P1420 Diagnostic Trouble Code Discussion for April 2005
NOX Adsorptive Catalytic System Efficiency Too Low
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| Help Request | Posted | |
| 1999 BMW 740iL 4.4L MIL Lamp on VIN: WBAGH8330X P1420: mfr controlled aux emission control. Not sure where to start on this one. My info is not real good. Any help would be great. |
April 06, 2005 |
