Car Engine Light Codes
What are engine light codes?
Engine light codes are diagnostic trouble codes (DTCs) that are stored in your car’s computer when a problem is detected. These codes can help you identify the source of the problem and get it fixed.
How do I get the engine light codes?
There are a few ways to get the engine light codes from your car.
- Use an OBD-II scanner. This is a small device that plugs into your car’s diagnostic port and reads the codes. You can purchase an OBD-II scanner online or at most auto parts stores.
- Take your car to a mechanic. Most mechanics have the equipment to read engine light codes.
- Check your car’s manual. Some cars have a built-in feature that allows you to retrieve the engine light codes. Consult your manual for more information.
What do the engine light codes mean?
The meaning of engine light codes can vary depending on the make and model of your car. However, there are some common codes that you may see.
| Code | Meaning |
|---|---|
| P0101 | Mass air flow sensor circuit range/performance problem |
| P0102 | Mass air flow sensor circuit low input |
| P0103 | Mass air flow sensor circuit high input |
| P0141 | Oxygen sensor heater circuit malfunction (bank 1, sensor 2) |
| P0300 | Random/multiple cylinder misfire detected |
| P0420 | Catalyst system efficiency below threshold (bank 1) |
| P0701 | Transmission control system malfunction |
What should I do if my engine light is on?
If your engine light is on, it’s important to have it checked out by a mechanic as soon as possible. Driving with an engine light on can damage your car and could even be dangerous.
Here are a few things you can do to prepare for your visit to the mechanic:
- Write down the engine light codes.
- Note any symptoms that you’re experiencing, such as rough idling, poor performance, or increased fuel consumption.
- Gather any recent maintenance records.
Conclusion
Engine light codes are a valuable tool for diagnosing problems with your car. By understanding what the codes mean, you can be better prepared for your visit to the mechanic and get your car fixed as quickly as possible.
