I have an '05 Honda hybrid with 75000 miles. Recrntly the check engine light came on; the code I pulled was P2000-NOx trap below effiency threshold, bank 1. Any suggestions?
The catalyst for NOx reduction in the three-way catalytic converter has failed.
Honda issued a bulletin for P2000;
11-042 August 17, 2011
2003-05 Civic Hybrid ULEV (KA) - Check the iN VIN status for eligibility
MIL Comes On With DTC P1420 or P2000
The MIL comes on with one of the following DTCs:
2003 models - DTC P1420 (NOx Adsorptive Catalytic System Efficiency Below Threshold)
2004-05 models - DTC P2000 (NOx Adsorptive Catalytic System Efficiency Below Threshold)
The secondary heated oxygen sensor is deteriorated, and the PGM-FI software misinterprets its input as a deteriorated NOx adsorptive three-way catalytic converter and sets DTC P1420 or P2000.
Replace both the secondary and third heated oxygen sensors.
NOTE : To prevent a comeback, make sure you replace both of the sensors.
Oxygen Sensor Kit: P/N 06365-PZA-A00
(Includes the secondary and third heated oxygen sensors)