P2000, P2001, P2423, P2424 and P2567 to P2577: NOx trap, hydrocarbon trap and ozone catalyst
A NOx storage catalyst (P2000, P2001) or a hydrocarbon adsorption catalyst (P2423, P2424) is working below its threshold, or the direct ozone reduction catalyst, its temperature sensor or its deterioration sensor has a fault or works poorly.
SeverityModerateUsually not urgent today, but it can get worse if left.
Can you keep driving?Drive gently, check it soonWhat does P2000 mean?
These are less common exhaust catalysts. A NOx trap, found on some lean-burn gasoline and diesel engines, stores nitrogen oxides and empties itself when the engine briefly runs rich. A hydrocarbon adsorber holds unburnt fuel during a cold start until the main catalyst is warm. A direct ozone reduction catalyst, used on a few cars, coats the radiator to break down ozone in the air passing through it. When one of them stops working well, emissions rise, but the engine itself is not harmed.
What causes P2000?
- A NOx trap aged or poisoned by sulfur in the fuel
- An engine problem that has overheated or fouled the catalyst
- A failed temperature or deterioration sensor, for the ozone catalyst codes
- Damage to the radiator coating, for the ozone catalyst efficiency code
What to check first for P2000
- Read all engine codes: a misfire or mixture fault often explains a tired catalyst
- Have the oxygen and NOx sensor readings checked around the catalyst
- Ask whether the maker has a regeneration or desulfurization procedure for the NOx trap
- For the ozone catalyst codes, inspect the radiator front and the sensor wiring
Can you drive with P2000?
You can usually drive to a workshop. The car may fail an emissions test; fix any misfire or mixture fault first, since it can damage a new catalyst too.
In states with an OBD-II emissions inspection, a car with the check engine light on fails the test until the fault is fixed.
Codes on this page
15
- P2000NOx Trap Efficiency Below ThresholdBank 1
- P2001NOx Trap Efficiency Below ThresholdBank 2
- P2423HC Adsorption Catalyst Efficiency Below ThresholdBank 1
- P2424HC Adsorption Catalyst Efficiency Below ThresholdBank 2
- P2567Direct Ozone Reduction Catalyst Temperature Sensor Circuit
- P2568Direct Ozone Reduction Catalyst Temperature Sensor Circuit Range/Performance
- P2569Direct Ozone Reduction Catalyst Temperature Sensor Circuit Low
- P2570Direct Ozone Reduction Catalyst Temperature Sensor Circuit High
- P2571Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic
- P2572Direct Ozone Reduction Catalyst Deterioration Sensor Circuit
- P2573Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance
- P2574Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low
- P2575Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
- P2576Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/Erratic
- P2577Direct Ozone Reduction Catalyst Efficiency Below Threshold
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
