P2000

DTC P2000: NOx Adosorptive Catalytic System Efficiency Below Threshold

NOTE:
- Information marked with double asterisk (**) applies to 2004-2005 M/T models.
- If some of the DTCs listed below are stored at the same time as DTC(P2000)**, troubleshoot those DTCs first, then recheck for DTC (P2000)**.

P0137, P0138: Secondary HO2S (Sensor 2)
P0141: Secondary HO2S (Sensor 2) heater
P0143, P0144: Third HO2S (Sensor 3)
P0147: Third HO2S (Sensor 3) heater

1. Reset the ECM with the HDS.
2. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on.
3. Keep the engine speed at 4,000 rpm for about 10 minutes.
4. Test-drive under these conditions:

- 55 - 65 mph (89 - 105 km/h) steady speed
- Transmission in 4th or 5th gear
- Until the readiness code or Temporary DTC (P2000)** and/or (P2000)** is set

5. Check for a Temporary DTCs or DTCs with the HDS.

Is DTC (P2000)** indicated?

YES - Check for cracks or melting in the NOx adsorptive three way catalytic converter. If it is damaged, replace the NOx adsorptive TWC.

NO - Intermittent failure, system is OK at this time.