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
Exhaust Gas Recirculation System - Insufficient Flow Detected
P2415 moderate
Exhaust Gas Recirculation System - Excess Flow Detected
P2416 moderate
O2 Sensor Signal Biased/Stuck Rich - Bank 2 Sensor 2
P2417 moderate
O2 Sensor Signal Biased/Stuck Lean - Bank 2 Sensor 2
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 low
Secondary Air Injection System Air Flow/Pressure Sensor Circuit - Bank 2
P2431 low
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance - Bank 2
P2432 low
Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low - Bank 2
P2433 low
Secondary Air Injection System Air Flow/Pressure Sensor Circuit High - Bank 2
P2434 moderate
Secondary Air Injection System Pump Malfunction Circuit/Open
P2435 moderate
Secondary Air Injection System Pump Malfunction Circuit Low
P2436 moderate
Secondary Air Injection System Pump Malfunction Circuit High
P2437 moderate
Secondary Air Injection System Pump Malfunction Circuit Intermittent
P2438 low
EVAP Leak Detection Pump Circuit/Open
P2439 low
EVAP Leak Detection Pump Circuit Low
P2440 low
EVAP Leak Detection Pump Circuit High
P2441 low
EVAP Leak Detection Pump Circuit Intermittent
P2442 low
EVAP Emission System Purge Flow Circuit/Open
P2443 low
EVAP Emission System Purge Flow Circuit Low
P2444 low
EVAP Emission System Purge Flow Circuit High
P2445 low
EVAP Emission System Purge Flow Circuit Intermittent
P2446 low
EVAP Emission System Vent Control Circuit/Open
P2447 low
EVAP Emission System Vent Control Circuit Low
P2448 low
EVAP Emission System Vent Control Circuit High
P2449 low
EVAP Emission System Vent Control Circuit Intermittent
P2450 low
EVAP Switching Valve Circuit/Open
P2451 low
EVAP Switching Valve Circuit Low
P2452 low
EVAP Switching Valve Circuit High
P2453 low
EVAP Switching Valve Circuit Range/Performance
P2454 moderate
DPF Pressure Sensor Circuit/Open
P2455 moderate
DPF Pressure Sensor Circuit Low
P2456 moderate
DPF Pressure Sensor Circuit High
P2457 moderate
DPF Pressure Sensor Circuit Range/Performance
P2458 moderate
DPF Temperature Sensor (Bank 1) Circuit/Open
P2459 moderate
DPF Temperature Sensor (Bank 1) Circuit Low
P2460 moderate
DPF Temperature Sensor (Bank 1) Circuit High
P2461 moderate
DPF Temperature Sensor (Bank 1) Circuit Range/Performance
P2462 moderate
DPF Temperature Sensor (Bank 2) Circuit/Open
P2463 moderate
DPF Temperature Sensor (Bank 2) Circuit Low
P2464 moderate
DPF Temperature Sensor (Bank 2) Circuit High
P2465 moderate
DPF Temperature Sensor (Bank 2) Circuit Range/Performance
P2466 moderate
DPF Regeneration Frequency Malfunction
P2467 critical
DPF Regeneration Frequency Too Frequent/High
P2468 moderate
DPF Regeneration Frequency Circuit Low
P2469 moderate
DPF Regeneration Frequency Circuit High
P2470 critical
DPF Soot Accumulation Malfunction
P2471 critical
DPF Soot Accumulation Too Frequent/High
P2472 critical
DPF Soot Accumulation Circuit Low
P2473 critical
DPF Soot Accumulation Circuit High
P2474 moderate
Exhaust Gas Temperature Sensor (Bank 1 Sensor 3) Malfunction
P2475 moderate
Exhaust Gas Temperature Sensor (Bank 1 Sensor 3) Too Frequent/High
P2476 moderate
Exhaust Gas Temperature Sensor (Bank 1 Sensor 3) Circuit Low
P2477 moderate
Exhaust Gas Temperature Sensor (Bank 1 Sensor 3) Circuit High
P2478 moderate
Exhaust Gas Temperature Sensor (Bank 2 Sensor 3) Malfunction
P2479 moderate
Exhaust Gas Temperature Sensor (Bank 2 Sensor 3) Too Frequent/High
P2480 moderate
Exhaust Gas Temperature Sensor (Bank 2 Sensor 3) Circuit Low
P2481 moderate
Exhaust Gas Temperature Sensor (Bank 2 Sensor 3) Circuit High
P2482 moderate
Exhaust Gas Recirculation Cooler Bypass Malfunction
P2483 moderate
Exhaust Gas Recirculation Cooler Bypass Too Frequent/High
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 Recirculation Temperature Sensor Circuit/Open
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
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