P20xx OBD-II Codes (P2000–P2099)

101 fault codes in the P20xx range. Click any code for causes, diagnostic steps, severity, and common fixes.

NOx Trap Efficiency Below Threshold (Bank 1)

NOx Trap Efficiency Below Threshold (Bank 2)

Diesel Particulate Filter Efficiency Below Threshold (Bank 1)

Diesel Particulate Filter Efficiency Below Threshold (Bank 2)

Intake Manifold Runner Control Stuck Open (Bank 1)

Intake Manifold Runner Control Stuck Open (Bank 2)

Intake Manifold Runner Control Stuck Closed (Bank 1)

Intake Manifold Runner Control Stuck Closed (Bank 2)

Intake Manifold Runner Control Circuit Open (Bank 1)

Intake Manifold Runner Control Circuit Low (Bank 1)

Intake Manifold Runner Control Circuit High (Bank 1)

Intake Manifold Runner Control Circuit Open (Bank 2)

Intake Manifold Runner Control Circuit Low (Bank 2)

Intake Manifold Runner Control Circuit High (Bank 2)

Intake Manifold Runner Position Sensor/Switch Circuit (Bank 1)

Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance (Bank 1)

Intake Manifold Runner Position Sensor/Switch Circuit Low (Bank 1)

Intake Manifold Runner Position Sensor/Switch Circuit High (Bank 1)

Intake Manifold Runner Position Sensor/Switch Circuit High (Bank 2)

Intake Manifold Runner Position Sensor/Switch Circuit Low (Bank 2)

Intake Manifold Runner Position Sensor/Switch Circuit (Bank 2)

Intake Manifold Runner Position Sensor/Switch Circuit Range/Performance (Bank 2)

Intake Manifold Runner Position Sensor/Switch Circuit Low (Bank 2)

Intake Manifold Runner Position Sensor/Switch Circuit High (Bank 2)

Evaporative Emission System Fuel Vapor Temperature Sensor Circuit

Evaporative Emission System Fuel Vapor Temperature Sensor Circuit Range/Performance

Evaporative Emission System Fuel Vapor Temperature Sensor Circuit Low

Evaporative Emission System Fuel Vapor Temperature Sensor Circuit High

Evaporative Emission System Fuel Vapor Temperature Sensor Circuit Intermittent

Fuel Fired Heater Disabled

Fuel Fired Heater Performance

Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)

Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 1)

Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 1)

Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)

Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)

Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)

Reductant Injection Air Pressure Sensor Circuit

Reductant Injection Air Pressure Sensor Circuit Range/Performance

Reductant Injection Air Pressure Sensor Circuit Low

Reductant Injection Air Pressure Sensor Circuit High

Reductant Injection Air Pressure Sensor Circuit Intermittent

Reductant Temperature Sensor Circuit

Reductant Temperature Sensor Circuit Range/Performance

Reductant Temperature Sensor Circuit Low

Reductant Temperature Sensor Circuit High

Reductant Temperature Sensor Circuit Intermittent

Reductant Injector Circuit Open (Bank 1 Unit 1)

Reductant Injector Circuit Low (Bank 1 Unit 1)

Reductant Injector Circuit High (Bank 1 Unit 1)

Reductant System Performance (Bank 1)

Reductant Injector Circuit Intermittent (Bank 1 Unit 1)

Reductant Injector Circuit Open (Bank 1 Unit 2)

Reductant Injector Circuit Low (Bank 1 Unit 2)

Reductant Injector Circuit High (Bank 1 Unit 2)

Reductant Injector Circuit Intermittent (Bank 1 Unit 2)

Reductant Injector Circuit Open (Bank 2 Unit 1)

Reductant Injector Circuit Low (Bank 2 Unit 1)

Reductant Injector Circuit High (Bank 2 Unit 1)

Reductant Injector Circuit Intermittent (Bank 2 Unit 1)

Reductant Injector Circuit Open (Bank 2 Unit 2)

Turbocharger Boost Control 'A' Position Sensor Circuit

Turbocharger Boost Control 'A' Position Sensor Circuit Range/Performance

Turbocharger Boost Control 'A' Position Sensor Circuit Low

Turbocharger Boost Control 'A' Position Sensor Circuit High

Turbocharger Boost Control 'B' Position Sensor Circuit

Turbocharger Boost Control 'B' Position Sensor Circuit Range/Performance

Turbocharger Boost Control 'B' Position Sensor Circuit Low

Turbocharger Boost Control 'B' Position Sensor Circuit High

Fuel Level Sensor 'B' Circuit

Fuel Level Sensor 'B' Circuit Range/Performance

Fuel Level Sensor 'B' Circuit Low

Fuel Level Sensor 'B' Circuit High

Fuel Level Sensor 'B' Circuit Intermittent

Intake Manifold Air Temperature Sensor Circuit (Bank 1)

Intake Manifold Air Temperature Sensor Circuit Range/Performance (Bank 1)

Intake Manifold Air Temperature Sensor Circuit Low (Bank 1)

Intake Manifold Air Temperature Sensor Circuit High (Bank 1)

Intake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Low (Bank 1)

Intake Manifold Air Temperature Sensor Circuit (Bank 2)

Intake Manifold Air Temperature Sensor Circuit Range/Performance (Bank 2)

Intake Manifold Air Temperature Sensor Circuit Low (Bank 2)

Intake Manifold Air Temperature Sensor Circuit High (Bank 2)

Intake Manifold Air Temperature Sensor Circuit Intermittent (Bank 2)

Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 2)

Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)

Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)

Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 2 Sensor 2)

Exhaust Gas Temperature Sensor Circuit Low (Bank 2 Sensor 2)

Intake Manifold Runner Control Circuit/Open (Bank 1) - Position 'A'

Intake Manifold Runner Control Circuit Low (Bank 1) - Position 'A'

Intake Manifold Runner Control Circuit High (Bank 1) - Position 'A'

Intake Manifold Runner Control Circuit/Open (Bank 2) - Position 'A'

Intake Manifold Runner Control Circuit Low (Bank 2) - Position 'A'

Intake Manifold Runner Control Circuit High (Bank 2) - Position 'A'

Intake Manifold Runner Control Circuit/Open (Bank 1) - Position 'B'

Intake Manifold Runner Control Circuit Low (Bank 1) - Position 'B'

Post Catalyst Fuel Trim System Too Lean (Bank 1)

Post Catalyst Fuel Trim System Too Rich (Bank 1)

Post Catalyst Fuel Trim System Too Lean (Bank 2)

Post Catalyst Fuel Trim System Too Rich (Bank 2)

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