P CODE FAMILY
Powertrain code references — Page 15.
Engine, transmission and powertrain diagnostic references. Exact vehicle and module context still matters.
Generic OBD-II
P057C
low brake-position samples and the zero-position fallback
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Generic OBD-II
P057D
a high brake-position input may represent an open circuit
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Generic OBD-II
P057E
erratic brake-position data needs a signal history
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Generic OBD-II
P057F
Battery deterioration monitoring and a missed battery initialization
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Generic OBD-II
P0580
low cruise-switch voltage is architecture dependent
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Generic OBD-II
P0581
high cruise-switch input and a misleading table phrase
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Generic OBD-II
P0582
Cruise Control Vacuum Control Circuit/Open
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Generic OBD-II
P0583
Cruise Control Vacuum Control Circuit Low
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Generic OBD-II
P0584
Cruise Control Vacuum Control Circuit High
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Generic OBD-II
P0585
Cruise Control Multi-Function Input A/B Correlation
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Generic OBD-II
P0586
Cruise Control Vent Control Circuit/Open
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Generic OBD-II
P0587
Cruise Control Vent Control Circuit Low
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Generic OBD-II
P0588
Cruise Control Vent Control Circuit High
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Generic OBD-II
P0589
cruise switch B sits between recognized input ranges
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Generic OBD-II
P058A
battery-monitor internal checks, not a battery-capacity verdict
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Generic OBD-II
P058B
current-monitor performance includes stored sleep-time evidence
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Generic OBD-II
P058C
two internal battery temperatures disagree
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Generic OBD-II
P058D
battery voltage disagrees with the controller reference
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Generic OBD-II
P058E
the battery sensor reports an excessively high internal temperature
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Generic OBD-II
P058F
an extremely low battery-monitor temperature report
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Generic OBD-II
P0590
Cruise Control Multi-Function Input B Circuit Stuck
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Generic OBD-II
P0591
Cruise Control Multi-Function Input B Circuit Range/Performance
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Generic OBD-II
P0592
cruise switch B input in the short-to-ground range
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Generic OBD-II
P0593
cruise switch B input in the short-to-power band
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Generic OBD-II
P0594
Cruise Control Servo Control Circuit/Open
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Generic OBD-II
P0595
Cruise Control Servo Control Circuit Low
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Generic OBD-II
P0596
Cruise Control Servo Control Circuit High
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Generic OBD-II
P0597
Thermostat heater open-circuit classification uses driver status
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Generic OBD-II
P0598
Thermostat heater ground-short status is distinct from an open circuit
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Generic OBD-II
P0599
Thermostat heater circuit remains high in the commanded state
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Generic OBD-II
P059A
Tucson active-air-flap warning traced to sensor solder connections
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Generic OBD-II
P059B
Active Grille Air Shutter A Position Sensor Circuit Range/Performance
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Generic OBD-II
P059C
Active Grille Air Shutter A Position Sensor Circuit High
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Generic OBD-II
P059D
Active Grille Air Shutter A Position Sensor Circuit Low
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Generic OBD-II
P059E
Active Grille Air Shutter A Position Sensor Circuit Intermittent
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Generic OBD-II
P059F
grille-shutter performance uses a retry strategy
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Generic OBD-II
P05A0
Mazda shutter faults from temporary obstruction or cold-weather logic
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Generic OBD-II
P05A1
Grille shutter A endstop diagnosis changes between learning and normal operation
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Generic OBD-II
P05A2
Grille shutter A open-circuit diagnosis includes timed coil checks
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Generic OBD-II
P05A3
Active grille shutter actuator internal fault
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Generic OBD-II
P05A4
Active Grille Air Shutter A Control Circuit High
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Generic OBD-II
P05A5
Active Grille Air Shutter A Control Circuit Low
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Generic OBD-II
P05A6
Active Grille Air Shutter A Supply Voltage Circuit/Open
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Generic OBD-II
P05A7
Grille shutter A reports its internal supply below the allowed level
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Generic OBD-II
P05A8
Active Grille Air Shutter A Supply Voltage Circuit High
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Generic OBD-II
P05A9
Active Grille Air Shutter B Position Sensor Circuit
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Generic OBD-II
P05AA
Active Grille Air Shutter B Position Sensor Circuit Range/Performance
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Generic OBD-II
P05AB
Active Grille Air Shutter B Position Sensor Circuit High
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Generic OBD-II
P05AC
Active Grille Air Shutter B Position Sensor Circuit Low
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Generic OBD-II
P05AD
Active Grille Air Shutter B Position Sensor Circuit Intermittent
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Generic OBD-II
P05AE
shutter B fails commanded-position retries
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Generic OBD-II
P05AF
Active Grille Air Shutter B Stuck On
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Generic OBD-II
P05B0
Why grille shutter B endstop learning changes the diagnosis
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Generic OBD-II
P05B1
The movement-timed coil checks behind grille shutter B faults
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Generic OBD-II
P05B2
Niro air-flap B performance and judgment-logic verification
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Generic OBD-II
P05B3
Active Grille Air Shutter B Control Circuit High
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Generic OBD-II
P05B4
Active Grille Air Shutter B Control Circuit Low
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Generic OBD-II
P05B5
Active Grille Air Shutter B Supply Voltage Circuit/Open
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Generic OBD-II
P05B6
Why grille shutter B can report low internal voltage with normal battery voltage
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Generic OBD-II
P05B7
Active Grille Air Shutter B Supply Voltage Circuit High
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Generic OBD-II
P05B8
Restraint Deployment Signal Circuit/Open
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Generic OBD-II
P05B9
Restraint Deployment Signal Circuit Low
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Generic OBD-II
P05BA
Restraint Deployment Signal Circuit High
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Generic OBD-II
P05BB
Restraints Deployed
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Generic OBD-II
P05BC
Stop-Start Mode Switch Circuit/Open
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Generic OBD-II
P05BD
Ram stop-start switch faults versus the ignition module
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Generic OBD-II
P05BE
Stop-Start Mode Switch Circuit Low
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Generic OBD-II
P05BF
Stop-Start Mode Switch Circuit High
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Generic OBD-II
P05C0
What grille shutter A overtemperature actually measures
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Generic OBD-II
P05C1
Keep grille shutter B thermal faults separate from its other subtypes
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Generic OBD-II
P05C2
Engine Coolant Pressure Sensor Circuit
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Generic OBD-II
P05C3
Engine Coolant Pressure Sensor Circuit Range/Performance
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Generic OBD-II
P05C4
Coolant water-pressure sensor circuit low input
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Generic OBD-II
P05C5
Coolant pressure-sensor circuit high and missing ground possibilities
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Generic OBD-II
P05C6
Engine Coolant Pressure Sensor Circuit Intermittent/Erratic
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Generic OBD-II
P05C7
Economy Mode Switch Circuit/Open
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Generic OBD-II
P05C8
Economy Mode Switch Circuit Range/Performance
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Generic OBD-II
P05C9
Economy Mode Switch Circuit Low
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Generic OBD-II
P05CA
Economy Mode Switch Circuit High
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Generic OBD-II
P05CB
Vehicle Hardware Incompatibility
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Generic OBD-II
P05CC
Cold-start intake timing is compared only during a stable warmup command
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Generic OBD-II
P05CD
Bank-2 intake cam timing fails the cold-start comparison
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Generic OBD-II
P05CE
Exhaust cam error during catalyst warmup needs its own timing window
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Generic OBD-II
P05CF
Bank-2 exhaust cam timing fails during cold start
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Generic OBD-II
P05D0
Driver Mode Select Switch A Circuit
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Generic OBD-II
P05D1
driver-mode switch bank 1 input below its low threshold
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Generic OBD-II
P05D2
driver-mode switch voltage exceeds the documented high limit
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Generic OBD-II
P05D3
driver-mode switch voltage lands between recognized states
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Generic OBD-II
P05D4
Driver Mode Select Switch B Circuit
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Generic OBD-II
P05D5
Driver Mode Select Switch B Circuit Low
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Generic OBD-II
P05D6
Driver Mode Select Switch B Circuit High
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Generic OBD-II
P05D7
Driver Mode Select Switch B Range/Performance
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Generic OBD-II
P05D8
PCV Regulator Valve Control Circuit/Open
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Generic OBD-II
P05D9
PCV Regulator Valve Control Circuit Low
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Generic OBD-II
P05DA
PCV Regulator Valve Control Circuit High
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Generic OBD-II
P05DB
Brake Pedal Position Sensor B Circuit/Open
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Generic OBD-II
P05DC
GM brake-pedal B range and PWM performance
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Generic OBD-II
P05DD
GM brake-pedal B signal stuck low
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Generic OBD-II
P05DE
GM brake-pedal signal B stuck high
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Generic OBD-II
P05DF
GM brake-pedal B signal changes implausibly fast
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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.