If you’ve owned a car for some time, chances are you’ve seen the dreaded check engine light come on at some point. And if you’ve ever gone to a mechanic to get it checked, you may have been told your car is showing the P3403 fault code. But what exactly does that mean?
Cylinder 1 Deactivation/Intake Valve Control Circuit Low
Causes of the P3403 Fault Code
The P3403 code is primarily related to the “Cylinder Deactivation System Performance” in a vehicle. In modern engines, some cylinders can be deactivated under light load to save fuel. However, if this system fails, it can result in the P3403 fault code. There are several reasons why the Cylinder Deactivation System can fail and lead to the P3403 code:
- Faulty solenoids or switches
- Wiring issues
- Problems with the lifters or camshaft
- Clogged oil passages or oil pump problems
Symptoms of the P3403 Fault Code
It’s possible that you won’t notice any obvious issues with your car immediately after the P3403 code appears. However, here are some symptoms that may occur if this code is not addressed:
- Engine misfires or runs rough
- Reduced fuel efficiency
- Inability to use the cylinder deactivation system
If left untreated, the P3403 code could eventually lead to lasting damage to the engine or transmission, so it’s important to address it as soon as possible.
How to Fix the P3403 Fault Code
Luckily, in many cases, the fix for the P3403 code is relatively simple. One solution is to replace any faulty solenoids or switches that are causing issues with the cylinder deactivation system. Additionally, ensuring proper oil viscosity and changing the oil at regular intervals can help reduce the likelihood of clogs. If these steps don’t work, it may be necessary to replace the affected lifters, camshafts, or other components. It’s important to consult with a qualified mechanic or service technician to ensure the right repair is made.
The P3403 fault code can be a frustrating and potentially harmful issue for car owners. Remember to take note of any symptoms and have the issue addressed quickly to prevent further engine damage. Regular maintenance and care can go a long way in preventing issues with the cylinder deactivation system that can cause the P3403 fault code. Keywords: P3403 fault code, error code P3403, cylinder deactivation system, engine misfires, fuel efficiency.