The engine warning light is on, but it doesn't affect the power. I read the code P0685, cleared it once, and it came back on the next day. What could be the problem?

I bought a second-hand 2014 Kia Sportage, and the exhaust smells really bad. I hadn't driven it on the highway before, but a few days ago I did, and the engine warning light came on. The check indicated an issue with the oxygen sensor. After replacing it, the error code was cleared, but a few days later it came on again. It seems fine when not driving on the highway, but as soon as I do, the light comes on and stays on. Can any experts advise on how to fix this issue?

The check engine light on my Nissan Sunny came on, showing fault code P0705-00, which indicates an issue with the transmission range sensor A. The car suddenly jerked, and then the gear indicator on the dashboard disappeared. After turning off the engine and restarting, the gear indicator reappeared, but after a while, the check engine light came on again. I went to a repair shop to clear the fault code, and it seemed fine while driving, but the issue occurred again after some time. This has happened several times. Could it be a problem with the right tail light base?

I just got a 2011 Mazda 5 a couple of days ago. After only two days, the check engine light came on with the code P2177. Can anyone help explain this?

After the vehicle inspection, a series of warning lights for ABS, ESC, electronic parking brake, and hill-start assist light up. Usually, they don't light up when I start driving, but after a while, they do. I went to the repair shop to clear the fault codes once, but after driving 20 to 30 kilometers, they came on again. Does anyone know what the cause might be?

The dashboard reported low transmission performance, and then the car wouldn't accelerate. After restarting, the warning light went off and it drove normally. What could be the reason? (The onboard computer cleared the fault light, but it came back on before I got home.)

Hey folks, got a low oil warning and the next day it started making noise. Even after adding 4 liters of oil, it's still the same. Any idea why?

After cleaning the throttle body yourself, the engine warning light came on. It doesn't affect driving, but how can you resolve this?

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?

I drove for about an hour at night, and the battery warning light came on. Then I stopped driving. The next day, when I drove again, the warning light was off. Can you tell me what's going on and if it's serious? Thanks.

I have a Haima S5 with an automatic transmission, and occasionally the transmission warning light turns on. But when I press the brake, it goes off! When I try to read the error code, nothing shows up. What could be the reason?