You can find information about the P0011 fault code on this page.
It is one of the most popular fault codes that people search for on this website (in the top 50).
We have given it a seriousness of 9/10 with 1 being the least serious and 10 being the worst.
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Fault code P0011 is the code used when the engine control module (ECM) has detected the intake camshaft in bank 1 is further ahead in its cycle than desired. This occurs when the ECM is unable to correct the over-advancement of the camshaft in the first bank.
When this happens, it can cause a host of issues due to incorrect timing.
Camshafts are responsible for a host of engine operations but are typically responsible for ensuring the correct timing of the valves which control the amount of air or fuel in a given cylinder.
They need to be precisely in time with the rotation of the crankshaft to achieve proper operation.
This type of issue is more specific to vehicles with variable valve or camshaft timing. For the mirror fault code which represents this issue in bank 2, refer to P0021.
The more complicated the engine is, the greater the risk of a P0011 or other timing issues from being logged. Manufacturers like Chevrolet, Hyundai, Subaru, and Toyota appear to be more susceptible to these issues than others.
Other Signs of This Problem
Because of the severity of the issue, there are several very noticeable symptoms of an over-advancing camshaft. The first is that the Check Engine light will be illuminated or flashing.
The other signs involve just about every aspect of the car running. Idling, starting the car, and accelerating will all be very poor. The vehicle may also inexplicably stall or misfire.
Another sign is a rattling noise from the engine due to unbalanced forces in the various components.
What Could Be The Problem?
The most straightforward cause is due to the camshaft and crankshaft sensors indicating that the camshaft is too far advanced before the ECM is able to correct it.
A faulty camshaft actuator or variable valve timing (VVT) solenoid should also be checked as these both have the potential to disrupt the desired timing.
Issues with the oil system can also cause this error code. If the engine oil is too low or too dirty to properly lubricate the camshaft, it can cause the VVT solenoid to stick. Contaminants in dirty engine oil can prevent proper VVT operation.
A damaged or stretched timing belt or chain can also lead to this breakdown in the correct timing and the P0011 fault code appearing on an OBD2 reader.
(You can watch this YouTube video for a visual explanation of the P0011 problem along with 2 methods to try and fix it yourself include in it too)
If there are issues with any of the moving components like the camshaft oil valve or solenoid, replacing these parts can help return the vehicle to proper operation.
Check the oil for metallic flakes, dirt, or any other contaminants. Checking the oil filter can also help determine if the issue is here. If there is an issue with the oil, be sure to replace it with the correct oil.
Ensure this oil is fresh and has the correct viscosity for your engine. It is important to use the amount recommended in the owner’s manual.
Replacing a damaged or worn timing belt or chain can also rectify the issue. The timing chain should also be checked for the correct alignment.
Fault code P0011 is one of the most serious errors possible, particularly in terms of damaging your engine. Improper timing can cause serious damage to a host of components.
You should keep the engine of your vehicle off if it has logged this code. Fixing the cause of the fault code should be done immediately.
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