This section covers OBD-II codes P2200 to P2299, which are primarily related to Fuel and air metering and auxiliary emission control.
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| Code | Description |
| P2200 | NOx Sensor Circuit Bank 1 |
| P2201 | NOx Sensor Circuit Range/Performance Bank 1 |
| P2202 | NOx Sensor Circuit Low Bank 1 |
| P2203 | NOx Sensor Circuit High Bank 1 |
| P2204 | NOx Sensor Circuit Intermittent Bank 1 |
| P2205 | NOx Sensor Heater Control Circuit/Open Bank 1 |
| P2206 | NOx Sensor Heater Control Circuit Low Bank 1 |
| P2207 | NOx Sensor Heater Control Circuit High Bank 1 |
| P2208 | NOx Sensor Heater Sense Circuit Bank 1 |
| P2209 | NOx Sensor Heater Sense Circuit Range/Performance Bank 1 |
| P220A | ISO/SAE Reserved |
| P220B | ISO/SAE Reserved |
| P220C | ISO/SAE Reserved |
| P220D | ISO/SAE Reserved |
| P220E | ISO/SAE Reserved |
| P220F | ISO/SAE Reserved |
| P2210 | NOx Sensor Heater Sense Circuit Low Bank 1 |
| P2211 | NOx Sensor Heater Sense Circuit High Bank 1 |
| P2212 | NOx Sensor Heater Sense Circuit Intermittent Bank 1 |
| P2213 | NOx Sensor Circuit Bank 2 |
| P2214 | NOx Sensor Circuit Range/Performance Bank 2 |
| P2215 | NOx Sensor Circuit Low Bank 2 |
| P2216 | NOx Sensor Circuit High Bank 2 |
| P2217 | NOx Sensor Circuit Intermittent Bank 2 |
| P2218 | NOx Sensor Heater Control Circuit/Open Bank 2 |
| P2219 | NOx Sensor Heater Control Circuit Low Bank 2 |
| P221A | ISO/SAE Reserved |
| P221B | ISO/SAE Reserved |
| P221C | ISO/SAE Reserved |
| P221D | ISO/SAE Reserved |
| P221E | ISO/SAE Reserved |
| P221F | ISO/SAE Reserved |
| P2220 | NOx Sensor Heater Control Circuit High Bank 2 |
| P2221 | NOx Sensor Heater Sense Circuit Bank 2 |
| P2222 | NOx Sensor Heater Sense Circuit Range/Performance Bank 2 |
| P2223 | NOx Sensor Heater Sense Circuit Low Bank 2 |
| P2224 | NOx Sensor Heater Sense Circuit High Bank 2 |
| P2225 | NOx Sensor Heater Sense Circuit Intermittent Bank 2 |
| P2226 | Barometric Pressure Sensor “A” Circuit |
| P2227 | Barometric Pressure Sensor “A” Circuit Range/Performance |
| P2228 | Barometric Pressure Sensor “A” Circuit Low |
| P2229 | Barometric Pressure Sensor “A” Circuit High |
| P222A | Barometric Pressure Sensor “B” Circuit |
| P222B | Barometric Pressure Sensor “B” Circuit Range/Performance |
| P222C | Barometric Pressure Sensor “B” Circuit Low |
| P222D | Barometric Pressure Sensor “B” Circuit High |
| P222E | Barometric Pressure Sensor “B” Circuit Intermittent/Erratic |
| P222F | Barometric Pressure Sensor “A”/”B” Correlation |
| P2230 | Barometric Pressure Sensor “A” Circuit Intermittent/Erratic |
| P2231 | O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 1 |
| P2232 | O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 2 |
| P2233 | O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 1 Sensor 3 |
| P2234 | O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 1 |
| P2235 | O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 2 |
| P2236 | O2 Sensor Signal Circuit Shorted to Heater Circuit Bank 2 Sensor 3 |
| P2237 | O2 Sensor Positive Current Control Circuit/Open Bank 1 Sensor 1 |
| P2238 | O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1 |
| P2239 | O2 Sensor Positive Current Control Circuit High Bank 1 Sensor 1 |
| P223A | ISO/SAE Reserved |
| P223B | ISO/SAE Reserved |
| P223C | ISO/SAE Reserved |
| P223D | ISO/SAE Reserved |
| P223E | ISO/SAE Reserved |
| P223F | ISO/SAE Reserved |
| P2240 | O2 Sensor Positive Current Control Circuit/Open Bank 2 Sensor 1 |
| P2241 | O2 Sensor Positive Current Control Circuit Low Bank 2 Sensor 1 |
| P2242 | O2 Sensor Positive Current Control Circuit High Bank 2 Sensor 1 |
| P2243 | O2 Sensor Reference Voltage Circuit/Open Bank 1 Sensor 1 |
| P2244 | O2 Sensor Reference Voltage Performance Bank 1 Sensor 1 |
| P2245 | O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1 |
| P2246 | O2 Sensor Reference Voltage Circuit High Bank 1 Sensor 1 |
| P2247 | O2 Sensor Reference Voltage Circuit/Open Bank 2 Sensor 1 |
| P2248 | O2 Sensor Reference Voltage Performance Bank 2 Sensor 1 |
| P2249 | O2 Sensor Reference Voltage Circuit Low Bank 2 Sensor 1 |
| P224A | ISO/SAE Reserved |
| P224B | ISO/SAE Reserved |
| P224C | ISO/SAE Reserved |
| P224D | ISO/SAE Reserved |
| P224E | ISO/SAE Reserved |
| P224F | ISO/SAE Reserved |
| P2250 | O2 Sensor Reference Voltage Circuit High Bank 2 Sensor 1 |
| P2251 | O2 Sensor Negative Current Control Circuit/Open Bank 1 Sensor 1 |
| P2252 | O2 Sensor Negative Current Control Circuit Low Bank 1 Sensor 1 |
| P2253 | O2 Sensor Negative Current Control Circuit High Bank 1 Sensor 1 |
| P2254 | O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1 |
| P2255 | O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1 |
| P2256 | O2 Sensor Negative Current Control Circuit High Bank 2 Sensor 1 |
| P2257 | Secondary Air Injection System Control “A” Circuit Low |
| P2258 | Secondary Air Injection System Control “A” Circuit High |
| P2259 | Secondary Air Injection System Control “B” Circuit Low |
| P225A | ISO/SAE Reserved |
| P225B | ISO/SAE Reserved |
| P225C | ISO/SAE Reserved |
| P225D | ISO/SAE Reserved |
| P225E | ISO/SAE Reserved |
| P225F | ISO/SAE Reserved |
| P2260 | Secondary Air Injection System Control “B” Circuit High |
| P2261 | Turbocharger/Supercharger Bypass Valve – Mechanical |
| P2262 | Turbocharger/Supercharger Boost Pressure Not Detected – Mechanical |
| P2263 | Turbocharger/Supercharger Boost System Performance |
| P2264 | Water in Fuel Sensor Circuit |
| P2265 | Water in Fuel Sensor Circuit Range/Performance |
| P2266 | Water in Fuel Sensor Circuit Low |
| P2267 | Water in Fuel Sensor Circuit High |
| P2268 | Water in Fuel Sensor Circuit Intermittent |
| P2269 | Water in Fuel Condition |
| P226A | Water in Fuel Lamp Control Circuit |
| P226B | Turbocharger/Supercharger Boost Pressure Too High – Mechanical |
| P226C | ISO/SAE Reserved |
| P226D | ISO/SAE Reserved |
| P226E | ISO/SAE Reserved |
| P226F | ISO/SAE Reserved |
| P2270 | O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2 |
| P2271 | O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2 |
| P2272 | O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 2 |
| P2273 | O2 Sensor Signal Biased/Stuck Rich Bank 2 Sensor 2 |
| P2274 | O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 3 |
| P2275 | O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 3 |
| P2276 | O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 3 |
| P2277 | O2 Sensor Signal Biased/Stuck Rich Bank 2 Sensor 3 |
| P2278 | O2 Sensor Signals Swapped Bank 1 Sensor 3/Bank 2 Sensor 3 |
| P2279 | Intake Air System Leak |
| P227A | ISO/SAE Reserved |
| P227B | ISO/SAE Reserved |
| P227C | ISO/SAE Reserved |
| P227D | ISO/SAE Reserved |
| P227E | ISO/SAE Reserved |
| P227F | ISO/SAE Reserved |
| P2280 | Air Flow Restriction/Air Leak Between Air Filter and MAF |
| P2281 | Air Leak Between MAF and Throttle Body |
| P2282 | Air Leak Between Throttle Body and Intake Valves |
| P2283 | Injector Control Pressure Sensor Circuit |
| P2284 | Injector Control Pressure Sensor Circuit Range/Performance |
| P2285 | Injector Control Pressure Sensor Circuit Low |
| P2286 | Injector Control Pressure Sensor Circuit High |
| P2287 | Injector Control Pressure Sensor Circuit Intermittent |
| P2288 | Injector Control Pressure Too High |
| P2289 | Injector Control Pressure Too High – Engine Off |
| P228A | Fuel Pressure Regulator 1 – Forced Engine Shutdown |
| P228B | Fuel Pressure Regulator 2 – Forced Engine Shutdown |
| P228C | Fuel Pressure Regulator 1 Exceeded Control Limits – Pressure Too Low |
| P228D | Fuel Pressure Regulator 1 Exceeded Control Limits – Pressure Too High |
| P228E | Fuel Pressure Regulator 1 Exceeded Learning Limits – Too Low |
| P228F | Fuel Pressure Regulator 1 Exceeded Learning Limits – Too High |
| P2290 | Injector Control Pressure Too Low |
| P2291 | Injector Control Pressure Too Low – Engine Cranking |
| P2292 | Injector Control Pressure Erratic |
| P2293 | Fuel Pressure Regulator 2 Performance |
| P2294 | Fuel Pressure Regulator 2 Control Circuit/Open |
| P2295 | Fuel Pressure Regulator 2 Control Circuit Low |
| P2296 | Fuel Pressure Regulator 2 Control Circuit High |
| P2297 | O2 Sensor Out of Range During Deceleration Bank 1 Sensor 1 |
| P2298 | O2 Sensor Out of Range During Deceleration Bank 2 Sensor 1 |
| P2299 | Brake Pedal Position/Accelerator Pedal Position Incompatible |
| P229A | Fuel Pressure Regulator 2 Exceeded Control Limits – Pressure Too Low |
| P229B | Fuel Pressure Regulator 2 Exceeded Control Limits – Pressure Too High |
| P229C | Fuel Pressure Regulator 2 Exceeded Learning Limits – Too Low |
| P229D | Fuel Pressure Regulator 2 Exceeded Learning Limits – Too High |
| P229E | ISO/SAE Reserved |
| P229F | ISO/SAE Reserved |