P21xx — Fuel & air metering and auxiliary emission controls
256 standardized codes from P2100 to P21FF. Manufacturer-specific codes in this range are not listed.
- P2100 Throttle Actuator A Control Motor Circuit/Open
- P2101 Throttle Actuator A Control Motor Circuit Range/Performance
- P2102 Throttle Actuator A Control Motor Circuit Low
- P2103 Throttle Actuator A Control Motor Circuit High
- P2104 Throttle Actuator Control System - Forced Idle
- P2105 Throttle Actuator Control System - Forced Engine Shutdown
- P2106 Throttle Actuator Control System - Forced Limited Power
- P2107 Throttle Actuator A Control Module Processor
- P2108 Throttle Actuator A Control Module Performance
- P2109 Throttle/Pedal Position Sensor A Minimum Stop Performance
- P210A Throttle Actuator B Control Motor Circuit/Open
- P210B Throttle Actuator B Control Motor Circuit Range/Performance
- P210C Throttle Actuator B Control Motor Circuit Low
- P210D Throttle Actuator B Control Motor Circuit High
- P210E Throttle/Pedal Position Sensor/Switch C/F Voltage Correlation
- P210F Throttle Actuator B Control System - Forced Limited RPM
- P2110 Throttle Actuator A Control System - Forced Limited RPM
- P2111 Throttle Actuator A Control System - Stuck Open
- P2112 Throttle Actuator A Control System - Stuck Closed
- P2113 Throttle/Pedal Position Sensor B Minimum Stop Performance
- P2114 Throttle/Pedal Position Sensor C Minimum Stop Performance
- P2115 Throttle/Pedal Position Sensor D Minimum Stop Performance
- P2116 Throttle/Pedal Position Sensor E Minimum Stop Performance
- P2117 Throttle/Pedal Position Sensor F Minimum Stop Performance
- P2118 Throttle Actuator A Control Motor Current Range/Performance
- P2119 Throttle Actuator A Control Throttle Body Range/Performance
- P211A Throttle Actuator B Control System - Stuck Open
- P211B Throttle Actuator B Control System - Stuck Closed
- P211C Throttle Actuator B Control Motor Current Range/Performance
- P211D Throttle Actuator B Control Throttle Body Range/Performance
- P211E Throttle Actuator B Control Module Processor
- P211F Throttle Actuator B Control Module Performance
- P2120 Throttle/Pedal Position Sensor/Switch D Circuit
- P2121 Throttle/Pedal Position Sensor/Switch D Circuit Range/Performance
- P2122 Throttle/Pedal Position Sensor/Switch D Circuit Low
- P2123 Throttle/Pedal Position Sensor/Switch D Circuit High
- P2124 Throttle/Pedal Position Sensor/Switch D Circuit Intermittent
- P2125 Throttle/Pedal Position Sensor/Switch E Circuit
- P2126 Throttle/Pedal Position Sensor/Switch E Circuit Range/Performance
- P2127 Throttle/Pedal Position Sensor/Switch E Circuit Low
- P2128 Throttle/Pedal Position Sensor/Switch E Circuit High
- P2129 Throttle/Pedal Position Sensor/Switch E Circuit Intermittent
- P212A Throttle Position Sensor/Switch G Circuit
- P212B Throttle Position Sensor/Switch G Circuit Range/Performance
- P212C Throttle Position Sensor/Switch G Circuit Low
- P212D Throttle Position Sensor/Switch G Circuit High
- P212E Throttle Position Sensor/Switch G Circuit Intermittent
- P212F Throttle/Pedal Position Sensor/Switch F/G Voltage Correlation
- P2130 Throttle/Pedal Position Sensor/Switch F Circuit
- P2131 Throttle/Pedal Position Sensor/Switch F Circuit Range/Performance
- P2132 Throttle/Pedal Position Sensor/Switch F Circuit Low
- P2133 Throttle/Pedal Position Sensor/Switch F Circuit High
- P2134 Throttle/Pedal Position Sensor/Switch F Circuit Intermittent
- P2135 Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation
- P2136 Throttle/Pedal Position Sensor/Switch A/C Voltage Correlation
- P2137 Throttle/Pedal Position Sensor/Switch B/C Voltage Correlation
- P2138 Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation
- P2139 Throttle/Pedal Position Sensor/Switch D/F Voltage Correlation
- P213A EGR Throttle Control Circuit B/Open
- P213B EGR Throttle Control Circuit B Range/Performance
- P213C EGR Throttle Control Circuit B Low
- P213D EGR Throttle Control Circuit B High
- P213E Fuel Injection System Fault - Forced Engine Shutdown
- P213F Fuel Pump System Fault - Forced Engine Shutdown
- P2140 Throttle/Pedal Position Sensor/Switch E/F Voltage Correlation
- P2141 EGR Throttle Control Circuit A Low
- P2142 EGR Throttle Control Circuit A High
- P2143 EGR Vent Control Circuit/Open
- P2144 EGR Vent Control Circuit Low
- P2145 EGR Vent Control Circuit High
- P2146 Fuel Injector Group A Supply Voltage Circuit/Open
- P2147 Fuel Injector Group A Supply Voltage Circuit Low
- P2148 Fuel Injector Group A Supply Voltage Circuit High
- P2149 Fuel Injector Group B Supply Voltage Circuit/Open
- P214A SCR NOx Catalyst Inlet Temperature Too High
- P214B SCR NOx Catalyst Inlet Temperature Too High During Particulate Filter Regeneration
- P214C SCR NOx Catalyst Outlet Temperature Too High
- P214D SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration
- P214E Reductant Pump A Current Too High
- P214F Reductant Heater A Current Too High
- P2150 Fuel Injector Group B Supply Voltage Circuit Low
- P2151 Fuel Injector Group B Supply Voltage Circuit High
- P2152 Fuel Injector Group C Supply Voltage Circuit/Open
- P2153 Fuel Injector Group C Supply Voltage Circuit Low
- P2154 Fuel Injector Group C Supply Voltage Circuit High
- P2155 Fuel Injector Group D Supply Voltage Circuit/Open
- P2156 Fuel Injector Group D Supply Voltage Circuit Low
- P2157 Fuel Injector Group D Supply Voltage Circuit High
- P2158 Vehicle Speed Sensor B Circuit
- P2159 Vehicle Speed Sensor B Circuit Range/Performance
- P215A Vehicle Speed - Wheel Speed Correlation
- P215B Vehicle Speed - Output Shaft Speed Correlation
- P215C Output Shaft Speed - Wheel Speed Correlation
- P215D Reductant Pump B Stuck On
- P215E Reductant Heater D Current Too Low
- P215F Reductant Heater D Current Too High
- P2160 Vehicle Speed Sensor B Circuit Low
- P2161 Vehicle Speed Sensor B Circuit Intermittent/Erratic/High
- P2162 Vehicle Speed Sensor A/B Correlation
- P2163 Throttle/Pedal Position Sensor A Maximum Stop Performance
- P2164 Throttle/Pedal Position Sensor B Maximum Stop Performance
- P2165 Throttle/Pedal Position Sensor C Maximum Stop Performance
- P2166 Throttle/Pedal Position Sensor D Maximum Stop Performance
- P2167 Throttle/Pedal Position Sensor E Maximum Stop Performance
- P2168 Throttle/Pedal Position Sensor F Maximum Stop Performance
- P2169 Exhaust Pressure Regulator Vent Solenoid Control Circuit/Open
- P216A Fuel Injector Group E Supply Voltage Circuit/Open
- P216B Fuel Injector Group E Supply Voltage Circuit Low
- P216C Fuel Injector Group E Supply Voltage Circuit High
- P216D Fuel Injector Group F Supply Voltage Circuit/Open
- P216E Fuel Injector Group F Supply Voltage Circuit Low
- P216F Fuel Injector Group F Supply Voltage Circuit High
- P2170 Exhaust Pressure Regulator Vent Solenoid Control Circuit Low
- P2171 Exhaust Pressure Regulator Vent Solenoid Control Circuit High
- P2172 Throttle Actuator Control System - Sudden High Air Flow Detected
- P2173 Throttle Actuator Control System - High Air Flow Detected
- P2174 Throttle Actuator Control System - Sudden Low Air Flow Detected
- P2175 Throttle Actuator Control System - Low Air Flow Detected
- P2176 Throttle Actuator A Control System - Idle Position Not Learned
- P2177 System Too Lean Off Idle (Bank 1)
- P2178 System Too Rich Off Idle (Bank 1)
- P2179 System Too Lean Off Idle (Bank 2)
- P217A Fuel Injector Group G Supply Voltage Circuit/Open
- P217B Fuel Injector Group G Supply Voltage Circuit Low
- P217C Fuel Injector Group G Supply Voltage Circuit High
- P217D Fuel Injector Group H Supply Voltage Circuit/Open
- P217E Fuel Injector Group H Supply Voltage Circuit Low
- P217F Fuel Injector Group H Supply Voltage Circuit High
- P2180 System Too Rich Off Idle (Bank 2)
- P2181 Cooling System Performance
- P2182 Engine Coolant Temperature Sensor 2 Circuit
- P2183 Engine Coolant Temperature Sensor 2 Circuit Range/Performance
- P2184 Engine Coolant Temperature Sensor 2 Circuit Low
- P2185 Engine Coolant Temperature Sensor 2 Circuit High
- P2186 Engine Coolant Temperature Sensor 2 Circuit Intermittent/Erratic
- P2187 System Too Lean at Idle (Bank 1)
- P2188 System Too Rich at Idle (Bank 1)
- P2189 System Too Lean at Idle (Bank 2)
- P218A Throttle Actuator B Control System - Idle Position Not Learned
- P218B Throttle/Fuel Inhibit B Circuit
- P218C Throttle/Fuel Inhibit B Circuit Range/Performance
- P218D Throttle/Fuel Inhibit B Circuit Low
- P218E Throttle/Fuel Inhibit B Circuit High
- P218F Reductant No Flow Detected
- P2190 System Too Rich at Idle (Bank 2)
- P2191 System Too Lean at Higher Load (Bank 1)
- P2192 System Too Rich at Higher Load (Bank 1)
- P2193 System Too Lean at Higher Load (Bank 2)
- P2194 System Too Rich at Higher Load (Bank 2)
- P2195 O2 Sensor Signal Biased/Stuck Lean (Bank 1, Sensor 1)
- P2196 O2 Sensor Signal Biased/Stuck Rich (Bank 1, Sensor 1)
- P2197 O2 Sensor Signal Biased/Stuck Lean (Bank 2, Sensor 1)
- P2198 O2 Sensor Signal Biased/Stuck Rich (Bank 2, Sensor 1)
- P2199 Intake Air Temperature Sensor 1/2 Correlation
- P219A Bank 1 Air-Fuel Ratio Imbalance
- P219B Bank 2 Air-Fuel Ratio Imbalance
- P219C Cylinder 1 Air-Fuel Ratio Imbalance
- P219D Cylinder 2 Air-Fuel Ratio Imbalance
- P219E Cylinder 3 Air-Fuel Ratio Imbalance
- P219F Cylinder 4 Air-Fuel Ratio Imbalance
- P21A0 Cylinder 5 Air-Fuel Ratio Imbalance
- P21A1 Cylinder 6 Air-Fuel Ratio Imbalance
- P21A2 Cylinder 7 Air-Fuel Ratio Imbalance
- P21A3 Cylinder 8 Air-Fuel Ratio Imbalance
- P21A4 Cylinder 9 Air-Fuel Ratio Imbalance
- P21A5 Cylinder 10 Air-Fuel Ratio Imbalance
- P21A6 Cylinder 11 Air-Fuel Ratio Imbalance
- P21A7 Cylinder 12 Air-Fuel Ratio Imbalance
- P21A8 Reductant Level Sensor B Circuit
- P21A9 Reductant Level Sensor B Circuit Range/Performance
- P21AA Reductant Level Sensor B Circuit Low
- P21AB Reductant Level Sensor B Circuit High
- P21AC Reductant Level Sensor B Circuit Intermittent/Erratic
- P21AD Reductant Level Sensor C Circuit
- P21AE Reductant Level Sensor C Circuit Range/Performance
- P21AF Reductant Level Sensor C Circuit Low
- P21B0 Reductant Level Sensor C Circuit High
- P21B1 Reductant Level Sensor C Circuit Intermittent/Erratic
- P21B2 Excessive Time To Enter Closed Loop NOx Adsorber Control
- P21B3 Closed Loop NOx Adsorber Control At Limit - Too High
- P21B4 NOx Adsorber - Over Temperature (Bank 1)
- P21B5 NOx Adsorber - Over Temperature (Bank 2)
- P21B6 Cold Start Cylinder 1 Injection Timing
- P21B7 Cold Start Cylinder 2 Injection Timing
- P21B8 Cold Start Cylinder 3 Injection Timing
- P21B9 Cold Start Cylinder 4 Injection Timing
- P21BA Cold Start Cylinder 5 Injection Timing
- P21BB Cold Start Cylinder 6 Injection Timing
- P21BC Cold Start Cylinder 7 Injection Timing
- P21BD Cold Start Cylinder 8 Injection Timing
- P21BE Cold Start Cylinder 9 Injection Timing
- P21BF Cold Start Cylinder 10 Injection Timing
- P21C0 Cold Start Cylinder 11 Injection Timing
- P21C1 Cold Start Cylinder 12 Injection Timing
- P21C2 Reductant Heater Relay Control Circuit/Open
- P21C3 Reductant Heater Relay Control Circuit Low
- P21C4 Reductant Heater Relay Control Circuit High
- P21C5 Reductant Level Sensor A Stuck
- P21C6 Reductant Level Sensor B Stuck
- P21C7 Reductant Control Module Power Relay/Relays Control Circuit/Open
- P21C8 Reductant Control Module Power Relay/Relays Control Circuit Low
- P21C9 Reductant Control Module Power Relay/Relays Control Circuit High
- P21CA Reductant Control Module Supply Voltage Circuit
- P21CB Reductant Control Module Supply Voltage Low
- P21CC Reductant Control Module Supply Voltage High
- P21CD Reductant Quality Module Supply Voltage Low
- P21CE Reductant Quality Module Performance
- P21CF Cylinder 1 Injector B Circuit/Open
- P21D0 Cylinder 2 Injector B Circuit/Open
- P21D1 Cylinder 3 Injector B Circuit/Open
- P21D2 Cylinder 4 Injector B Circuit/Open
- P21D3 Cylinder 5 Injector B Circuit/Open
- P21D4 Cylinder 6 Injector B Circuit/Open
- P21D5 Cylinder 7 Injector B Circuit/Open
- P21D6 Cylinder 8 Injector B Circuit/Open
- P21D7 Cylinder 9 Injector B Circuit/Open
- P21D8 Cylinder 10 Injector B Circuit/Open
- P21D9 Cylinder 11 Injector B Circuit/Open
- P21DA Cylinder 12 Injector B Circuit/Open
- P21DB Cylinder 1 Injector B Circuit Low
- P21DC Cylinder 1 Injector B Circuit High
- P21DD Reductant Heater A Current Too Low
- P21DE Cylinder 2 Injector B Circuit Low
- P21DF Cylinder 2 Injector B Circuit High
- P21E0 Cylinder 3 Injector B Circuit Low
- P21E1 Cylinder 3 Injector B Circuit High
- P21E2 Cylinder 4 Injector B Circuit Low
- P21E3 Cylinder 4 Injector B Circuit High
- P21E4 Cylinder 5 Injector B Circuit Low
- P21E5 Cylinder 5 Injector B Circuit High
- P21E6 Cylinder 6 Injector B Circuit Low
- P21E7 Cylinder 6 Injector B Circuit High
- P21E8 Cylinder 7 Injector B Circuit Low
- P21E9 Cylinder 7 Injector B Circuit High
- P21EA Cylinder 8 Injector B Circuit Low
- P21EB Cylinder 8 Injector B Circuit High
- P21EC Cylinder 9 Injector B Circuit Low
- P21ED Cylinder 9 Injector B Circuit High
- P21EE Cylinder 10 Injector B Circuit Low
- P21EF Cylinder 10 Injector B Circuit High
- P21F0 Cylinder 11 Injector B Circuit Low
- P21F1 Cylinder 11 Injector B Circuit High
- P21F2 Cylinder 12 Injector B Circuit Low
- P21F3 Cylinder 12 Injector B Circuit High
- P21F4 Fuel Control System B Too Lean Off Idle (Bank 1)
- P21F5 Fuel Control System B Too Rich Off Idle (Bank 1)
- P21F6 Fuel Control System B Too Lean Off Idle (Bank 2)
- P21F7 Fuel Control System B Too Rich Off Idle (Bank 2)
- P21F8 Fuel Control System B Too Lean at Idle (Bank 1)
- P21F9 Fuel Control System B Too Rich at Idle (Bank 1)
- P21FA Fuel Control System B Too Lean at Idle (Bank 2)
- P21FB Fuel Control System B Too Rich at Idle (Bank 2)
- P21FC Fuel Control System B Too Lean at Higher Load (Bank 1)
- P21FD Fuel Control System B Too Rich at Higher Load (Bank 1)
- P21FE Fuel Control System B Too Lean at Higher Load (Bank 2)
- P21FF Fuel Control System B Too Rich at Higher Load (Bank 2)