THE CODE DIRECTORY
Diagnostic code references — Page 96.
Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.
Generic OBD-II
P2B37
A Camshaft Profile Actuator B Control Circuit Low Bank 2
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Generic OBD-II
P2B38
A Camshaft Profile Actuator B Control Circuit High Bank 2
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Generic OBD-II
P2B39
An exhaust profile-actuator open result concerns the energized drive path
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Generic OBD-II
P2B3A
Exhaust profile-actuator circuit low is an on-state electrical finding
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Generic OBD-II
P2B3B
Resolve the exhaust actuator’s command-state conflict before testing high voltage
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Generic OBD-II
P2B3C
B Camshaft Profile Actuator B Control Circuit/Open Bank 2
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Generic OBD-II
P2B3D
B Camshaft Profile Actuator B Control Circuit Low Bank 2
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Generic OBD-II
P2B3E
B Camshaft Profile Actuator B Control Circuit High Bank 2
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Generic OBD-II
P2B3F
A Camshaft Position Actuator Position Sensor B Circuit Bank 1
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Generic OBD-II
P2B40
A Camshaft Position Actuator Position Sensor B Range/Performance Bank 1
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Generic OBD-II
P2B41
A Camshaft Position Actuator Position Sensor B Circuit Low Bank 1
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Generic OBD-II
P2B42
A Camshaft Position Actuator Position Sensor B Circuit High Bank 1
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Generic OBD-II
P2B43
A Camshaft Position Actuator Position Sensor B Circuit Bank 2
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Generic OBD-II
P2B44
A Camshaft Position Actuator Position Sensor B Range/Performance Bank 2
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Generic OBD-II
P2B45
A Camshaft Position Actuator Position Sensor B Circuit Low Bank 2
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Generic OBD-II
P2B46
A Camshaft Position Actuator Position Sensor B Circuit High Bank 2
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Generic OBD-II
P2B47
B Camshaft Position Actuator Position Sensor B Circuit Bank 1
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Generic OBD-II
P2B48
B Camshaft Position Actuator Position Sensor B Range/Performance Bank 1
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Generic OBD-II
P2B49
B Camshaft Position Actuator Position Sensor B Circuit Low Bank 1
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Generic OBD-II
P2B4A
B Camshaft Position Actuator Position Sensor B Circuit High Bank 1
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Generic OBD-II
P2B4B
B Camshaft Position Actuator Position Sensor B Circuit Bank 2
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Generic OBD-II
P2B4C
B Camshaft Position Actuator Position Sensor B Range/Performance Bank 2
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Generic OBD-II
P2B4D
B Camshaft Position Actuator Position Sensor B Circuit Low Bank 2
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Generic OBD-II
P2B4E
B Camshaft Position Actuator Position Sensor B Circuit High Bank 2
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Generic OBD-II
P2B4F
GM’s profile-performance row describes uncommanded pin movement
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Generic OBD-II
P2B50
A Camshaft Profile Actuator B Control Performance/Stuck Off Bank 2
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Generic OBD-II
P2B51
The exhaust profile monitor detects a pin moving without a command
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Generic OBD-II
P2B52
B Camshaft Profile Actuator B Control Performance/Stuck Off Bank 2
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Generic OBD-II
P2B53
An intake profile pin extends but does not return within the engine cycle
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Generic OBD-II
P2B54
A Camshaft Profile Actuator B Control Stuck On Bank 2
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Generic OBD-II
P2B55
B Camshaft Profile Actuator B Control Stuck On Bank 1
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Generic OBD-II
P2B56
B Camshaft Profile Actuator B Control Stuck On Bank 2
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Generic OBD-II
P2B57
Low Engine Oil Pressure - Camshaft Control Disabled
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Generic OBD-II
P2B58
coolant flow valve motor-driver current above its limit
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Generic OBD-II
P2B59
an open motor circuit at the coolant flow valve
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Generic OBD-II
P2B5A
coolant valve motor circuit classified as shorted to ground
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Generic OBD-II
P2B5B
coolant valve motor circuit classified as shorted to power
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Generic OBD-II
P2B5C
low supply at the coolant valve motor driver
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Generic OBD-II
P2B5D
Engine Coolant Flow Control Valve Position Sensor Circuit
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Generic OBD-II
P2B5E
coolant valve position data below its SENT range
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Generic OBD-II
P2B5F
coolant valve position data above its SENT range
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Generic OBD-II
P2B60
coolant valve position fails to follow a settled request
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Generic OBD-II
P2B61
Coolant valve needs high drive but does not reach its position
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Generic OBD-II
P2B62
Pump supply-voltage status is separate from a low output circuit
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Generic OBD-II
P2B63
An actuator-stuck report should not be reduced to an open circuit
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Generic OBD-II
P2B64
Pump controller temperature is different from coolant temperature
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Generic OBD-II
P2B65
An overspeed or dry-run classification is not direct proof of trapped air
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Generic OBD-II
P2B66
Coolant Pump D Control Circuit/Open
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Generic OBD-II
P2B67
Coolant Pump D Control Circuit Low
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Generic OBD-II
P2B68
Coolant Pump D Control Circuit High
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Generic OBD-II
P2B69
Coolant Pump D Supply Voltage Circuit
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Generic OBD-II
P2B6A
Coolant Pump D Stuck/Stalled
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Generic OBD-II
P2B6B
Coolant Pump D Control Module Overtemperature
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Generic OBD-II
P2B6C
Coolant Pump D Overspeed/Air in System
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Generic OBD-II
P2B6D
Engine Coolant Flow Control Valve Position Sensor Circuit Intermittent/Erratic
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Generic OBD-II
P2B6E
Turbocharger/Supercharger A Temperature Sensor Circuit
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Generic OBD-II
P2B6F
Turbocharger/Supercharger A Temperature Sensor Circuit Low
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Generic OBD-II
P2B70
Turbocharger/Supercharger A Temperature Sensor Circuit High
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Generic OBD-II
P2B71
Turbocharger/Supercharger A Temperature Sensor Circuit Circuit Range/Performance
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Generic OBD-II
P2B72
Coolant Heater A Control Circuit/Open
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Generic OBD-II
P2B73
Coolant Heater A Control Circuit Low
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Generic OBD-II
P2B74
Coolant Heater A Control Circuit High
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Generic OBD-II
P2B75
Coolant Heater A Control Circuit Performance
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Generic OBD-II
P2B76
Coolant Heater B Control Circuit/Open
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Generic OBD-II
P2B77
Coolant Heater B Control Circuit Low
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Generic OBD-II
P2B78
Coolant Heater B Control Circuit High
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Generic OBD-II
P2B79
Coolant Heater B Control Circuit Performance
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Generic OBD-II
P2B7A
EVAP System Pressure Sensor/Switch C Circuit
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Generic OBD-II
P2B7B
EVAP System Pressure Sensor/Switch C Circuit Range/Performance
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Generic OBD-II
P2B7C
EVAP System Pressure Sensor/Switch C Circuit Low
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Generic OBD-II
P2B7D
EVAP System Pressure Sensor/Switch C Circuit High
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Generic OBD-II
P2B7E
EVAP System Pressure Sensor/Switch C Circuit Intermittent
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Generic OBD-II
P2B7F
Turbocharger/Supercharger Boost Control Module A Calibration Not Learned/Programmed
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Generic OBD-II
P2B80
Turbocharger/Supercharger Boost Control Module B Calibration Not Learned/Programmed
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Generic OBD-II
P2B81
A SENT status problem in bank 1 wastegate feedback
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Generic OBD-II
P2B82
Bank 2 wastegate position data with invalid SENT status
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Generic OBD-II
P2B83
charge-air cooler pump speed above its monitored range
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Generic OBD-II
P2B84
understanding the pump underspeed monitor without misusing its threshold
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Generic OBD-II
P2B85
Coolant pump underspeed is a sustained tracking deficit
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Generic OBD-II
P2B86
Coolant pump A runs faster than its stabilized command
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Generic OBD-II
P2B87
Coolant pump A reports speed below its requested operation
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Generic OBD-II
P2B88
Intake Air O2 Sensor Circuit Bank 1
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Generic OBD-II
P2B89
Intake Air O2 Sensor Circuit Low Voltage Bank 1
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Generic OBD-II
P2B8A
Intake Air O2 Sensor Circuit High Voltage Bank 1
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Generic OBD-II
P2B8B
Intake Air O2 Sensor Heater Control Circuit/Open Bank 1
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Generic OBD-II
P2B8C
Intake Air O2 Sensor Heater Control Circuit Range/Performance Bank 1
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Generic OBD-II
P2B8D
Intake Air O2 Sensor Heater Control Circuit Low Bank 1
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Generic OBD-II
P2B8E
Intake Air O2 Sensor Heater Control Circuit High Bank 1
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Generic OBD-II
P2B8F
Turbocharger/Supercharger B Temperature Sensor Circuit
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Generic OBD-II
P2B90
Turbocharger/Supercharger B Temperature Sensor Circuit Low
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Generic OBD-II
P2B91
Turbocharger/Supercharger B Temperature Sensor Circuit High
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Generic OBD-II
P2B92
Turbocharger/Supercharger B Temperature Sensor Circuit Circuit Range/Performance
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Generic OBD-II
P2B93
Bank 1 wastegate feedback outside its learned closed-stop band
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Generic OBD-II
P2B94
Why the bank 2 wastegate closed-stop reference fails
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Generic OBD-II
P2B95
Cold-start multi-pulse fueling misses opening events across the engine
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Generic OBD-II
P2B96
Global injection-pulse monitoring detects missing opening signatures
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Generic OBD-II
P2B97
exhaust valve learned endpoints outside their allowed windows
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Generic OBD-II
P2B98
low supply to the exhaust pressure valve motor
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Generic OBD-II
P2B99
exhaust valve H-bridge temperature above its limit
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Generic OBD-II
P2B9A
Reductant Quality Sensor Circuit Intermittent/Erratic
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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.