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Powertrain code references — Page 26.
Engine, transmission and powertrain diagnostic references. Exact vehicle and module context still matters.
Generic OBD-II
P0A4B
Generator position conversion loses signal or tracking
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Generic OBD-II
P0A4C
Generator angle data disagree inside the position-reading path
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Generic OBD-II
P0A4D
Internal generator rotor-position sensor low input
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Generic OBD-II
P0A4E
Internal generator rotor-position sensor high input
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Generic OBD-II
P0A4F
Generator Position Sensor Circuit Intermittent
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Generic OBD-II
P0A50
Generator position information reports overspeed
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Generic OBD-II
P0A51
Drive Motor A Current Sensor Circuit
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Generic OBD-II
P0A52
Drive Motor A Current Sensor Circuit Range/Performance
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Generic OBD-II
P0A53
Drive Motor A Current Sensor Circuit Low
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Generic OBD-II
P0A54
Drive Motor A Current Sensor Circuit High
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Generic OBD-II
P0A55
Drive Motor B Current Sensor Circuit
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Generic OBD-II
P0A56
Drive Motor B Current Sensor Circuit Range/Performance
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Generic OBD-II
P0A57
Drive Motor B Current Sensor Circuit Low
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Generic OBD-II
P0A58
Drive Motor B Current Sensor Circuit High
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Generic OBD-II
P0A59
Generator Current Sensor Circuit
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Generic OBD-II
P0A5A
Generator Current Sensor Circuit Range/Performance
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Generic OBD-II
P0A5B
Generator Current Sensor Circuit Low
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Generic OBD-II
P0A5C
Generator Current Sensor Circuit High
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Generic OBD-II
P0A5D
Drive Motor A Phase U Current
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Generic OBD-II
P0A5E
Drive motor A phase U current is below its expected peak
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Generic OBD-II
P0A5F
Drive Motor A Phase U Current High
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Generic OBD-II
P0A60
Maverick and Nautilus inverter-controller faults after startup
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Generic OBD-II
P0A61
Drive motor A phase V has too little current under command
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Generic OBD-II
P0A62
Drive Motor A Phase V Current High
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Generic OBD-II
P0A63
Drive Motor A Phase W Current
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Generic OBD-II
P0A64
Drive motor A phase W does not reach expected current
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Generic OBD-II
P0A65
Drive Motor A Phase W Current High
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Generic OBD-II
P0A66
Drive Motor B Phase U Current
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Generic OBD-II
P0A67
Drive motor B phase U current is low under active demand
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Generic OBD-II
P0A68
Drive Motor B Phase U Current High
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Generic OBD-II
P0A69
Drive Motor B Phase V Current
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Generic OBD-II
P0A6A
Drive motor B phase V lacks the expected peak current
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Generic OBD-II
P0A6B
Drive Motor B Phase V Current High
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Generic OBD-II
P0A6C
Drive Motor B Phase W Current
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Generic OBD-II
P0A6D
Drive motor B phase W current is insufficient near its peak
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Generic OBD-II
P0A6E
Drive Motor B Phase W Current High
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Generic OBD-II
P0A6F
Generator Phase U Current
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Generic OBD-II
P0A70
Generator Phase U Current Low
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Generic OBD-II
P0A71
Ford electrified no-start faults can begin with a 12-volt drop
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Generic OBD-II
P0A72
Generator Phase V Current
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Generic OBD-II
P0A73
Generator Phase V Current Low
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Generic OBD-II
P0A74
Generator Phase V Current High
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Generic OBD-II
P0A75
Generator Phase W Current
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Generic OBD-II
P0A76
Generator Phase W Current Low
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Generic OBD-II
P0A77
Generator Phase W Current High
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Generic OBD-II
P0A78
Motor-A inverter performance is tied to a semiconductor fault status
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Generic OBD-II
P0A79
Motor-B inverter performance reports a power-switch protection status
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Generic OBD-II
P0A7A
Generator inverter fault with an originating ISG diagnosis
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Generic OBD-II
P0A7B
Battery Energy Control Module Requested MIL Illumination
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Generic OBD-II
P0A7C
The monitored hot component is the electronics board
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Generic OBD-II
P0A7D
Ford hybrid battery discharge does not automatically mean pack replacement
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Generic OBD-II
P0A7E
Battery overtemperature is evaluated as an accumulated hot condition
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Generic OBD-II
P0A7F
battery deterioration is evaluated under qualified power conditions
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Generic OBD-II
P0A80
The GM battery-replacement label rests on a qualified resistance calculation
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Generic OBD-II
P0A81
Battery-fan failure uses different voltage checks for on and off commands
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Generic OBD-II
P0A82
Battery cooling fan commanded on but speed feedback stays low
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Generic OBD-II
P0A83
Battery cooling-fan speed persists after an off command
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Generic OBD-II
P0A84
Battery fan control feedback remains below its valid level
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Generic OBD-II
P0A85
Fan control feedback stays high despite a lower command
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Generic OBD-II
P0A86
14 Volt Power Module Current Sensor A Circuit
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Generic OBD-II
P0A87
Power-module current plausibility is tested in current-limit mode
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Generic OBD-II
P0A88
Low power-module current-sensor signal is not low charging current
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Generic OBD-II
P0A89
High current-sensor voltage differs from actual overcurrent
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Generic OBD-II
P0A8A
14 Volt Power Module Current Sensor A Circuit Intermittent
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Generic OBD-II
P0A8B
14 Volt Power Module System Voltage
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Generic OBD-II
P0A8C
14 Volt Power Module System Voltage Unstable
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Generic OBD-II
P0A8D
Low electrical supply during starting or i-stop restart
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Generic OBD-II
P0A8E
Power-module overvoltage has hardware and software routes
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Generic OBD-II
P0A8F
GM eAssist charging faults and high-current fuse connections
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Generic OBD-II
P0A90
Drive Motor A Performance
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Generic OBD-II
P0A91
Drive Motor B Performance
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Generic OBD-II
P0A92
Belt-driven generator speed disagrees with its prediction
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Generic OBD-II
P0A93
Ford DCACA inverter message with the exact 96 suffix
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Generic OBD-II
P0A94
DC-DC converter boost response during i-stop operation
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Generic OBD-II
P0A95
The battery controller infers a fuse problem from voltage difference
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Generic OBD-II
P0A96
Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit/Open
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Generic OBD-II
P0A97
Hybrid/EV Battery Pack Cooling Fan 2 Performance/Stuck Off
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Generic OBD-II
P0A98
Hybrid/EV Battery Pack Cooling Fan 2 Stuck On
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Generic OBD-II
P0A99
Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit Low
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Generic OBD-II
P0A9A
Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit High
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Generic OBD-II
P0A9B
Hybrid/EV Battery Temperature Sensor A Circuit
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Generic OBD-II
P0A9C
Battery sensor one is compared with all three other temperature inputs
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Generic OBD-II
P0A9D
Battery sensor one reads excessively hot while another input remains cooler
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Generic OBD-II
P0A9E
An extreme cold reading identifies battery sensor-one circuit high
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Generic OBD-II
P0A9F
Battery temperature sensor A changes erratically
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Generic OBD-II
P0AA0
Hybrid/EV Battery Positive Contactor Circuit
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Generic OBD-II
P0AA1
Battery contactor appears to remain conductive after opening
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Generic OBD-II
P0AA2
A close command does not produce the required contactor status
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Generic OBD-II
P0AA3
Hybrid/EV Battery Negative Contactor Circuit
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Generic OBD-II
P0AA4
Mach-E and E-Transit faults after junction-box replacement
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Generic OBD-II
P0AA5
Hybrid/EV Battery Negative Contactor Circuit Stuck Open
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Generic OBD-II
P0AA6
battery isolation resistance is too low under the test state
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Generic OBD-II
P0AA7
The battery isolation measurement switch is being checked
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Generic OBD-II
P0AA8
Two isolation readings must agree with pack voltage
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Generic OBD-II
P0AA9
Isolation sensor voltage is below its permitted range
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Generic OBD-II
P0AAA
Isolation sensor voltage exceeds the documented range
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Generic OBD-II
P0AAB
Hybrid/EV Battery Voltage Isolation Sensor Circuit Intermittent/Erratic
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Generic OBD-II
P0AAC
Hybrid/EV Battery Pack Air Temperature Sensor A Circuit
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Generic OBD-II
P0AAD
Battery inlet-air plausibility is a qualified cold-start comparison
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Generic OBD-II
P0AAE
Battery inlet-air circuit low is expressed as a hot indicated value
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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.