PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

My Formula threw a...

09-30-2006 | 06:09 AM

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My Formula threw a...

...420 code - 'Catalyst System Effiency below threashold (bank 1), which catalyst is bank one? The drivers side or passenger side?

Code 420

Thanks.

09-30-2006 | 10:46 AM

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Driver's side.

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