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THE CODE DIRECTORY

Diagnostic code references — Page 92.

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

11,786 code references

Generic OBD-II
P28A2

Cylinder 5 Ion Current Sense Circuit Low

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Generic OBD-II
P28A3

Cylinder 5 Ion Current Sense Circuit High

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Generic OBD-II
P28A4

Cylinder 6 Ion Current Sense Circuit

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Generic OBD-II
P28A5

Cylinder 6 Ion Current Sense Circuit Range/Performance

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Generic OBD-II
P28A6

Cylinder 6 Ion Current Sense Circuit Low

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Generic OBD-II
P28A7

Cylinder 6 Ion Current Sense Circuit High

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Generic OBD-II
P28A8

Cylinder 7 Ion Current Sense Circuit

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Generic OBD-II
P28A9

Cylinder 7 Ion Current Sense Circuit Range/Performance

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Generic OBD-II
P28AA

Cylinder 7 Ion Current Sense Circuit Low

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Generic OBD-II
P28AB

Cylinder 7 Ion Current Sense Circuit High

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Generic OBD-II
P28AC

Cylinder 8 Ion Current Sense Circuit

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Generic OBD-II
P28AD

Cylinder 8 Ion Current Sense Circuit Range/Performance

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Generic OBD-II
P28AE

Cylinder 8 Ion Current Sense Circuit Low

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Generic OBD-II
P28AF

Cylinder 8 Ion Current Sense Circuit High

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Generic OBD-II
P28B0

Cylinder 9 Ion Current Sense Circuit

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Generic OBD-II
P28B1

Cylinder 9 Ion Current Sense Circuit Range/Performance

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Generic OBD-II
P28B2

Cylinder 9 Ion Current Sense Circuit Low

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Generic OBD-II
P28B3

Cylinder 9 Ion Current Sense Circuit High

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Generic OBD-II
P28B4

Cylinder 10 Ion Current Sense Circuit

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Generic OBD-II
P28B5

Cylinder 10 Ion Current Sense Circuit Range/Performance

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Generic OBD-II
P28B6

Cylinder 10 Ion Current Sense Circuit Low

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Generic OBD-II
P28B7

Cylinder 10 Ion Current Sense Circuit High

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Generic OBD-II
P28B8

Cylinder 11 Ion Current Sense Circuit

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Generic OBD-II
P28B9

Cylinder 11 Ion Current Sense Circuit Range/Performance

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Generic OBD-II
P28BA

Cylinder 11 Ion Current Sense Circuit Low

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Generic OBD-II
P28BB

Cylinder 11 Ion Current Sense Circuit High

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Generic OBD-II
P28BC

Cylinder 12 Ion Current Sense Circuit

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Generic OBD-II
P28BD

Cylinder 12 Ion Current Sense Circuit Range/Performance

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Generic OBD-II
P28BE

Cylinder 12 Ion Current Sense Circuit Low

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Generic OBD-II
P28BF

Cylinder 12 Ion Current Sense Circuit High

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Generic OBD-II
P28C0

Ion Sense Module Supply Voltage Circuit

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Generic OBD-II
P28C1

Ion Sense Module Supply Voltage Low

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Generic OBD-II
P28C2

Ion Sense Module Supply Voltage High

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Generic OBD-II
P28C3

EVAP System High Load Purge Line B Performance

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Generic OBD-II
P28C4

Clutch A Motor Phase U-V-W Circuit Low

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Generic OBD-II
P28C5

Clutch A Motor Phase U-V-W Circuit High

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Generic OBD-II
P28C6

Clutch A Motor Phase U-V-W Circuit/Open

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Generic OBD-II
P28C7

Clutch A Motor Phase U-V-W Performance

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Generic OBD-II
P28C8

Clutch A Pump Motor Performance

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Generic OBD-II
P28C9

Clutch A Motor Overspeed

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Generic OBD-II
P28CA

Clutch A Motor Underspeed

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Generic OBD-II
P28CB

Clutch A Motor Position Sensor Circuit/Open

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Generic OBD-II
P28CC

Clutch A Motor Position Sensor Circuit Range/Performance

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Generic OBD-II
P28CD

Clutch A Pressure Sensor Circuit/Open

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Generic OBD-II
P28CE

Clutch A Pressure Sensor Circuit Low

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Generic OBD-II
P28CF

Clutch A Pressure Sensor Circuit High

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Generic OBD-II
P28D0

Clutch A Pressure Sensor Circuit Range/Performance

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Generic OBD-II
P28D1

Clutch A Motor Driver Current/Temperature Too High

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Generic OBD-II
P28D2

Clutch B Motor Phase U-V-W Circuit Low

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Generic OBD-II
P28D3

Clutch B Motor Phase U-V-W Circuit High

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Generic OBD-II
P28D4

Clutch B Motor Phase U-V-W Circuit/Open

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Generic OBD-II
P28D5

Clutch B Motor Phase U-V-W Performance

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Generic OBD-II
P28D6

Clutch B Motor Driver Current/Temperature Too High

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Generic OBD-II
P28D7

Clutch B Pump Motor Performance

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Generic OBD-II
P28D8

Clutch B Motor Overspeed

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Generic OBD-II
P28D9

Clutch B Motor Underspeed

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Generic OBD-II
P28DA

Clutch B Motor Position Sensor Circuit/Open

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Generic OBD-II
P28DB

Clutch B Motor Position Sensor Circuit Range/Performance

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Generic OBD-II
P28DC

Clutch B Pressure Sensor Circuit/Open

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Generic OBD-II
P28DD

Clutch B Pressure Sensor Circuit Low

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Generic OBD-II
P28DE

Clutch B Pressure Sensor Circuit High

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Generic OBD-II
P28DF

Clutch B Pressure Sensor Circuit Range/Performance

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Generic OBD-II
P28E0

Shift Motor Phase U-V-W Circuit Low

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Generic OBD-II
P28E1

Shift Motor Phase U-V-W Circuit High

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Generic OBD-II
P28E2

Shift Motor Phase U-V-W Circuit/Open

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Generic OBD-II
P28E3

Shift Motor Phase U-V-W Performance

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Generic OBD-II
P28E4

Shift Motor Driver Current/Temperature Too High

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Generic OBD-II
P28E5

Shift Motor Performance

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Generic OBD-II
P28E6

Shift Motor Overspeed

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Generic OBD-II
P28E7

Shift Motor Position Sensor Circuit/Open

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Generic OBD-II
P28E8

Shift Motor Position Sensor Circuit High

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Generic OBD-II
P28E9

Shift Motor Position Sensor Circuit Low

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Generic OBD-II
P28EA

Shift Motor Position Sensor Circuit Range/Performance

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Generic OBD-II
P28EB

Shift Motor Position Not Learned

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Generic OBD-II
P28EC

Shift Motor Position Sensor Exceeded Learning Limit

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Generic OBD-II
P28ED

Electric/Auxiliary Transmission Fluid Pump B Overspeed

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Generic OBD-II
P28EE

Electric/Auxiliary Transmission Fluid Pump B Underspeed

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Generic OBD-II
P28EF

Engine Disconnect Clutch Actuator Performance/Stuck Off

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Generic OBD-II
P28F0

Engine Disconnect Clutch Actuator Stuck On

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Generic OBD-II
P28F1

Engine Disconnect Clutch Pressure Sensor Circuit

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Generic OBD-II
P28F2

Engine Disconnect Clutch Pressure Sensor Circuit Range/Performance

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Generic OBD-II
P28F3

Engine Disconnect Clutch Pressure Sensor Circuit Low

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Generic OBD-II
P28F4

Engine Disconnect Clutch Pressure Sensor Circuit High

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Generic OBD-II
P28F5

Engine Disconnect Clutch Pressure Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P28F6

Engine Disconnect Clutch Actuator Circuit Intermittent

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Generic OBD-II
P28F7

Exhaust Pressure Too High Bank 1

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Generic OBD-II
P28F8

Exhaust Pressure Too High Bank 2

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Generic OBD-II
P28F9

Exhaust Pressure Too Low Bank 1

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Generic OBD-II
P28FA

Exhaust Pressure Too Low Bank 2

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Generic OBD-II
P2A00

O2 Sensor Circuit Range/Performance Bank 1 Sensor 1

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Generic OBD-II
P2A01

O2 Sensor Circuit Range/Performance Bank 1 Sensor 2

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Generic OBD-II
P2A02

O2 Sensor Circuit Range/Performance Bank 1 Sensor 3

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Generic OBD-II
P2A03

O2 Sensor Circuit Range/Performance Bank 2 Sensor 1

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Generic OBD-II
P2A04

O2 Sensor Circuit Range/Performance Bank 2 Sensor 2

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Generic OBD-II
P2A05

O2 Sensor Circuit Range/Performance Bank 2 Sensor 3

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Generic OBD-II
P2A06

O2 Sensor Negative Voltage Bank 1 Sensor 1

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Generic OBD-II
P2A07

O2 Sensor Negative Voltage Bank 1 Sensor 2

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Generic OBD-II
P2A08

O2 Sensor Negative Voltage Bank 1 Sensor 3

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Generic OBD-II
P2A09

O2 Sensor Negative Voltage Bank 2 Sensor 1

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Generic OBD-II
P2A0A

Manifold Absolute Pressure Sensor B Circuit

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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.