Which effect occurs when a turbocharger wastegate solenoid fails closed in an engine?

💡 Explanation

When a wastegate solenoid fails closed, the wastegate remains shut, leading to overboosting because exhaust gases are not diverted, increasing cylinder pressure and temperature, potentially causing engine knock. Therefore knock results, rather than changes in fuel/oil which are tied to direct injector control or viscosity changes.

• Which risk increases when a lathe's tool post excessively vibrates during a high-speed turning operation?
• Which risk increases when gasoline direct injection encounters excessively high cylinder temperatures?
• Which risk increases after poor welding practices on high-strength steel bridge support beams?
• Which outcome occurs when an engine's turbocharger experiences oil oxidation due to excessive heat?
• Which outcome occurs when a local oscillator's frequency drifts in a homodyne receiver?
• Which outcome is LEAST likely by using feedforward control in high-speed hydraulic actuators?