Understanding When Your Check Engine Light Comes On Then Goes Off
When your check engine light comes on and then goes off, it can be a bit confusing. However, it's important to understand that this situation can have various causes and implications. Here are some possible reasons for your check engine light coming on and then going off:
Temporary Issue
Sometimes the check engine light can come on due to a temporary issue such as a loose gas cap or a momentary sensor glitch. In such cases, the light may turn off on its own once the issue resolves itself. This is often a minor problem, but it's worth monitoring your vehicle to ensure no further issues arise.
Interruption in Issue
Certain problems in your vehicle may not trigger the check engine light consistently. For example, if there is an intermittent issue with a sensor or a minor engine misfire, the light may come on and then go off as the problem occurs and resolves intermittently. This can be frustrating, but it's essential to keep an eye on the situation in case the issues persist.
Pending Trouble Codes
Even if the check engine light is no longer on, there may still be pending trouble codes stored in your vehicle's onboard computer. These codes can provide valuable information about potential issues that may need attention. It's recommended to have the diagnostic trouble codes checked even if the light is no longer illuminated. This can help identify any underlying issues that may require attention to prevent further damage or potential breakdowns.
Why You Shouldn't Ignore the Light
While it may seem like a good thing that the check engine light has turned off, it's important not to ignore the situation. It's always a good idea to have your vehicle checked by a qualified mechanic or use an OBD II scanner to retrieve any stored trouble codes. This will help identify any underlying issues that may require attention to prevent further damage or potential breakdowns.
Possible Causes and Solutions
One of many possible reasons is a low oil level, particularly if the light flickers on while cornering. The minimal low oil is thrown sideways while cornering, so the pick tube is left high and dry momentarily, and the light comes on warning you of low pressure for a couple of seconds. Once the car is straight again, the tube picks up oil again. Check the oil and top up if necessary. Of course, if it's leaking or burning a lot of oil, then it needs further investigation, but if you've just neglected checking, then all is well.
There are other possibilities, of course, some serious, some not. It's always a good idea to consult a professional if you're unsure about any issues with your vehicle.