[Hog Caller]

Thank you both for your help.

Halleluiah, I found it. My atmospheric pressure sensor is located under the dash, near the glove box and the ECU. A new sensor cleared my #13 error code and fixed half my problem.

I still have an error code 15, Ignition Output Signal, and the engine still will not start. Voltages at the Igniter unit check OK per the Troubleshooting Flow Chart in my Honda Service Manual.

The error code 15 only shows after cranking the engine. After resetting the ECU, the error codes does not show again when the ignition switch is turned on, only after the engine is cranked. The troubleshooting flow chart says: “Intermittent failure, test drive may be necessary.” I surely would like to do a test drive, but the engine will not run.

Does anyone have any suggestions?

Thanks.