Help! Code P16A
Thread Starter
Cruising
Joined: Aug 2025
Posts: 14
Likes: 1
From: Kansas
Help! Code P16A
Hello everyone. The saga of putting my engine theft 19' Z06 rages on. I can't seem to track down this code of P16A1. Sensor Communication Circuit High Voltage (System 00) Test not passed since DTC cleared, test failed since DTC Clear, History DTC, Test not passed since Power Up. Have already done all the procedural checks that this code calls for, and still the same code. Checked grounds, plugs, all the ECM, TCM, and BCM connections as well. All advice welcome, this car does have a new GM alternator on it.
Thread Starter
Cruising
Joined: Aug 2025
Posts: 14
Likes: 1
From: Kansas
Good news. After having a professional electrical diagnostic service stop by and do a deeper dive into this code. It unraveled ABS codes and the need to program all kinds of systems. It is now a happy camper and is heading to the tuner on Monday to complete the upgrades and have the bumper installed. Then off to detail, and then I will present my 7-month ongoing project in all its glory. Thank you for all the helpful insights and technical data. I truly appreciate this forum and the broader Corvette community. Pictures coming soon.
