Power warning on your vehicle? U3504 means Control Module Input Power B circuit out of range—loss of function. Scan, test, reprogram or replace the module.

Intermittent Control Module Input A power loss in your vehicle? It can cause electronic failures—scan, test the circuit, then reprogram or replace module.

Electrical glitches or warning lights on your vehicle? High voltage on Control Module Input Power A can damage the module—scan, test wiring, reprogram.

Dim lights or dead accessories on your vehicle? U3501 = Control Module Input Power A Circuit Low—could disable systems. Scan and reprogram the module now.

Power loss to control modules on your vehicle? U3500 = Control Module Input Power A circuit out of range—risking failures. Scan, reprogram or replace now.

U3036 code shows communication authentication signal performance failure on your vehicle. It can stop module functions. Scan, re‑program or replace now.

Your vehicle shows a U3035 communication error. Invalid authentication data can stop safety modules, so scan the network and reprogram or replace module.

U3034 shows a missing/invalid communication key—module authentication lost, creating security risk and shutdown. Scan, verify certificate, immediate rep...

Security light flashes and key won’t start on your vehicle – missing/invalid control module certificate disables ignition. Scan U3033, reprogram module.

Your vehicle’s accessories stay off when you turn the key—loss of power to lights and windows. Scan U3032, test ignition output, and quickly reprogram.