Fault Family System: Powertrain (P-Codes) 10 SAE Codes

Charging Stop Start Switch Circuit

Diagnostic & Technical Explanation

Code P2D79 (Charging Stop Switch Circuit) covers the dash or charge-port switch the driver uses to manually stop or start a charge session, along with its performance and intermittent checks. The ECM flags an open, shorted, out-of-range, performance, or intermittent signal from either switch. Causes are a worn or stuck switch contact, a corroded connector at the switch, or chafed wiring in the console or charge-port harness run.

These 10 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 10 times.

Codes in this family (10)

Code	Definition	Repair coverage
P2D79	Charging Stop Switch Circuit	3 ranked fixes
P2D7A	Charging Stop Switch Circuit High	3 ranked fixes
P2D7B	Charging Stop Switch Circuit Low	3 ranked fixes
P2D7C	Charging Stop Switch Circuit Performance	3 ranked fixes
P2D7D	Charging Stop Switch Circuit Intermittent/Erratic	3 ranked fixes
P2D7E	Charging Start Switch Circuit	3 ranked fixes
P2D7F	Charging Start Switch Circuit High	3 ranked fixes
P2D80	Charging Start Switch Circuit Low	3 ranked fixes
P2D81	Charging Start Switch Circuit Performance	3 ranked fixes
P2D82	Charging Start Switch Circuit Intermittent/Erratic	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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