Code P0011, makes a rattling noise while driving?

The diagnostic trouble code (DTC) P0011 generally means "A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1).
In simpler terms, it indicates an issue with your vehicle's variable valve timing (VVT) system, specifically concerning the intake camshaft on Bank 1. The engine's computer (ECM/PCM) has detected that the camshaft's position is not matching the desired position, meaning it's "too early" or over-advanced compared to what it should be.
Here's a breakdown of what that means and common causes/symptoms:
Understanding Variable Valve Timing (VVT):
Modern engines use VVT systems to optimize engine performance and fuel efficiency across different RPMs. They do this by adjusting the timing of when the intake and/or exhaust valves open and close. This adjustment is typically done using oil pressure to move components called camshaft phasers or actuators.
Bank 1 and "A" Camshaft:
* Bank 1: Refers to the side of the engine that contains cylinder #1.
* "A" Camshaft: Typically refers to the intake camshaft. In dual overhead cam (DOHC) engines, there's a separate camshaft for intake and exhaust.
Common Causes of P0011:
* Low or Dirty Engine Oil: The VVT system relies heavily on clean, properly pressurized engine oil. Low oil levels, contaminated oil, or incorrect oil viscosity can prevent the camshaft actuators from functioning correctly.
* Faulty Camshaft Position (CMP) Sensor: This sensor monitors the camshaft's position and sends information to the ECM. A faulty sensor can send incorrect readings, leading the ECM to incorrectly detect an over-advanced condition.
* Faulty Variable Valve Timing (VVT) Solenoid/Actuator/Oil Control Valve (OCV): This is a critical component that controls the oil flow to the camshaft phaser, allowing it to adjust the timing. If it's stuck open, clogged, or electrically faulty, it can cause the camshaft to be over-advanced.
* Timing Chain/Belt Issues: A stretched or worn timing chain/belt, or a faulty tensioner, can cause the camshaft timing to be off relative to the crankshaft. This is often a more serious and costly repair.
* Engine Sludge Buildup: Sludge can clog oil passages and the VVT components, restricting oil flow and preventing proper operation.
* Faulty Engine Control Module (ECM/PCM): While less common, a malfunctioning ECM could incorrectly command or interpret camshaft timing.
* Damaged Wiring: Open or shorted wiring to the camshaft position sensor or VVT actuator can also cause this code.
Common Symptoms of P0011:
* Illuminated Check Engine Light (CEL): This is almost always the first sign.
* Rough Idle: The engine may run unevenly, especially at idle.
* Reduced Engine Performance: You might experience a decrease in power or acceleration.
* Decreased Fuel Economy: The engine won't be operating as efficiently.
* Hard Starting or Stalling: In more severe cases, the engine may struggle to start or stall.
* Engine Misfires or Noise: You might hear unusual noises from the engine.
What to Do:
It's important to address a P0011 code as soon as possible. While you might be able to drive with it for a short period, ignoring it can lead to more serious engine damage over time.
Diagnosis and Repair Steps (often performed by a mechanic):
* Check Engine Oil: Verify the oil level and condition. Change the oil and filter if it's dirty or low.
* Inspect Wiring and Connectors: Look for any visible damage, corrosion, or loose connections to the VVT solenoid and camshaft position sensor.
* Test VVT Solenoid/OCV: A mechanic can test the solenoid for proper operation (e.g., resistance, clicking sound when actuated). Sometimes, cleaning a clogged solenoid can resolve the issue.
* Test Camshaft Position Sensor: The sensor's readings can be monitored with a scan tool.
* Check Timing Chain/Belt: This requires more in-depth inspection, potentially involving removing covers.
* Engine Flush: If sludge is suspected, an engine flush might be recommended.
* Replace Faulty Components: Based on the diagnosis, replace the problematic sensor, solenoid, or timing components.
* Clear Codes and Test Drive: After repairs, clear the code and perform a test drive to ensure the issue is resolved.
Given the potential for serious engine damage, it's generally recommended to have a professional diagnose and repair the P0011 code.

So what is happening is the oil control valve for the camshaft is stuck open or the camshaft actuator itself is stuck, so I would change out the oil control valve, change the engine oil and filter, and then clear the codes once the job is completed.

The P0011 code means the bank one camshaft is over advanced bank 1

Here is the location of the valve so you can swap it out. Check out the images (below). Let us know what you find.