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THE CODE DIRECTORY

Diagnostic code references — Page 94.

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

11,786 code references

Generic OBD-II
P2A6F

Alternative Fuel Rail Pressure Regulator Inlet Pressure Too High

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Generic OBD-II
P2A70

Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit

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Generic OBD-II
P2A71

Alternative Fuel Hydraulic Fuel Pump Select Valve Control Range/Performance

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Generic OBD-II
P2A72

Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit Low

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Generic OBD-II
P2A73

Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit High

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Generic OBD-II
P2A74

Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit Intermittent/Erratic

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Generic OBD-II
P2A75

Alternative Fuel Hydraulic Pump Pressure Sensor Circuit

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Generic OBD-II
P2A76

Alternative Fuel Hydraulic Pump Pressure Sensor Range/Performance

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Generic OBD-II
P2A77

Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Low

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Generic OBD-II
P2A78

Alternative Fuel Hydraulic Pump Pressure Sensor Circuit High

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Generic OBD-II
P2A79

Alternative Fuel Hydraulic Pump Pressure Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P2A7A

Alternative Fuel Hydraulic Pressure Sensor Circuit

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Generic OBD-II
P2A7B

Alternative Fuel Hydraulic Pressure Sensor Range/Performance

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Generic OBD-II
P2A7C

Alternative Fuel Hydraulic Pressure Sensor Circuit Low

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Generic OBD-II
P2A7D

Alternative Fuel Hydraulic Pressure Sensor Circuit High

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Generic OBD-II
P2A7E

Alternative Fuel Hydraulic Pressure Sensor Circuit Intermitttent/Erratic

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Generic OBD-II
P2A7F

Alternative Fuel Pump A Compression Stroke Valve Control Circuit/Open

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Generic OBD-II
P2A80

Alternative Fuel Pump A Compression Stroke Valve Control Circuit Range/Performance

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Generic OBD-II
P2A81

Alternative Fuel Pump A Compression Stroke Valve Control Circuit Low

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Generic OBD-II
P2A82

Alternative Fuel Pump A Compression Stroke Valve Control Circuit High

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Generic OBD-II
P2A83

Alternative Fuel Pump B Compression Stroke Valve Control Circuit/Open

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Generic OBD-II
P2A84

Alternative Fuel Pump B Compression Stroke Valve Control Circuit Range/Performance

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Generic OBD-II
P2A85

Alternative Fuel Pump B Compression Stroke Valve Control Circuit Low

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Generic OBD-II
P2A86

Alternative Fuel Pump B Compression Stroke Valve Control Circuit High

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Generic OBD-II
P2A87

Alternative Fuel Pump C Compression Stroke Valve Control Circuit/Open

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Generic OBD-II
P2A88

Alternative Fuel Pump C Compression Stroke Valve Control Circuit Range/Performance

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Generic OBD-II
P2A89

Alternative Fuel Pump C Compression Stroke Valve Control Circuit Low

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Generic OBD-II
P2A8A

Alternative Fuel Pump C Compression Stroke Valve Control Circuit High

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Generic OBD-II
P2A8B

Alternative Fuel Vaporizer A Performance

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Generic OBD-II
P2A8C

Alternative Fuel Vaporizer B Performance

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Generic OBD-II
P2A8D

Alternative Fuel Vaporizer C Performance

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Generic OBD-II
P2A8E

Alternative Fuel Pump A Performance

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Generic OBD-II
P2A8F

Alternative Fuel Pump B Performance

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Generic OBD-II
P2A90

Alternative Fuel Pump C Performance

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Generic OBD-II
P2A91

Alternative Fuel Tank Select Valve A Control Circuit/Open

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Generic OBD-II
P2A92

Alternative Fuel Tank Select Valve A Control Performance

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Generic OBD-II
P2A93

Alternative Fuel Tank Select Valve A Control Circuit Low

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Generic OBD-II
P2A94

Alternative Fuel Tank Select Valve A Control Circuit High

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Generic OBD-II
P2A95

Alternative Fuel Tank Select Valve B Control Circuit/Open

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Generic OBD-II
P2A96

Alternative Fuel Tank Select Valve B Control Circuit Performance

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Generic OBD-II
P2A97

Alternative Fuel Tank Select Valve B Control Circuit Low

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Generic OBD-II
P2A98

Alternative Fuel Tank Select Valve B Control Circuit High

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Generic OBD-II
P2A99

Alternative Fuel Tank Select Valve C Control Circuit/Open

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Generic OBD-II
P2A9A

Alternative Fuel Tank Select Valve C Control Circuit Performance

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Generic OBD-II
P2A9B

Alternative Fuel Tank Select Valve C Control Circuit Low

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Generic OBD-II
P2A9C

Alternative Fuel Tank Select Valve C Control Circuit High

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Generic OBD-II
P2A9D

Alternative Fuel High Pressure System Small Leak

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Generic OBD-II
P2A9E

Alternative Fuel Return Line Valve Control Circuit/Open

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Generic OBD-II
P2A9F

Alternative Fuel Return Line Valve Control Circuit Range/Performance

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Generic OBD-II
P2AA0

Alternative Fuel Return Line Valve Control Circuit Low

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Generic OBD-II
P2AA1

Alternative Fuel Return Line Valve Control Circuit High

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Generic OBD-II
P2AA2

Alternative Fuel Return Line Insufficient Flow

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Generic OBD-II
P2AA3

Cold Start EGR B Flow Insufficient Detected

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Generic OBD-II
P2AA4

Cold Start EGR B Flow Excessive Detected

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Generic OBD-II
P2AA5

EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 1

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Generic OBD-II
P2AA6

EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 2

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Generic OBD-II
P2AA7

Engine Coolant Bypass Valve B Position Sensor Circuit

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Generic OBD-II
P2AA8

Engine Coolant Bypass Valve B Position Sensor Circuit Range/Performance

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Generic OBD-II
P2AA9

Engine Coolant Bypass Valve B Position Sensor Circuit Low

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Generic OBD-II
P2AAA

Engine Coolant Bypass Valve B Position Sensor Circuit High

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Generic OBD-II
P2AAB

Engine Coolant Bypass Valve B Position Sensor Circuit Intermittent/Erratic

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Generic OBD-II
P2AAC

Diesel Fuel Presence Sensor Circuit

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Generic OBD-II
P2AAD

Diesel Fuel Presence Sensor Circuit Range/Performance

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Generic OBD-II
P2AAE

Diesel Fuel Presence Sensor Circuit Low

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Generic OBD-II
P2AAF

Diesel Fuel Presence Sensor Circuit High

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Generic OBD-II
P2AB0

Particulate Matter Sensor Processor Performance

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Generic OBD-II
P2AB1

Catalyst Heater Control Module Performance

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Generic OBD-II
P2AB2

Catalyst Heater Control Module Supply Voltage

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Generic OBD-II
P2AB3

Cold Start Intake Manifold Runner Control Stuck Open Bank 1

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Generic OBD-II
P2AB4

Cold Start Intake Manifold Runner Control Stuck Open Bank 2

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Generic OBD-II
P2AB5

Cold Start Intake Manifold Runner Control Stuck Closed Bank 1

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Generic OBD-II
P2AB6

Cold Start Intake Manifold Runner Control Stuck Closed Bank 2

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Generic OBD-II
P2AB7

Wastegate Position Sensor A Circuit

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Generic OBD-II
P2AB8

Wastegate Position Sensor A Circuit Low

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Generic OBD-II
P2AB9

Wastegate Position Sensor A Circuit High

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Generic OBD-II
P2ABA

Wastegate Position Sensor B Circuit

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Generic OBD-II
P2ABB

Wastegate Position Sensor B Circuit Low

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Generic OBD-II
P2ABC

Wastegate Position Sensor B Circuit High

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Generic OBD-II
P2ABD

Turbocharger/Supercharger Wastegate Actuator A Driver Current/Temperature Too High

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Generic OBD-II
P2ABE

Turbocharger/Supercharger Wastegate Actuator B Driver Current/Temperature Too High

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Generic OBD-II
P2ABF

Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 1

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Generic OBD-II
P2AC0

Intake Air O2 Sensor Reference Voltage Circuit Range/Performance Bank 1

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Generic OBD-II
P2AC1

Intake Air O2 Sensor Reference Voltage Circuit Low Bank 1

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Generic OBD-II
P2AC2

Intake Air O2 Sensor Reference Voltage Circuit High Bank 1

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Generic OBD-II
P2AC3

Intake Air O2 Sensor Reference Voltage Circuit/Open Bank 2

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Generic OBD-II
P2AC4

Intake Air O2 Sensor Reference Voltage Circuit Range/Performance Bank 2

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Generic OBD-II
P2AC5

Intake Air O2 Sensor Reference Voltage Circuit Low Bank 2

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Generic OBD-II
P2AC6

Intake Air O2 Sensor Reference Voltage Circuit High Bank 2

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Generic OBD-II
P2AC7

Charge Air Cooler Coolant Temperature Sensor B Circuit

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Generic OBD-II
P2AC8

Charge Air Cooler Coolant Temperature Sensor B Circuit Range/Performance

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Generic OBD-II
P2AC9

Charge Air Cooler Coolant Temperature Sensor B Circuit Low

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Generic OBD-II
P2ACA

Charge Air Cooler Coolant Temperature Sensor B Circuit High

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Generic OBD-II
P2ACB

Charge Air Cooler Coolant Temperature Sensor B Intermittent/Erratic

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Generic OBD-II
P2ACC

Reductant Temperature Sensor B Circuit

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Generic OBD-II
P2ACD

Reductant Temperature Sensor B Circuit Range/Performance

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Generic OBD-II
P2ACE

Reductant Temperature Sensor B Circuit Low

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Generic OBD-II
P2ACF

Reductant Temperature Sensor B Circuit High

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Generic OBD-II
P2AD0

Reductant Temperature Sensor B Circuit Intermittent

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Generic OBD-II
P2AD1

Throttle/Pedal Position Sensor/Switch C/G Voltage Correlation

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Generic OBD-II
P2AD2

Throttle/Pedal Position Sensor/Switch B/G Voltage Correlation

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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.