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 Intermittent Bank 1

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 Low Bank 2

Intake Manifold Runner Position Sensor/Switch Circuit High Bank 2

Intake Manifold Runner Position Sensor/Switch Circuit Intermittent 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 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 Bank 2 Sensor 2

Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 2

Exhaust Gas Temperature Sensor Circuit High Bank 2 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 Injection Valve Circuit/Open Bank 2 Unit 1

Reductant Injection Valve Circuit Low Bank 2 Unit 1

Reductant Injection Valve Circuit High Bank 2 Unit 1

Reductant Injection Valve Circuit/Open Bank 1 Unit 2

Reductant Injection Valve Circuit Low Bank 1 Unit 2

Reductant Injection Valve Circuit High Bank 1 Unit 2

Reductant Injection Valve Circuit/Open Bank 2 Unit 2

Reductant Injection Valve Circuit Low Bank 2 Unit 2

Reductant Injection Valve Circuit High Bank 2 Unit 2

Reductant Injection Air Pump Control Circuit/Open

Reductant Injection Air Pump Control Circuit Low

Reductant Injection Air Pump Control Circuit High

Reductant/Regeneration Supply Control Circuit/Open

Reductant/Regeneration Supply Control Circuit Low

Reductant/Regeneration Supply Control Circuit High

Fuel Level Sensor "B" Circuit

Fuel Level Sensor "B" Circuit Performance

Fuel Level Sensor "B" Circuit Low

Fuel Level Sensor 'B' Circuit

Fuel Level Sensor "B" Circuit Intermittent

Intake Manifold Tuning (IMT) Valve Stuck Open Bank 1

Intake Manifold Tuning (IMT) Valve Stuck Closed Bank 1

Throttle Actuator Control System - Ice Blockage

Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Idle

Manifold Absolute Pressure/Mass Air Flow - Throttle Position Correlation at Higher Load

Intake Manifold Air Temperature Sensor Circuit Low (Bank 1)

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

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

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

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

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1

Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 1

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

Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 1

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

Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 2

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

Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2

"A" Camshaft Position Actuator Control Circuit Low Bank 1

"A" Camshaft Position Actuator Control Circuit High Bank 1

"B" Camshaft Position Actuator Control Circuit Low Bank 1

"B" Camshaft Position Actuator Control Circuit High Bank 1

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

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

"B" Camshaft Position Actuator Control Circuit Low Bank 2

"B" Camshaft Position Actuator Control Circuit High Bank 2

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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