P001D Camshaft Profile Control Circuit / Open Bank 2

P001D Camshaft Profile Control Circuit / Open Bank 2

OBD-II DTC Datasheet

Camshaft Profile Control Circuit / Open Bank 2

What does this mean?

This is a generic powertrain diagnostic trouble code (DTC) and is commonly applied to OBD-II vehicles. Affected vehicles may include, but are not limited to, Volvo, Chevrolet, Ford, Dodge, Porsche, Ford, Land Rover, Audi, Hyundai, Fiat, etc. While they are general, the exact repair steps may vary depending on year of manufacture, brand, model and transmission. configuration.

The camshaft is responsible for the position of the valves. It uses a shaft with petals integrated into the design for a specific size (depending on the manufacturer and engine model) in order to accurately open and close valves with the correct number / speed with the correct mechanical timing. The crankshaft and camshaft are connected mechanically using different styles (e.g. belt, chain).

The description of the code refers to the "profile" of the camshaft. Here they mean the shape or roundness of the petal. Some systems use these adjustable lobes, I will call them, to accurately integrate more efficient “lobe design” at specific times. This is beneficial because at different engine speeds and loads, having a different camshaft profile can increase volumetric efficiency, among other benefits, depending on the operator's requirements. It is important to note that in most cases this is not just another physical lobe, manufacturers simulate a “new lobe” using different strategies (eg switchable / adjustable rocker arm components).

The letter "2" in the description in this case is very valuable. Not only can the camshaft be on both sides, but there can be 2 shafts on each cylinder head. Therefore, it is important to clarify which camshaft you are working with before proceeding. As for banks, bank 1 will be with cylinder #1. In most cases, B refers to the exhaust camshaft and A refers to the intake camshaft. It all depends on which specific engine you're working with, as there are countless different designs that modify these diagnostic routines depending on which one you have. See the manufacturer's service manual for details.

The ECM (Engine Control Module) turns on the CEL (Check Engine Light) with P001D and related codes when it detects a malfunction in the camshaft profile control circuit. P001D is set when there is an open in bank 2 circuit.

What is the severity of this DTC?

The severity is set to medium. However, this is a general guideline. Depending on your specific symptoms and malfunctions, the severity will vary significantly. Generally speaking, if there is any hydraulic problem or something to do with the internal systems of the engine, I recommend fixing the problem as soon as possible. This is not really an area of ​​the car that you want to neglect, so see a professional to diagnose and have it repaired!

What are some of the symptoms of the code?

Symptoms of a P001D trouble code may include:

• Low power
• Poor handling
• Reduced fuel economy
• Abnormal throttle response
• Overall decrease in efficiency
• Changed power ranges

What are some of the common causes for the code?

Reasons for this P001D code may include:

• Lack of oil care
• Wrong oil
• Contaminated oil
• Defective oil solenoid
• Stuck valve
• Broken wire
• Short circuit (internal or mechanical)
• ECM (Engine Control Module) problem

What are some steps to troubleshoot the P001D?

Basic step # 1

The first thing you need to do here is check the overall integrity of the oil currently being used in your engine. If the level is correct, check the purity of the oil itself. If black or dark color, change oil and filter. Also, always keep an eye on your oil supply schedule. This is extremely important in this case because when your oil is not properly maintained, it can slowly become contaminated. This is a problem because oil that has accumulated dirt or debris can cause malfunctions in the engine's hydraulic systems (i.e., the camshaft profile control system). Sludge is another consequence of poor oil care and can also cause various engine systems to malfunction. With all that said, refer to your service manual for a schedule and compare with your service records. Very important!

NOTE. Always use the viscosity grade recommended by the manufacturer. Oil that is too thick or too thin can cause problems down the road, so make sure before buying any oil.

Basic step # 2

Locate the harness, wires and connectors used in the camshaft profile control circuit. You will need to find a wiring diagram to help identify the wire. Diagrams can be found in your vehicle's service manual. Check all wires and harnesses for damage or wear. You should also check the connections on the connector. Connectors are often unscrewed due to broken tabs. Especially these connectors, because they are subject to constant vibration from the motor.

NOTE. It is recommended to use electrical contact cleaner on contacts and connections to make it easier to connect and remove connectors during operation and in the future.

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