Fault Family System: Powertrain (P-Codes) 7 SAE Codes

Control Pilot Circuit

Diagnostic & Technical Explanation

Code P0CF3 sets when the control module detects an implausible PWM duty cycle or voltage level on the control pilot (J1772) signal — the EVSE's available-current announcement does not match what the charging control module expects or can decode. The most common physical causes are a corroded or loose connection at the charge inlet's pilot pin, chafed low-voltage pilot wiring between the inlet and the charging control module, and an EVSE-side fault such as a failed pilot oscillator that is outside the vehicle but still reported through this circuit. Because the pilot signal is a 12V-referenced communication line, no HV lockout is needed to diagnose it.

These 7 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 7 times.

Codes in this family (7)

Code	Definition	Repair coverage
P0CF3	Control Pilot Circuit /Open	3 ranked fixes
P0CF4	Control Pilot Circuit Range/Performance	3 ranked fixes
P0CF5	Control Pilot Circuit Low	3 ranked fixes
P0CF6	Control Pilot Circuit High	3 ranked fixes
P0CF7	Control Pilot Circuit Intermittent/Erratic	3 ranked fixes
P0E72	Control Pilot Signal Low Frequency	3 ranked fixes
P0E73	Control Pilot Signal High Frequency	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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