Check Engine Light Puzzle Is Your Car Really Okay?

My check engine light came on no weird noises. No change in how it's driving. I turned it on again today to go to work and it's still on. Still no weird noises ... It's been a year and a half since after he disabled the misfire codes, and my car is running fine. I have a 91oct tune as well but I almost ... Your Check Engine Light will pop up yellow if it's in need of service but still safe enough to drive on over to a service center. The check engine light primarily tests emissions control systems, not the overall state of engine. Though sometimes it can indicate a sensor failure that does ... Bad Ground or positive wire connections · Faulty starter motor – too much current draw · Weak battery or parasitic draw pulling battery down ... If there are no other symptoms, your check engine light may indicate a problem with your computer, a loose gas cap, transmission errors, or ... A check engine light usually means a sensor failed with the emissions system or something has gone wrong, and it was flagged. Yeah, the car can run fine. If the car seems normal, a broken oxygen sensor is the likely reason. This may mean that the vehicle is running normally, but because the engine isn't ... First, Rule Out or Resolve Any Issues · Loosened or damaged fuel cap · Failing oxygen (O2) sensor · Clogged or damaged catalytic converter · Malfunctioning Mass Air ... The Check Engine Light, often abbreviated as CEL, is a critical part of your vehicle's onboard diagnostics system. It's essentially your car's way of ...