Why Does Check Engine Light Come On When It Rains

This light is the centerpiece of your vehicle s on board diagnostics system obd. We worked on a ford truck once that triggered the check engine light every time it rained. The orange check engine light is a car s way of telling you something is wrong.

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I haven t noticed a real difference in the performance when i m driving but we had a bad storm last night and it will not start this morning.

Why does check engine light come on when it rains. My check engine light comes on when there is high humidity or when it rains and will usually go back off after it is dry. I own a repair shop and i have a truck that has a 4 3 engine in it im betting yours is the same and mine was doing it on me i had to replace the the coil on it somehow it was getting wet or drawing moisture on it and it would make the check engine light come on after i replaced it i never had any problems out of it yours could be a different sensor causing it what you need to do is check. Pull over tighten it and take a look at the cap to see if it. After a lot of diagnosis we found water that was dripping onto a spark plug wire then running down the wire to the engine s head causing an occasional short.

It should never be ignored. When it does you can expect to see the check engine light. Here are the 10 most common issues that trigger it. If your car isn t feeling jerky or strange when the check engine light comes on the first thing you should check is the gas cap.

Since the 1980s many vehicles have been built to be run by the engine computer unit ecu which controls vehicle s drivetrain and auxiliary systems based on input from the vehicle s sensors this computer will make adjustments to your vehicle s performance to keep your ride running smoothly. I m pretty convinced that it is weather related.