P2647 OBD-II Trouble Code: System Too Rich (Bank 1)

P2647 code definition

A Rocker Arm Actuator System Stuck on Bank 1

What the P2647 code means

This trouble code indicates that the powertrain control module has detected a malfunction in the intake camshaft rocker arm actuator system (A). This code is usually found in vehicles that have variable valve timing.

What are the causes of the P2647 code?

Some of the potential causes of this trouble code would include:

• The engine timing may be out of specification

• A faulty oil control valve or restricted orifice may be a factor

• Damaged wiring or connector that is associated with the oil control valve may be present

• Low oil pressure / Low engine oil may be causing this issue

• A faulty powertrain control module may exist

What are the symptoms of the P2647 code?

Symptoms of this trouble code that the driver may experience would include:

• Hesitation or stumble upon acceleration.
• Poor engine performance overall
• A check engine light

How does a mechanic diagnose the P2647 code?

The first thing a mechanic would do to diagnose this issue would be to check the engine oil level and check for a low oil pressure light. After that the mechanic would ensure that the engine timing is correct using the marks supplied by the manufacturer. If all timing marks appear to be correct, the mechanic would then test the variable valve timing parts to ensure proper function. Next, the mechanic would test all circuitry related to the variable valve timing system. Finally, the mechanic would use a high tech scan tool to test the powertrain control module. If any parts turn out to be faulty during this diagnosis, they would need to be replaced before moving to the next step. The mechanic would likely explain to the customer that multiple parts may need to be replaced and multiple diagnostic tests may need to be carried out.

Common mistakes when diagnosing the P2647 code

It is very easy to replace other parts in error when low or wrong engine oil is the actual cause of this issue. It is very important that checking the engine oil is the first step in the diagnostic process of this trouble code.

How serious is the P2647 code?

This trouble code would be considered serious regardless of the cause but more serious if a timing issue is present. This can cause severe engine damage especially in interference engines. It is important to have this trouble code diagnosed and repaired as soon as possible.

What repairs can fix the P2647 code?

Repairs that can resolve the issues that are caused by this trouble code would include:

• Adding or changing the engine oil

• Replacing the timing belt or chain as well as other timing components

• Replacing the oil control valve or other variable valve timing components

• Repairing or replacing wiring or connectors that are associated with the variable valve timing system

• Replacing the powertrain control module

Additional comments regarding the P2647 code

It is very important that the vehicle does not get driven much with this trouble code stored as severe engine damage may result. If this issue is not diagnosed sooner rather than later, the repair costs could increase significantly.

Need help with a P2647 code?

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