What is P0078 fault code? What is the Exhaust Valve Control Solenoid Circuit Bank 1 malfunction description. How can you fix P0078 fault code What are the causes and symptoms of the P0078 error code?
What is the P0078 fault code? What does it stand for?
When the powertrain control module, PCM determines that the voltage signal coming from the exhaust valve solenoid circuit exceeds the specified range, a code P0078 will be triggered. The engine row containing cylinder 1 is called “Bank 1” in this definition. The exhaust valve control solenoid can be found on the exhaust manifold side or the cylinder head.
The modern vehicle’s PCM controls the timing of the intake/exhaust valves opening and closing using the variable valve timing (VVT). The actuator(s), which are mounted at the ends of the camshaft(s), does this. It controls the solenoid that regulates oil pressure for the actuator(s). The PCM uses pulse width modulated signals (Pulse Width Modeulation / PWM), to monitor and command control solenoid. The code P0078 is activated when the PCM detects the voltage signal coming from the exhaust valve solenoid is irregular or out of range.
This code is similar with P0079 and 0080 fault codes. Sometimes the fault code P0027 and P0078 can be combined. P0078 is a fault code that affects vehicles of various makes, including Ford Focus, Ford Focus, Hyundai, Kia and Volvo, Renault, Peugeot Peugeot, Nissan, Infiniti, Renault, Renault, Peugeot, Renault, Peugeot and Renault.
What causes the P0078 Fault code?
- – Defective exhaust control solenoid (Bank 1
- – Short circuits, damaged wires and loose connections
- Low engine oil
- – Use of low viscosity or dirty engine oil
- – Defective PCM (rarely)
What are the symptoms of the P0078 Fault code?
- – Illumination and control of the check engine light
- – Hesitation during acceleration
- – Engine Performance Problems
- – An increase in fuel consumption
How do I fix the P0078 fault code?
Depending on the vehicle’s make and model, the definition and repair of fault code “P0078” may vary. There may be differences in the VVT systems or methods used in vehicles. You should follow all instructions and research provided by the manufacturer before you replace any component.
- 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 exhaust valve control bank 1 is damaged, it should be replaced.
How serious is the Fault Code P0078?
Fault code P0078 can cause the engine to run irregularly, low performance, and excessive fuel consumption. This fault code must be resolved immediately to avoid further engine damage.
