What is P0086 fault code and what does it mean? What is the Exhaust Valve Control Solenoid Circuit High, Bank 2 malfunction? How do you fix the P0086 fault code What are the causes and symptoms of the P0086 error code?
What is the P0086 fault code? What does it signify?
If the powertrain controller module (PCM), detects a high voltage within the exhaust valve control solenoid, the code P0086 is set. This code is similar in nature to P0084 or P0085 fault codes and can be accompanied with P0029 fault code. “Bank 2”, in the code’s description, refers to the engine bank without cylinder 1. This configuration is most common on V-type and boxer engines.
To ensure that an internal combustion engine works properly, the valves need to be open and closed at specific times. The intake valves are opened during the intake stroke to allow air to mix with the fuel. The intake and exhaust valves remain closed during compression and ignition stroke. The exhaust stroke is the opposite. In this case, both the intake and exhaust valves close. This works well with a medium-performance engine.
To achieve better performance and lower fuel consumption, modern vehicles come standard with variable valve timing (VVT). The PCM, or powertrain control module, adjusts the timing of the valves based on engine speed and engine rpm. Some VVT systems affect only the intake valves. Others alter the timing of both the exhaust and intake valves. The PCM uses a VVT control solenoid to adjust the camshaft position. Regulating engine oil pressure can cause the VVT solenoid to delay or cancel valve timing.
If the PCM detects an abnormal voltage signal on the solenoid circuit of the VVT control solenoid, a code P0086 will be set. The code is also displayed on the engine fault lamp and activates fail-safe mode. The VVT system is turned off until the fault can be repaired.
What is the P0086 Fault Code and Why Does It Happen?
P0086 is the most frequent cause of fault codes
- – Defective exhaust control solenoid (Bank 2).
- – Short circuit, damaged cables, and loose connections
- Low engine oil
- – Use of low viscosity or dirty engine oil
- – Defective PCM (rarely)
What are the symptoms for P0086 fault code?
These symptoms may be present if you own a vehicle that has the code P0086:
- – Illumination for the check engine light
- – Hesitation during acceleration
- – Problems with engine performance
- – Increased fuel consumption
How to Fix the P0086 Fault Code
Depending on the make or model of the vehicle, the definition and repair of fault code P0086 can differ. Vehicle VVT systems and methods may vary. It is important to read and follow all manufacturer instructions before replacing any component.
Here are some of the possible repairs that can resolve the P0086 fault codes:
- First, all codes must be cleared. Then, a road test should take place to determine if they return.
- If the code comes back, you should inspect the harness carefully. It is important to repair and clean any broken or damaged cables, loose connectors, or corrosion.
- – Make sure to check the engine oil. It should be replaced if it isn’t.
- – If the solenoid for the bank 2 exhaust valve control solenoid is damaged, it should be replaced.
How serious is the P0086 fault code?
P0086 is a code that can be found on older vehicles. The code may cause the engine to run irregularly if it is set. Lack of power can cause slow acceleration and other performance problems. You may also notice a significant rise in fuel consumption. You need to address the issue quickly to allow the vehicle to run normally again and ensure safety while driving.
