This section covers OBD-II codes P2400 to P2499, which are primarily related to Emission Control.
| Code | Description |
|---|---|
| P2400 | Evaporative emission (EVAP) leak detection pump, control – open circuit |
| P2401 | Evaporative emission (EVAP) leak detection pump, control – circuit low |
| P2402 | Evaporative emission (EVAP) leak detection pump, control – circuit high |
| P2403 | Evaporative emission (EVAP) leak detection pump, sense circuit – open circuit |
| P2404 | Evaporative emission (EVAP) leak detection pump, sense circuit – range/performance problem |
| P2405 | Evaporative emission (EVAP) leak detection pump, sense circuit – circuit low |
| P2406 | Evaporative emission (EVAP) leak detection pump, sense circuit- circuit high |
| P2407 | Evaporative emission (EVAP) leak detection pump, sense circuit – circuit intermittent/erratic |
| P2408 | Fuel filler cap warning sensor/switch – circuit malfunction |
| P2409 | Fuel filler cap warning sensor/switch – range/performance problem |
| P240A | Evaporative emission (EVAP) leak detection pump heater – open circuit |
| P240B | Evaporative emission (EVAP) leak detection pump heater – circuit low |
| P240C | Evaporative emission (EVAP) leak detection pump heater – circuit high |
| P240D | ISO/SAE Reserved |
| P240E | ISO/SAE Reserved |
| P240F | ISO/SAE Reserved |
| P2410 | Fuel filler cap warning sensor/switch – circuit low |
| P2411 | Fuel filler cap warning sensor/switch – circuit high |
| P2412 | Fuel filler cap warning sensor/switch – circuit intermittent/erratic |
| P2413 | Exhaust gas recirculation (EGR) system – performance problem |
| P2414 | Heated oxygen sensor (H02S) 1, bank 1 – exhaust sample error / – implausible signal |
| P2415 | Heated oxygen sensor (H02S) 1, bank 2 – exhaust sample error / Engine coolant temperature (ECT) sensor – low signal |
| P2416 | Heated oxygen sensor (H02S) 2, bank 1/heated oxygen sensor (H02S) 3, bank 1 – signals transposed |
| P2417 | Heated oxygen sensor (H02S) 2, bank 2/heated oxygen sensor (H02S) 3, bank 2 – signals transposed |
| P2418 | Evaporative emission (EVAP) switching valve – open circuit |
| P2419 | Evaporative emission (EVAP) switching valve – circuit low |
| P241A | ISO/SAE Reserved |
| P241B | ISO/SAE Reserved |
| P241C | ISO/SAE Reserved |
| P241D | ISO/SAE Reserved |
| P241E | ISO/SAE Reserved |
| P241F | ISO/SAE Reserved |
| P2420 | Evaporative emission (EVAP) switching valve – circuit high |
| P2421 | Evaporative emission (EVAP) vent valve – valve stuck open |
| P2422 | Evaporative emission (EVAP) vent valve – valve stuck closed |
| P2423 | Hydrocarbon (HC) catalytic converter, bank 1 – efficiency below threshold |
| P2424 | Hydrocarbon (HC) catalytic converter, bank 2 – efficiency below threshold |
| P2425 | Exhaust gas recirculation (EGR) cooling valve – open circuit |
| P2426 | Exhaust gas recirculation (EGR) cooling valve – circuit low |
| P2427 | Exhaust gas recirculation (EGR) cooling valve – circuit high |
| P2428 | Exhaust gas temperature (EGT), bank 1 – temperature too high |
| P2429 | Exhaust gas temperature (EGT), bank 2 – temperature too high |
| P242A | Exhaust gas temperature sensor 3, bank 1 -circuit malfunction |
| P242B | Exhaust gas temperature sensor 3, bank 1 -circuit range/performance |
| P242C | Exhaust gas temperature sensor 3, bank 1 -circuit low |
| P242D | Exhaust gas temperature sensor 3, bank 1 -circuit high |
| P242E | Exhaust gas temperature sensor 3, bank 1 -circuit intermittent/erratic |
| P242F | Diesel particulate filter (DPF) – restriction/ash accumulation |
| P2430 | Secondary air injection (AIR) system, air flow/pressure sensor, bank 1 – circuit malfunction |
| P2431 | Secondary air injection (AIR) system, air flow/ pressure sensor, bank 1 – range/performance problem |
| P2432 | Secondary air injection (AIR) system, air flow/ pressure sensor, bank 1 – circuit low |
| P2433 | Secondary air injection (AIR) system, air flow/pressure sensor, bank 1 – circuit high |
| P2434 | Secondary air injection (AIR) system, air flow/ pressure sensor, bank 1 – circuit intermittent/ erratic |
| P2435 | Secondary air injection (AIR) system, air flow/pressure sensor, bank 2 – circuit malfunction |
| P2436 | Secondary air injection (AIR) system, air flow/ pressure sensor, bank 2 – range/performance problem |
| P2437 | Secondary air injection (AIR) system, air flow/pressure sensor, bank 2 – circuit low |
| P2438 | Secondary air injection (AIR) system, air flow/pressure sensor, bank 2 – circuit high |
| P2439 | Secondary air injection (AIR) system, air flow/ pressure sensor, bank 2 – circuit intermittent/ erratic |
| P243A | ISO/SAE Reserved |
| P243B | ISO/SAE Reserved |
| P243C | ISO/SAE Reserved |
| P243D | ISO/SAE Reserved |
| P243E | ISO/SAE Reserved |
| P243F | ISO/SAE Reserved |
| P2440 | Secondary air injection (AIR) switching valve, bank 1 – valve stuck open |
| P2441 | Secondary air injection (AIR) switching valve, bank 1 – valve stuck closed |
| P2442 | Secondary air injection (AIR) switching valve, bank 2 – valve stuck open |
| P2443 | Secondary air injection (AIR) switching valve, bank 2 – valve stuck closed |
| P2444 | Secondary air injection (AIR) pump, bank 1 – pump stuck on |
| P2445 | Secondary air injection (AIR) pump, bank 1 – pump stuck off |
| P2446 | Secondary air injection (AIR) pump, bank 2 – pump stuck on |
| P2447 | Secondary air injection (AIR) pump, bank 2 – pump stuck off |
| P244A | Diesel particulate filter (DPF) – differential pressure too low |
| P244B | Diesel particulate filter (DPF) – differential pressure too high |
| P244C | Diesel particulate filter (DPF), bank 1 – exhaust temperature too low for regeneration |
| P244D | Diesel particulate filter (DPF), bank 1 – exhaust temperature too high for regeneration |
| P244E | Diesel particulate filter (DPF), bank 2 – exhaust temperature too low for regeneration |
| P244F | Diesel particulate filter (DPF), bank 2 – exhaust temperature too high for regeneration |
| P2450 | Evaporative Emission System Switching Valve Performance/Stuck Open |
| P2452 | Diesel Particulate Filter Pressure Sensor “A” Circuit |
| P2453 | Diesel Particulate Filter Pressure Sensor “A” Circuit Range/Performance |
| P2454 | Diesel Particulate Filter Pressure Sensor “A” Circuit Low |
| P2455 | Diesel Particulate Filter Pressure Sensor “A” Circuit High |
| P2458 | Diesel Particulate Filter Regeneration Duration |
| P2459 | Diesel Particulate Filter Regeneration Frequency |
| P245A | Exhaust gas recirculation (EGR) cooler bypass valve – control circuit malfunction |
| P245B | Exhaust gas recirculation (EGR) cooler bypass valve – control circuit range/performance / Heated oxygen sensor (H02S) 1, bank 1 – no signal |
| P245C | Exhaust gas recirculation (EGR) cooler bypass valve – control circuit low / Heated oxygen sensor (H02S) 1, bank 1 – signal high, heater circuit |
| P245D | Exhaust gas recirculation (EGR) cooler bypass valve – control circuit high / Heated oxygen sensor (H02S) 1, bank 1 – signal low |
| P245E | Diesel particulate filter (DPF) pressure sensor B – circuit malfunction |
| P245F | Diesel particulate filter (DPF) pressure differential sensor 8 – circuit range/performance |
| P2460 | Diesel Particulate Filter Pressure Sensor “B” Circuit Low |
| P2461 | Diesel Particulate Filter Pressure Sensor “B” Circuit High |
| P2462 | Diesel Particulate Filter Pressure Sensor “B” Circuit Intermittent/Erratic |
| P2463 | Diesel Particulate Filter Restriction – Soot Accumulation |
| P2464 | Diesel Particulate Filter Differential Pressure Too Low Bank 2 |
| P2465 | Diesel Particulate Filter Differential Pressure Too High Bank 2 |
| P2466 | Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 3 |
| P2467 | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 3 |
| P2468 | Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3 |
| P2469 | Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 3 |
| P246A | Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 3 |
| P246B | Vehicle Conditions Incorrect for Diesel Particulate Filter Regeneration |
| P246C | Diesel Particulate Filter Restriction – Forced Limited Power |
| P246D | Diesel Particulate Filter Pressure Sensor “A”/”B” Correlation |
| P246E | Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 4 |
| P246F | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 4 |
| P2470 | Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 4 |
| P2471 | Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 4 |
| P2472 | Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 4 |
| P2473 | Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4 |
| P2474 | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 4 |
| P2475 | Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 4 |
| P2476 | Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 4 |
| P2477 | Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 4 |
| P2478 | Exhaust Gas Temperature Out of Range Bank 1 Sensor 1 |
| P2479 | Exhaust Gas Temperature Out of Range Bank 1 Sensor 2 |
| P247A | Exhaust Gas Temperature Out of Range Bank 1 Sensor 3 |
| P247B | Exhaust Gas Temperature Out of Range Bank 1 Sensor 4 |
| P247C | Exhaust Gas Temperature Out of Range Bank 2 Sensor 1 |
| P247D | Exhaust Gas Temperature Out of Range Bank 2 Sensor 2 |
| P247E | Exhaust Gas Temperature Out of Range Bank 2 Sensor 3 |
| P247F | Exhaust Gas Temperature Out of Range Bank 2 Sensor 4 |
| P2480 | Exhaust Gas Temperature Sensor Circuit/Open Bank 1 Sensor 5 |
| P2481 | Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 5 |
| P2482 | Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 5 |
| P2483 | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 5 |
| P2484 | Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 5 |
| P2485 | Exhaust Gas Temperature Sensor Circuit/Open Bank 2 Sensor 5 |
| P2486 | Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 5 |
| P2487 | Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 5 |
| P2488 | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 5 |
| P2489 | Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 5 |
| P248A – P24FF | ISO/SAE Reserved |
| P2495 | EGR Cooler Bypass Bank 1 Position Sensor Circuit High |
| P24A4 | Diesel Particulate Filter Soot Accumulation Excessive |
| P24C6 | Particulate Matter Sensor Temperature Circuit Error |