P1421 Diagnostic Trouble Code Discussion for June 2007
Cold Start Emission Reduction Strategy Monitoring
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| Help Request | Posted | |
| 1998 BMW 528i 2.8L Poor Idle Quality, MIL Lamp on VIN: WBADM6332B P1421: manufacturer controled auxiliary emissions controles. Just got this one in and has a check engine on. pulled the codes and all are emission related and idle speed control. Not sure where to start on this one. Could it be idle control valve. it idles actually ok, not that bad but what should i do and where to look... |
June 30, 2007 |
