P0E61: The charger's low-voltage enable circuit reports a hardware fault

P0E61 identifies battery charger A enable circuit/open. The 2018 GM HPC2/VICM table describes a fault check of the charger's 12 V enable circuit, using a hardware input/output fault flag.

The supported finding is broader than a confirmed broken wire

The row fails when that flag is true. It requires system voltage of at least 10.2 V, global diagnostic disable false and a flag state that is not indeterminate. Thirty failures among 40 samples at 25-millisecond intervals satisfy the listed one-second test. Reporting is Type B, two trips.

Although the generic label includes “open,” this source does not provide an open-circuit voltage band or isolate one physical mechanism. It supports saying that the enable line's hardware diagnostic reported a fault. It does not establish a charger DC output-voltage defect or a failed traction battery.

Preserve validity as well as the fault state

A flag that is indeterminate is different from a valid false result. Retain the enable-line status and low-voltage supply information when examining an intermittent charging complaint. The exact circuit procedure must identify what the controller's hardware flag represents on the vehicle.

After correction, verify a determinate, acceptable flag through an eligible evaluation and perform the prescribed charging checks. Do not apply external power to the enable line from this description. Charger access and any high-voltage work require qualified service and the vehicle-specific safety process.

Source and applicability

This explanation follows the documented GM monitor, not a verified application to every vehicle with this code. Confirm the vehicle, reporting module and calibration in current service information. GM diagnostic table, physical page 1012.