P24xx OBD-II Codes (P2400–P2499)
100 fault codes in the P24xx range. Click any code for causes, diagnostic steps, severity, and common fixes.
P2400 low
Evaporative Emission System Leak Detection Pump Control Circuit Open
P2401 low
Evaporative Emission System Leak Detection Pump Control Circuit Low
P2402 low
Evaporative Emission System Leak Detection Pump Control Circuit High
P2403 low
Evaporative Emission System Leak Detection Pump Sense Circuit Open
P2404 low
Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance
P2405 low
Evaporative Emission System Leak Detection Pump Sense Circuit Low
P2406 low
Evaporative Emission System Leak Detection Pump Sense Circuit High
P2407 low
Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic
P2408 low
Fuel Cap Sensor/Switch Circuit
P2409 low
Fuel Cap Sensor/Switch Circuit Range/Performance
P2410 low
Fuel Cap Sensor/Switch Circuit Low
P2411 low
Fuel Cap Sensor/Switch Circuit High
P2412 low
Fuel Cap Sensor/Switch Circuit Intermittent/Erratic
P2413 moderate
Exhaust Gas Recirculation System Performance
P2414 moderate
O2 Sensor Exhaust Sample Error (Bank 1 Sensor 1)
P2415 moderate
O2 Sensor Exhaust Sample Error (Bank 2 Sensor 1)
P2416 moderate
O2 Sensor Signals Swapped Bank 1 Sensor 2/Bank 1 Sensor 3
P2417 moderate
O2 Sensor Signals Swapped Bank 2 Sensor 2/Bank 2 Sensor 3
P2418 low
EVAP System Switching Valve Control Circuit Open
P2419 low
EVAP System Switching Valve Control Circuit Low
P2420 low
EVAP System Switching Valve Control Circuit High
P2421 low
EVAP Vent Valve Stuck Open
P2422 low
EVAP Vent Valve Stuck Closed
P2423 moderate
HC Adsorption Catalyst Efficiency Below Threshold - Bank 1
P2424 moderate
HC Adsorption Catalyst Efficiency Below Threshold - Bank 2
P2425 moderate
Exhaust Gas Recirculation Cooling Valve Control Circuit Open
P2426 moderate
Exhaust Gas Recirculation Cooling Valve Control Circuit Low
P2427 moderate
Exhaust Gas Recirculation Cooling Valve Control Circuit High
P2428 critical
Exhaust Gas Temperature Too High - Bank 1
P2429 critical
Exhaust Gas Temperature Too High - Bank 2
P2430 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Bank 1
P2431 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance Bank 1
P2432 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low Bank 1
P2433 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 1
P2434 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 1
P2435 moderate
Secondary Air Injection System Pump Malfunction Circuit Low
P2436 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance Bank 2
P2437 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low Bank 2
P2438 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 2
P2439 moderate
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/Erratic Bank 2
P2440 serious
Secondary Air Injection System Switching Valve Stuck Open Bank 1
P2441 serious
Secondary Air Injection System Switching Valve Stuck Closed Bank 1
P2442 serious
Secondary Air Injection System Switching Valve Stuck Open Bank 2
P2443 serious
Secondary Air Injection System Switching Valve Stuck Closed Bank 2
P2444 serious
Secondary Air Injection System Pump Stuck On Bank 1
P2445 serious
Secondary Air Injection System Pump Stuck Off Bank 1
P2446 serious
Secondary Air Injection System Pump Stuck On Bank 2
P2447 serious
Secondary Air Injection System Pump Stuck Off Bank 2
P2448 moderate
Secondary Air Injection System High Air Flow Bank 1
P2449 moderate
Secondary Air Injection System High Air Flow Bank 2
P2450 low
EVAP Switching Valve Circuit/Open
P2451 low
EVAP Switching Valve Circuit Low
P2452 moderate
Diesel Particulate Filter Pressure Sensor A Circuit
P2453 moderate
Diesel Particulate Filter Pressure Sensor A Circuit Range/Performance
P2454 moderate
Diesel Particulate Filter Pressure Sensor A Circuit Low
P2455 moderate
Diesel Particulate Filter Pressure Sensor A Circuit High
P2456 moderate
Diesel Particulate Filter Pressure Sensor A Circuit Intermittent
P2457 serious
Exhaust Gas Recirculation (EGR) Cooling System Performance
P2458 moderate
Diesel Particulate Filter Regeneration Duration
P2459 moderate
Diesel Particulate Filter Regeneration Frequency
P2460 moderate
Diesel Particulate Filter Pressure Sensor "B" Circuit Low
P2461 moderate
Diesel Particulate Filter Pressure Sensor "B" Circuit High
P2462 moderate
Diesel Particulate Filter Pressure Sensor "B" Circuit Intermittent/Erratic
P2463 serious
Diesel Particulate Filter Restriction — Soot Accumulation
P2464 serious
Diesel Particulate Filter Differential Pressure Too Low Bank 2
P2465 serious
Diesel Particulate Filter Differential Pressure Too High Bank 2
P2466 moderate
Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 3
P2467 moderate
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 3
P2468 moderate
Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3
P2469 moderate
Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 3
P2470 moderate
Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 4
P2471 moderate
Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 4
P2472 moderate
Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 1 Sensor 4
P2473 moderate
Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4
P2474 moderate
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 4
P2475 moderate
Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 4
P2476 moderate
Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 4
P2477 moderate
Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 4
P2478 moderate
Exhaust Gas Temperature Out of Range Bank 1 Sensor 1
P2479 moderate
Exhaust Gas Temperature Out of Range Bank 1 Sensor 2
P2480 moderate
Exhaust Gas Temperature Sensor Circuit/Open Bank 1 Sensor 5
P2481 moderate
Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 5
P2482 moderate
Exhaust Gas Recirculation Cooler Bypass Malfunction
P2483 moderate
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 5
P2484 moderate
Exhaust Gas Recirculation Cooler Efficiency Below Threshold
P2485 moderate
Exhaust Gas Recirculation Cooler Efficiency Circuit/Open
P2486 moderate
Exhaust Gas Recirculation Cooler Efficiency Circuit Low
P2487 moderate
Exhaust Gas Recirculation Cooler Efficiency Circuit High
P2488 moderate
Exhaust Gas Recirculation Temperature Sensor Below Threshold
P2489 moderate
Exhaust Gas Temperature Sensor Circuit Intermittent/Erratic Bank 2 Sensor 5
P2490 moderate
Exhaust Gas Recirculation Temperature Sensor Circuit Low
P2491 moderate
Exhaust Gas Recirculation Temperature Sensor Circuit High
P2492 moderate
Exhaust Flap Position Sensor Below Threshold
P2493 moderate
Exhaust Flap Position Sensor Circuit/Open
P2494 moderate
Exhaust Flap Position Sensor Circuit Low
P2495 moderate
Exhaust Flap Position Sensor Circuit High
P2496 moderate
Turbocharger Wastegate Control Below Threshold
P2497 moderate
Turbocharger Wastegate Control Circuit/Open
P2498 moderate
Turbocharger Wastegate Control Circuit Low
P2499 moderate
Turbocharger Wastegate Control Circuit High