poo11 intake camshaft position timing over advanced 9

Here’s a good video that explains how to test the camshaft actuator using a scan tool: You certainly don’t want to start here since, a lot of the time, it’ll be something else that causes the P0011 to appear. The actuator solenoid itself can go bad over time. Wrong Viscocity (Too Thick or Too Thin): If you recently had an oil change and your Impreza now has this code, change the oil again, and verify that the shop used the right oil.īad Intake Camshaft Position Actuator or Actuator Solenoid.Dirty Oil: If the oil and/or oil filter haven’t been changed in a long time, sometimes it can cause the camshaft actuator to clog up with sludge.It needs to be low enough to lower the engine’s oil pressure (which is really low). Low Oil: The most common cause of P0011 is low oil.There are three ways that it can cause P0011: The first thing you should do is check your Impreza’s oil. Here are the most common causes, presented to you in order from the easiest thing to check to the most difficult: Engine Oil Sometimes the P0011 fix is as easy as topping off the oil. Quite a few things can cause the P0011 code in your Subaru Impreza. Hard to Start– With the timing too far advanced, it won’t be easy to start the motor, especially when it is warm.Service Engine Soon Light- Most of the time, you’ll be able to feel or see one of the above symptoms, but if you can’t, the service engine soon light will still come on and let you know something is wrong.Lost Power– Your car’s engine will not be able to produce as much power this is because the cam profile will not allow it to run a performance power curve when you need more power.

Decreased Gas Mileage– Now that your Impreza’s engine can no longer adjust its cam timing on the fly, it will no longer be able to produce optimum combustion, which causes poor economy.A rattling sound can also indicate the timing chain jumped a tooth. Rattling Sound– You may hear the camshaft actuator rattling at idle speed since it’s not where it’s supposed to be.Poor Idle Quality– If the camshaft actuator fails while it is too far advanced, it’ll idle roughly.Here are some of the typical symptoms of P0011 in the Subaru Impreza: When the cam timing is off, it can cause some issues with the motor. It’s usually the cylinder head closer to the front of the engine. If your Impreza has a “V” engine with two cylinder heads, you’ll need to look up which side is bank 1. If your Impreza has an inline engine, you don’t need to concern yourself with this. Bank 1īank one is the side of the engine with the first cylinder. Here’s a detailed write-up on exactly how VVT works if you’re interested in learning more. Some simpler systems change the cam timing, while others change cam profiles entirely. They are hydraulic, which means that they use the vehicle’s engine oil to change the intake valve timing. Valve timing control methods can be quite different for every engine, even from the same manufacturer, but the basics are the same.Ĭamshaft actuators or phasers change how long the intake and exhaust valves stay open. When this happens, your Subaru Impreza will store trouble code P0011. Sometimes, the system will get stuck in an over-advanced position. VVT allows the engine to act as though it has different camshaft profiles at different RPMs this is great for both power and fuel economy. Vehicles with VVT can change camshaft position timing depending on whether you need power or economy. The camshaft’s position is constant relative to the crank’s position on vehicles that don’t have variable valve timing. Camshaft Position TimingĬamshaft position timing how your Subaru Impreza’s intake and exhaust valves close relative to the location of the crankshaft. Here it is separated into its separate pieces, with a quick explanation of each. The technical definition of P0011 for the Impreza is “A” Camshaft Position Timing Over Advanced or System Performance (Bank 1). Not usually, but in rare cases, the underlying causes can damage the engine Low oil, wrong oil viscosity, faulty camshaft actuator, timing chain/belt jumped Stalling, decreased MPG, rattling, engine running rough, check engine light P0011 “A” Camshaft Position Timing Over Advanced or System Performance (Bank 1) P0011 Trouble Code: Quick Info Definition If the oil level is too low, the camshaft actuators won’t work properly. The first thing you should do when you have this code is check your Impreza’s oil. It indicates an issue with your car’s Variable Valve Timing (VVT) system. P0011 is a common (and serious) OBD II diagnostic trouble code that can occur in the Subaru Impreza.

Poo11 intake camshaft position timing over advanced 9