What Causes the Engine Malfunction Light to Turn Off After Revving the Throttle?
2 Answers
The reasons why the engine malfunction light turns off after revving the throttle include insufficient fuel in the fuel tank, which fails to achieve normal adsorption pressure. Blockage in the fuel line can lead to reduced fuel pressure and poor acceleration. A faulty throttle pedal sensor may result in driving at only one RPM without response to throttle input. A malfunctioning throttle body can also cause unresponsiveness during acceleration. Inspection: Check the spark plugs, high-voltage wires, and ignition coils. Inspect the fuel pump pressure and check if the fuel injectors are clogged. Also, examine the ignition system for any misfires. Precautions: For an automatic transmission with manual mode, try switching to manual mode and downshifting by 1–2 gears. For a purely automatic transmission, try releasing the throttle slightly before pressing it down firmly again.
I had the same issue with my car last time, the engine warning light was on and really alarming. A few hard stomps on the gas pedal made it go away, and later when I took it to the repair shop for inspection, the experienced mechanic said it was a carbon buildup problem. Driving too gently usually causes thick deposits to accumulate inside the engine, triggering false sensor warnings. Revving the engine raises exhaust temperatures, temporarily burning off some carbon deposits, so the signal returns to normal. But using this trick too often harms the car and can cause the warning light to come on intermittently. I ended up getting a deep carbon cleaning and replacing the spark plugs, and it hasn’t happened since. I suggest you also read the trouble codes to diagnose the issue.
