Fault codes P21xx: throttle, injectors and reductant
Engine and transmission codes common to all makes (SAE J2012 standard).
Official codes: 256, from smallest to largest. Tap a code to get a direct link to share.
| Code | Meaning |
|---|---|
| P2100 | Throttle Actuator Control Motor Circuit Open |
| P2101 | Throttle Actuator Control Motor Circuit Range/Performance |
| P2102 | Throttle Actuator Control Motor Circuit Low |
| P2103 | Throttle Actuator 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 Control Module Internal Processor |
| P2108 | Throttle Actuator 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 Control System — Forced Limited RPM |
| P2111 | Throttle Actuator Control System — Stuck Open |
| P2112 | Throttle Actuator Control System — Stuck Closed |
| P2113 | Throttle Actuator Control System Forced Limited RPM |
| P2114 | Throttle Actuator Control System Forced Below Limit RPM |
| P2115 | Throttle/Pedal Position Sensor A Minimum Stop Performance |
| P2116 | Throttle/Pedal Position Sensor B Minimum Stop Performance |
| P2117 | Throttle/Pedal Position Sensor C Minimum Stop Performance |
| P2118 | Throttle Actuator Control Motor Current Range/Performance |
| P2119 | Throttle Closed Position 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 "C" Circuit |
| P2121 | Throttle/Pedal Position Sensor "C" Range/Performance |
| P2122 | Throttle/Pedal Position Sensor "D" Circuit Low |
| P2123 | Throttle/Pedal Position Sensor "D" Circuit High |
| P2124 | Throttle/Pedal Position Sensor "C" Circuit Low |
| P2125 | Throttle/Pedal Position Sensor "C" Circuit High |
| P2126 | Throttle/Pedal Position Sensor "C" Circuit Intermittent |
| P2127 | Throttle/Pedal Position Sensor "E" Circuit Low |
| P2128 | Throttle/Pedal Position Sensor "E" Circuit High |
| P2129 | Throttle/Pedal Position Sensor "D" 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 "E" Range/Performance |
| P2132 | Throttle/Pedal Position Sensor "E" Circuit Low |
| P2133 | Throttle/Pedal Position Sensor "E" Circuit High |
| P2134 | Throttle/Pedal Position Sensor/Switch F Circuit Intermittent |
| P2135 | Throttle/Pedal Position Sensor "A"/"B" Voltage Correlation |
| P2136 | Throttle/Pedal Position Sensor A/C Voltage Correlation |
| P2137 | Throttle/Pedal Position Sensor B/C Voltage Correlation |
| P2138 | Throttle/Pedal Position Sensor "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 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 | High Airflow/Vacuum Leak Detected (Slow Accumulation) |
| 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 Low |
| 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 Stuck Lean (Bank 1, Sensor 1) |
| P2196 | O2 Sensor Signal Stuck Rich (Bank 1, Sensor 1) |
| P2197 | O2 Sensor Signal Stuck Lean (Bank 2, Sensor 1) |
| P2198 | O2 Sensor Signal 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 Control Circuit/Open |
| P21C8 | Reductant Control Module Power Relay Control Circuit Low |
| P21C9 | Reductant Control Module Power Relay 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) |
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Official meanings: OBDex (public domain, CC0). Manufacturer codes: dtc-database (MIT license), probable meanings not verified by the manufacturers. The same meaning can vary depending on the model: always have a diagnosis confirmed by a professional.