After the power reset of the Coaster, the fault code light is on and it can't accelerate. What's going on? Can any expert advise, please?

Fault code P0504, currently gears 1, 2, 3 are fine, but when switching to 4th gear, the car loses power when pressing the accelerator and doesn't accelerate. The RPM drops very slowly when pressing the clutch. Has anyone else experienced this?

Recently, my engine light came on. I went to the shop to reset it, but it came back on, indicating "Please check the emission system." Can any expert advise?

When should the timing belt be replaced on a 2016 Sportage with 80,000 kilometers? Experts, please advise.

After the power reset of the Coaster, the fault code light is on and it can't accelerate. What's going on? Can any expert advise, please?

I changed to a large screen on my V93 and now there's a fault code. The odometer isn't working, and the mileage isn't displaying. Can any experts advise on how to fix this?

The cigarette lighter in the central armrest box and the trunk has no power. Please advise.

What are the issues when the warning lights for these fault codes appear on a 2015 MG GT?

The acceleration noise of my Honda City is loud and lacks power. Please help!

Engine shows fault code, acceleration is weak, what could be the reason?

When braking, does this taillight light up? After the dashboard is powered on, all the fault codes light up, but they all disappear once the engine starts. Is this situation normal?