What Is the P0028 Code?
Symptoms
Causes
Seriousness
Can I Still Drive?
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Difficulty of Inspecting
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The P0028 code is set when the engine control module/powertrain control module (ECM)/(PCM) detects that the intake valve on an engine’s variable valve lift (VVL) isn’t operating as commanded. The intake valve is operated by a solenoid that’s controlled by the engine’s circuitry. The solenoid can’t control the timing of the intake valve if there is a short or open circuit. The code is detected when a faulty solenoid pushes the chambers on the intake valve out of sync.
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What Are the Symptoms of a P0028 Code?
Regardless of the cause, a common symptom of a P0028 code is a check engine light. Another common symptom is that your engine lacks power. The entire point of the variable valve lift is to enhance fuel efficiency and engine power. So when a component of the VVL system is out of place, the engine will be less efficient. Your engine may run rough, hesitate, or stutter while idle or driving. You may also notice that your vehicle consumes more fuel than usual.
What Are Some Causes of a P0028 Code?
A common cause of a P0028 code is contaminated oil. The intake valve functions by taking in oil within its chambers, and the pressure is what makes the camshafts operate. When chambers take in contaminated oil, the system may be damaged. Some parts of the intake valve system can also malfunction, such as the camshaft actuator, the control solenoid, the timing chain, or the timing belt. The ECM or PCM can also malfunction and cause problems with the solenoid.
How Serious Is the P0028 Code?
A P0028 code is moderately serious. However, if the issue is left uninspected for too long, the seriousness of the problem can escalate. A faulty intake valve messes up the timing of the entire variable valve timing system, which is a crucial part of your engine. Your engine will not function the way it’s supposed to with this code and the problem may exacerbate over time.
Can I Still Drive with a P0028 Code?
Your car is still functional with a P0028 code, but you shouldn’t drive it. No matter how minor the symptoms may seem, engine problems make the vehicle very unsafe to drive. Not to mention, using the engine while it presents this kind of engine problem can damage other parts of the variable valve timing system. The intake valve works with the exhaust valve to help with fuel economy and efficiency based on the engine’s performance. A faulty intake valve disrupts the timing of the exhaust valves, which can then de-synchronize the rest of the system. Because of this, it’s advised that you drive as little as possible while this code is active.
How Easy Is It to Diagnose a P0028 Code?
Misdiagnosing a P0027 code is relatively easy. This is because you would need to have intricate knowledge of the engine’s circuitry to understand where the problem lies. Different car models also have different engine specifications. So unless you have expert knowledge about the make and model of the car, it’s very difficult to diagnose this sort of code. This is why many prefer to take their car to a professional to get this code diagnosed with accuracy.
How Difficult Is It to Inspect a P0028 Code?
Inspecting a P0028 code can be just as difficult as diagnosing it. The intake valve has many pieces that work together that make sure oil passes through each chamber properly and on time based on the engine’s load. Improper inspection can desynchronize any one of these chambers, even if the solenoid is receiving enough voltage. A professional is capable of inspecting each component without mishandling the rest of the system.
Need Additional Help with Your P0028 Code?
Getting a P0028 code means that your engine is in trouble. Not only will it run rough, but your car may become a money pit as it burns through more fuel than it normally would. This is why you should take it to a professional to get this problem solved as quickly as possible.
You can use Kelley to find a service center in your area. You’ll find the expert closest to you so you can get a local, reliable inspection. If your car is broken down, taking it to the service center closest to you will also reduce the cost of towing.
If you’re seeing a P0028 code, you may want to know more about related codes. Take a look at the OBD-II database to understand more about these codes and what they mean for your car.
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