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P0420 Diagnostic Trouble Code Discussion for December 2006

Catalyst Efficiency Below Normal (Bank 1)

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Trouble Ticket Help Requests for DTC P0420
Help Request Posted
1999 Honda Odyssey EX 3.5L MIL Lamp on VIN: 2HKRL186XX
P0420: Catalyst Efficiency Below Threshold (Bank 1). ... replaced at another business that went out of business. It came to us a month ago with MIL on, P0420. We found this converter bad by heat measurement. It was replaced and no other problems found. Fuel trim was + 1.0 % This vehicle is back after 2000 miles ...
December 05, 2006
2002 Daewoo Lanos S 1.6L MIL Lamp on VIN: KLATA22612
P0420: cat efficy. ... this boat anchor. customer had some work done recently somewere, and ever since her MIL light has been on. i pulled the codes through global obd2 with my snappy mt2500 (the only way i can) and got p1336 58x crank relearn and po420 cat effciy my only proble...
December 29, 2006