Engine CAM code P0021?

BHAMDOC1973

MEMBER
2015 SUBARU OUTBACK
4 CYL
4WD
AUTOMATIC
155,000 MILES

I thought the problem I had with the mess while driving was solved by replacing the plugs, but it came back. So, it seems to only happen when the car is cold. No lights on the dash until this happens, feels like you almost out of gas, couple of hiccups, never stalls or shut off, traction, brake, ABS, and check engine lights all come on. I scanned it and the brake lights came just due to the mess from engine, so it is not it. The engine came with code p0021 for cam. Any suggestions? And where is it located? Is it one on passenger side by front of the valve cover? This engine has so many sensors it's hard to pinpoint it.

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,959 POSTS

I would remove the intake valve timing control solenoid on Bank 2 and see if the oil screen is clogged, the engine oil must be clean and full as well. Please check the electrical connector to the valve and actuator. Here is more information as well.

The error code P0021 on a 2015 Subaru Outback corresponds to a problem with the Variable Valve Timing (VVT) system. This code specifically indicates an issue with the intake valve timing control solenoid on Bank 2.

The VVT system is responsible for adjusting the timing of the intake and exhaust valves to optimize engine performance and fuel efficiency. When the ECM detects a problem with the intake valve timing control solenoid, it triggers the P0021 error code.

Here are some possible causes for this error code:

Faulty intake valve timing control solenoid: The solenoid may be stuck or not functioning correctly, preventing proper control of the intake valve timing.

Wiring or connector issues: Loose or damaged wiring or connectors associated with the intake valve timing control solenoid can cause an electrical problem and trigger the code.

Engine oil issues: Insufficient or contaminated engine oil can affect the operation of the VVT system, including the intake valve timing control solenoid.

To diagnose and resolve the issue, you can follow these steps:

Inspect the wiring and connectors related to the intake valve timing control solenoid. Look for any signs of damage, corrosion, or loose connections. Repair or replace any faulty components as needed.

Check the engine oil level and condition. Ensure that the oil level is correct and that the oil is clean. Dirty or contaminated oil should be replaced, and any underlying issues, such as clogged oil passages or a faulty oil filter, should be addressed.

If the wiring, connectors, and engine oil are in good condition, it is likely that the intake valve timing control solenoid itself is faulty. In this case, it may need to be replaced.

Check out the images (below). Please let us know how it goes.

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