THE CODE DIRECTORY

Diagnostic code references — Page 33.

Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.

Generic OBD-II

P0A6C

These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.

Drive Motor B Phase W Current

Drive motor B phase W current is insufficient near its peak

Drive Motor B Phase W Current High

Generator Phase U Current

Generator Phase U Current Low

Ford electrified no-start faults can begin with a 12-volt drop

Generator Phase V Current

Generator Phase V Current Low

Generator Phase V Current High

Generator Phase W Current

Generator Phase W Current Low

Generator Phase W Current High

Motor-A inverter performance is tied to a semiconductor fault status

Motor-B inverter performance reports a power-switch protection status

Generator inverter fault with an originating ISG diagnosis

Battery Energy Control Module Requested MIL Illumination

The monitored hot component is the electronics board

Ford hybrid battery discharge does not automatically mean pack replacement

Battery overtemperature is evaluated as an accumulated hot condition

battery deterioration is evaluated under qualified power conditions

The GM battery-replacement label rests on a qualified resistance calculation

Battery-fan failure uses different voltage checks for on and off commands

Battery cooling fan commanded on but speed feedback stays low

Battery cooling-fan speed persists after an off command

Battery fan control feedback remains below its valid level

Fan control feedback stays high despite a lower command

14 Volt Power Module Current Sensor A Circuit

Power-module current plausibility is tested in current-limit mode

Low power-module current-sensor signal is not low charging current

High current-sensor voltage differs from actual overcurrent

14 Volt Power Module Current Sensor A Circuit Intermittent

14 Volt Power Module System Voltage

14 Volt Power Module System Voltage Unstable

Low electrical supply during starting or i-stop restart

Power-module overvoltage has hardware and software routes

GM eAssist charging faults and high-current fuse connections

Drive Motor A Performance

Drive Motor B Performance

Belt-driven generator speed disagrees with its prediction

Ford DCACA inverter message with the exact 96 suffix

DC-DC converter boost response during i-stop operation

The battery controller infers a fuse problem from voltage difference

Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit/Open

Hybrid/EV Battery Pack Cooling Fan 2 Performance/Stuck Off

Hybrid/EV Battery Pack Cooling Fan 2 Stuck On

Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit Low

Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit High

Hybrid/EV Battery Temperature Sensor A Circuit

Battery sensor one is compared with all three other temperature inputs

Battery sensor one reads excessively hot while another input remains cooler

An extreme cold reading identifies battery sensor-one circuit high

Battery temperature sensor A changes erratically

Hybrid/EV Battery Positive Contactor Circuit

Battery contactor appears to remain conductive after opening

A close command does not produce the required contactor status

Hybrid/EV Battery Negative Contactor Circuit

Mach-E and E-Transit faults after junction-box replacement

Hybrid/EV Battery Negative Contactor Circuit Stuck Open

battery isolation resistance is too low under the test state

The battery isolation measurement switch is being checked

Two isolation readings must agree with pack voltage

Isolation sensor voltage is below its permitted range

Isolation sensor voltage exceeds the documented range

Hybrid/EV Battery Voltage Isolation Sensor Circuit Intermittent/Erratic

Hybrid/EV Battery Pack Air Temperature Sensor A Circuit

Battery inlet-air plausibility is a qualified cold-start comparison

Battery inlet-air circuit low is expressed as a hot indicated value

Very cold inlet-air data can be the battery sensor’s high-circuit fault

Hybrid/EV Battery Pack Air Temperature Sensor A Circuit Intermittent/Erratic

Hybrid/EV Battery Pack Air Temperature Sensor B Circuit

Outlet air is checked against the battery’s hottest module with the fan on

Battery outlet circuit low includes a cooler-module reference

The battery outlet sensor has an absolute cold-limit check

Hybrid/EV Battery Pack Air Temperature Sensor B Circuit Intermittent/Erratic

Active mount B open-circuit evidence belongs to the B control path

A low mount B circuit result needs its exact channel and failure type

Mount B circuit high is a controller-reported electrical category

This hybrid-performance entry describes a failed automatic engine transition

Hybrid/EV Battery Pack Voltage Sense A Circuit

Pack voltage must agree with the sum of its block measurements