light is on - Washington, District of Columbia
Jermaine texted me to let me know that he was on his way. He was courteous and he arrived on time. Jermaine took the time to explain the problem I was having with my car and let me know that he would send a detailed report. I was more than happy with his service.

Andrew

14 years of experience
346 reviews
Andrew
14 years of experience
Toyota Echo - Check Engine Light is on - Beaverton, Oregon
Andrew arrived early, and got right to work. He knew the likely problem from my 10 second description, checked the vehicle diagnostics, and verified the diagnostics by swapping some parts and doing a quick test drive. He even showed me the OBD2 scanner output. The vehicle has over 151k miles, and Androw could easily have tried to upsell me on replacing all of the ignition coils, rather than just the faulty one, purely based on the vehicle's age -- but he didn't. He just replaced the one necessary, topped up fluids, mentioned it was time for an oil change and new tires in the back, and that was it. Everything was fixed inside of an hour, while working in the rain.


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