Check engine light on, horn sticks

Good evening.

The horn may be the horn pad on the steering wheel. Common problem for this issue.

The check engine light stores a fault code in the system. You need to get the code so we can help.

Roy

The provision for communicating is the Data Link Connector (DLC) (refer to Figure). It is usually located under the instrument panel and is sometimes covered by a plastic cover labeled "DIAGNOSTIC CONNECTOR." It is used in the assembly plant to receive information in checking that the engine is operating properly before it leaves the plant. The connector can also be used by the service technician to identify stored trouble codes.

Flashing Diagnostic Trouble Codes With 12 Pin DLC Connector (Pin "B" Included)
Although it is recommended that a diagnostic scan tool be used to read diagnostic trouble codes, it may be possible to flash trouble codes on certain vehicles equipped with a 12 pin DLC connector. The DLC connector terminal "B" (diagnostic terminal, if equipped) is the second terminal from the right of the DLC connector's top row. The terminal is grounded by connecting it to terminal "A" (internal ECM/PCM/VCM ground), the terminal to the right of terminal "B" on the top row of the DLC connector.

Once terminals "A" and "B" have been connected, the ignition switch must be moved to the "ON" position, with the engine riot running. At this point, the MIL (Service Engine Soon) should flash Diagnostic Trouble Code (DTC) 12 three times consecutively. This would be the following flash sequence: "flash, pause. Flash-flash, long pause, flash, pause, flash-flash, long pause, flash, pause, flash-flash." DTC 12 indicates that the diagnostic system is operating. If DTC 12 is not indicated, a problem is present within the diagnostic system itself, and should be referred to the appropriate diagnostic chart.

Following the output of DTC 12, the MIL (Service Engine Soon) will indicate a diagnostic trouble code three times if a diagnostic trouble code is present, or it will continue to output DTC 12. If more than one diagnostic trouble code has been stored in memory, the diagnostic trouble codes will be output from the lowest to the highest, with each diagnostic trouble code being displayed three times.